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analog demultiplexing?

Is it a good idea to use just a single DAC to produce 2 or more separate analog outputs? I do not need super fast updating rate, but I do need precision. My DAC is a old but pretty cool looking DAC71, of which I have like a handful. It has a 16 bit parallel interface (which is a REAL PAIN) and a CC output. Placing a small resistor on the output of that gives me a voltage range. To interface it to an arduino, I used two 74C164 shift registers so that I only use 2 pins on the arduino. (one for clock, the other for data). However, the DAC does not have an updating rate, it is kinda analog in that respect. Because of that, you can see all the garbage from the shift register outputs while data is being shifted in. My current solution to this problem was to use a spare TL601 analog switch and a 3rd wire from the arduino to "mask" the updating period when data is being shifted into the registers. This worked well, until the wire popped out and came into contact with +12V rail, killing arduino pin 10. :(  so sad, it was literally a brand new arduino clone... In a similar fashion that the output of a single ignition coil in a car is fed into a distributor to distribute voltage to the correct spark plugs, is it OK to use a few more analog switches to do some interlacing? Are there things that I potentially have not considered? My idea is that after data for, say, output A has been shifted into the 2 registers, the arduino will activate switch A and (through a buffer amp) charge a capacitor up to the same voltage, then turn switch A off while shifting in data for output B, then activating switch B to allow the capacitor to charge up to that voltage, and again the switches turn off to let new data for output A shift in, and the process repeats. The capacitors will "remember" what voltage they held during the off period, as sort of analog memory. I think the updating rate will take a hit, but oh well.

Question by -max-  


Analog multiplexer or analog to digital converter to add analog inputs to NodeMCU?

I asked a question earlier today and yesterday on this forum as well as others about the best analog multiplexer to use to add a few additional analog inputs to a NodeMCU. Someone recommended using an ADS1115 analog to digital converter. I am using this for an automatic garden watering project, where I need to read the values from multiple capacitive soil moisture sensors. Here is a link to the sensors- https://www.aliexpress.com/item/33042209039.html?spm=a2g0o.cart.0.0.52713c006kRBs8∓=1 My question is, would an analog multiplexer or analog to digital converter be better for this project? Thanks!

Question by Gadgets_and_Gear  


Arduino Analog Pin?

Can a arduino analog pin be used as a output pin?

Question by Bot1398    |  last reply


Analog photography contest ?

When the winner will be announced ?? - analog photography contest

Question by Mahir Asrani    |  last reply


Stuck analog stick?

Whenever I try to play with one of my original XBOX controllers, the left analog stick seems to be stuck in a down position. Physically, it's fine, but ingame my character is always moving backwards. I've tried multiple games and xboxes, but i can't get it to work. Any help?

Question by LiquidLightning    |  last reply


Digital or Analog Micrometer?

I've been looking into buying a micrometer, but having never owned (or for that matter, touched) a micrometer before, I am unsure of whether a digital or an analog one would be better. By better, I mean accurate, consistent, etc. Has anyone had any experience in buy a micrometer? Any help would be appreciated. Thanks!

Topic by Bran    |  last reply


Analog LED Bargraph?

Does anyone know if something similar to the in-13 nixie tube exists in LED form?  I'm building something where space and energy are huge constraints, and I need something, well similar to the in-13 nixie in LED form, lol.  Any ideas?

Topic by guyfrom7up    |  last reply


Analog Fading LED

Hello - I am brand new to electronics but am trying to learn about BEAM and other art + science circuits. I am looking to make a small analog circuit to fade in and out a LED. I have looked online but have found a bunch of ones using a 555 timer or a PWM and other chips. I saw a reference to doing this slow fade in and out technique using only capacitors and resistors but have been unable to find a diagram. Can someone help me out. FWIW - I am looking to charge this using solar and am only looking to drive one LED. Ideally a days charge would last a few hours of fade in and out cycling with the cycle time being slow - somewhat like the Mac "Sleeping" LED. Thank you in advance.

Topic by toddbg    |  last reply


Analog to Digital 16F628

I am a learner pic programmer and I am having some major grief trying to get the analog to digital (A2D) feature to work on my 16F628. All I would like to do is to be able to read in a value (either the most or least significant byte) and out put it again, just as a starting point for a project, the rest of which i can figure for myself. I have trauled the web for nigh on.. 3 hours and found few resources, but all were out of date or for a different chip. If anyone could help me either in terms of a bit of ASM code, some general guidence, or a link to a relevant tutorial that would be great. Thanks, Andy

Topic by andy    |  last reply


Converting digital headset to analogic one

Hello! :D Some time ago I have bought a Microsoft LifeChat LX-3000 digital, USB headset. Hmm...maybe it was not the best choice, but I want to convert it into an analogic one. In theory it is simple: I only have to remove the incorporated digital-analogic analogic-digital signal converter and connect the 2 wires of the headset to 2 Jack 3.5mm, one for the microphone and one for the speakers. Reason: my laptop's sound card is much better than the headset's built-in one. I am pretty sure that this converter is located in the volume control box: www.turbozone.ro/fotografii/Casti/Microsoft_JUG-00003.jpg But things may not be as easy as they seem. Or are they? As far as I have heard, the cable from the volume control unit and the headset consists in 2 wires. The cable of my old cheap analogic headset consists in 2 wires too. It shouldn't be complicated: the microphone wire get tied with the microphone wire and the speakers wire get tied with the speakers wire. But when I opened the old cheap analogic headset I noticed that each of the 2 wires branches out in 2 respectively 3 separate wires when they reach the headset: a blue one, a red one, a yellow one, a green one and a blue-yellow one. This is quite strange, isn't it? Or...do I have to worry about that?; should I simply tie the 4 wires together - old&cheap; analogic speaker wire with LifeChat's speaker wire and old&cheap; analogic microphone wire with LifeChat's microphone wire? I don't want to do somethig wrong.^^ Thanks in advance. :)

Topic by mitzoc    |  last reply


Wanted: Analog or Digital Multimeter

If anybody has a old or broken analog/digital multimeter and would be willing to ship it to New York United States it would be really useful. 

Topic by Kante Tech    |  last reply


Floppy Disk Analog Audio

Recently i was experimenting with cassette tape loops and had this bright idea. so i googled it and found someone else had done this already of course. check this out; http://www.crunchgear.com/2009/04/25/video-recording-analog-audio-to-a-floppy-disk/could someone make a step by step instructable for this? (i dont understand it fully)thanks

Topic by synthetic_iron_oxide    |  last reply


Digital control analog synth?

Hi all! I have an idea buzzing round my head and I could really do with some guidance. I'd like to implement digital control over an analog synth so I could have presets saved on a microcontroller. The synth in question is Serge modular. All the info on various modules can be found on the link below. Ultimately I'd like to be able to save and recall knob and switch settings, not patching. I would like this to be at the highest resolution possible, so no MIDI. Ideally 16 or 14 bit resolution. I'm a beginner in this, although I do know how to solder, but I don't have the underlying technical knowledge. So, how doable is this? What do I need to consider? Has anyone done something similar? Thanks! https://www.cgs.synth.net

Question by Dierge    |  last reply


Storing Simple Analog Data

Hey guys! I just got this cool little temperature (LM35) and I had a small problem. I want to upload this sketch to my ATtiny45 and put it on my plane so I could get the temperature from above. Only problem is I have no way of seeing it. So is there a simple, easy solution to storing a couple of numbers? I though I could just set the temperature every 3 minutes to a variable, but if I turned the board off, the data would be lost. So I don't need to store tons of memory just a couple numbers! Thanks!

Topic by HavocRC    |  last reply


Recording digitally with an analog camcorder

I recently came into possession of a mid-eighties Newvicon analog camcorder. It has RCA outputs for the video and audio (mono), and I'd like to record the output from this camcorder as digital. The idea I had initially was to use something like a Flip video camera (in order to keep it portable), but then I realized that the Flip doesn't have an RCA input... in fact, nothing I know of has an RCA input, unless I wanted to plug it into a computer or a DVD recorder, which negates the simplicity of it recording to a video file that can be dragged and dropped onto my desktop. The reason for wanting to salvage this camcorder and use it instead of just using the Flip is because the video quality is incredibly "eighties" - the color is slightly askew, and the sensitivity to light means that moving the camera suddenly causes ghosting, which, to me, is desirable for the look i'm going for. Personally, I find it fun and interesting to use old things like this instead of the new stuff. The only drawback is the simplicity (or lack thereof) in being able to post things immediately in this digital YouTube age. I'd like to keep it portable. I'd like to keep it simple. Any ideas on a camcorder, or even a "digital go between" that would record onto an SD card or USB drive? Does anything like this exist? If not, I'd like something like an SD card go between, as I have a 32 GB SDHC that would work great for this kind of project. This is the same model camera - the video outputs are located on a proprietary PSU, which isn't a problem for me to carry around, or have plugged into an extension cord.

Topic by LinkTGF    |  last reply


Analog to Digital Conversion on PIC18f4520

Hello there! I am building a custom digital weighing scale. My issue is not about how to do A2D, but on how to use the least amount of power doing so.  So imagine you just placed an object on the scale, i want the microcontroller to notice a change in weight and perform a2d on the load cell voltage. Now i only want to perform this a2d once(or a few times to make sure it works), saving the value in the register, and then i want the microcontroller to go back to sleep. The microcontroller will keep sleeping unless the object is removed or the weight changed, where the A2D works again for a couple of times, notes the value, and then sleeps again. So my question is, does the A2D have to keep working to notice a change in the weight? or can that happen some other way?   I basically want to make my battery last a long time, and i want to do that by using the A2D only when needed. On another note, does a2d even use up alot of power? If i keep it running would it consume alot of my battery? If things are unclear please ask. I'm afraid i didn't articulate well. Thanks! 

Question by Chris414    |  last reply


A way to take digital photos with an analogic camera?

It exist a device or adaptator or someting for it?

Question by luciano234    |  last reply


Digital or analog clock with logic gates

Hi everyone I want to help you. Our teacher wants us to do digital or analog clock only through logic gates and we have no idea please need help thank you

Question by Mehmet Ömer Ceylan  


Solid Color Analog LED strip

I just want to make a backlit box with a logo on it. I'm looking for the backlighting to be green. Every single video or tutorial I find on Analog LED strips jumps straight into using a controller or an Arduino. Can I not just use a power supply? Can I use resistors or something of the like to send x amount of power to r, g, or b for the color I want? Is there not just a simple LED strip guide out there?

Question by BillW199    |  last reply


rgb led and 1 analog input? Answered

Im trying to make an rgb led light up in different colors to based on the analog input, for instance a "potentiometer" or equivelent like the lm324 controlling the input causes the input to go higher the red turns on then green and then blue progressively, i have some code worked up but am willing to work from scratch again, im working with the lm324 op-amp and an arduino w/328

Question by redd.the.cat    |  last reply


How to test an analog tv screen ?

I have a vega 542 TV that I recently purchased at a flea market . I took the outer cover off to find a mass of circuits, all labelled in Russian that I have no idea what they do. This small tv has an analog screen which I have no idea how to test. When I connect a power supply that is 3 v lower than recommend and was rewarded with a burst of static from the speaker and a high pitch hum from the circuits but a completely black screen. If you do anything that can help me get this working I'll be very pleased.

Question by csimpkins2    |  last reply


Analog and Digital inputs over serial?

Good day, question i am building a controller for my robot and i need to send the inputs(analog/digital) by xbee to my robot. now i am not good with programming i get stuck with the first line.... i want to know how i can program it to send it values over serial from xbee tot xbee on robot i didn't get anything work so far, maybe you guys cant help me with a start? Inputs -> arduino -> serial -> Xbee -> Xbee(receiver) -> arduino -> outputs(servo, lights, motors, steppenmotors) the inputs on the controller are 8 switches(digital) and 6 analoge joysticks! Prototype robot is pictured on the picture it had for now a arduino relay shield to control the motors but it will be change to a motor controller(I don't have one yet) any type is possible!

Question by mvan h1    |  last reply


increase analog read resolution arduino?

Is there a simple, hardware based way to use two analogRead pins on an arduino together for higher resolution?  I have a project that only needs two analog values, but the more accurate the value the better.  I do NOT want an external ADC, I am aware they exist, but I don't have time to get it shipped.  It doesn't need to be fast, or multiply the pins (just a value of 0-2047 would be fine, but 12 or 20 bit equivalent would be better).  Preferably something with just resistors and diodes, if that exists, but more components is okay too.  I was thinking something like a resistor-divider or something, but I can't figure out a simple way for that to work.   Again, I do NOT want a new ADC, I know how they works and that I can buy one, but I prefer just using the built-in one because there's no interface issue.  No matter how simple it "really is" I ALWAYS have a problem getting two components to communicate.    I'm using an UNO

Question by jduffy54    |  last reply


Analog text clock, help needed

Hi everyone.I'm pretty new to DIY'ing and I want to make my own analog text-based clock.The idea is to make it write "the time is [five minutes past] [three]" in 5 minute intervals. I figured if I made two round plates with text rotated for every 30 degrees and make them rotate under a bigger square, then my only concern would be to make a rotation for every 5 minute on the first wheel, and every hour on the second.That's where I need your help :)If I'm to buy a standard clock movement (http://www.clockworks.com/quartz.html), then how could I make the right corrections to it so my plates/wheels would rotate, so the text would be fixed in a square instead of moving slowly around?I hope I'm explaining myself clearly - the end result would look like this:The time is [five past] [three]The time is [ten past] [three]Drawing attached - in Danish, but I hope you get the picture.And don't mind about "o'clock" in the end for 00 minutes - we don't say that in my language, so that's not a problem.Any suggestions?

Topic by kirkeskov    |  last reply


The Analog Photography Challenge Official Rules

PLEASE REVIEW THESE OFFICIAL RULES BEFORE ENTERING THE CONTEST.  ENTRANTS WHO ARE MINORS: YOU MUST OBTAIN THE CONSENT OF YOUR PARENT OR LEGAL GUARDIAN BEFORE ENTERING THE CONTEST. ENTRY TO THE CONTEST IS FREE AND NO PAYMENT OR PURCHASE IS NECESSARY TO ENTER OR WIN, EXCEPT FOR THE STANDARD CHARGES OF YOUR INTERNET ACCESS PROVIDER. A PAYMENT OR PURCHASE WILL NOT IMPROVE YOUR CHANCES OF WINNING. VOID WHERE PROHIBITED BY LAW. BY ENTERING THE CONTEST YOU ACKNOWLEDGE THAT YOU HAVE READ AND AGREE TO THE TERMS AND CONDITIONS OF THE INSTRUCTABLES TERMS OF SERVICE AND PRIVACY POLICY   SECTION A – SPECIFIC TERMS FOR THIS CONTEST Sponsor. The Instructables Analog Photography Challenge is an on-line contest with skill, ability and knowledge components that is sponsored by Autodesk, Inc., a Delaware corporation having its principal office at 111 McInnis Parkway, San Rafael, CA 94103, USA (“Sponsor”), in connection with the Instructables service and website, www.instructables.com, (the “Sponsor Site”). The Contest is co-sponsored by the company or companies listed here, if any (each, a “Co-Sponsor”): Lomography. The Contest is governed by these Official Rules (these “Rules”). For any questions regarding the Contest, the Sponsor may be contacted by email at [service@instructables.com] or by phone at (01-510-473-7626) or by mail at the address identified in Section B.18 (“Winner’s List; Mailing List”) below. Overview; Object of the Contest. The object of the Contest is to share a how-to project that somehow uses an analog photography technique, tip, trick, skill, or hack that meets the Criteria (as described in Section A.8 [“Judging”] below) and are submitted in accordance with the format, content and other requirements identified in Section A.5 (“How to Enter”) below. All currency value references in these Official Rules are to United States Dollars, Euros, and British Pounds Sterling as indicated. Eligibility. THE CONTEST IS OPEN ONLY TO NATURAL PERSONS WHO, AT THE TIME OF ENTRY, ARE REGISTERED MEMBERS OF THE SITE, WHO ARE AT LEAST FOURTEEN (14) YEARS OLD AND ARE LEGAL RESIDENTS OF THE 50 UNITED STATES (INCLUDING THE DISTRICT OF COLUMBIA BUT EXCLUDING PUERTO RICO), CANADA (EXCLUDING THE PROVINCE OF QUEBEC, CANADA), UNITED KINGDOM, AUSTRALIA, BELGIUM, CHINA, THE NETHERLANDS. 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No purchase or payment is necessary to enter the Contest, and no purchase or payment, including choosing to purchase any “Instructables Pro” or other paid membership to the Sponsor Site will improve your chances of winning in any way. Deadline. The Contest begins at 12:00 a.m. Pacific Standard Time (PT)/8:00 a.m. GMT/9:00 a.m. CEST/4:00p.m. CST (China Standard Time), on May 28, 2012 (the “Start Date”). Entries for the Contest must be received by Sponsor by no later than 11:59 p.m. PT June 18, 2012 7:59am GMT/8:59 a.m. CEST/3:59 p.m. CST (China Standard Time) on June 5, 2012 (the “Deadline”). (GMT + 1 hour for Belgium, the Netherlands, GMT+ 8 hours for China). How to Enter. 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Total retail value: 160.00 United States Dollar, 128.14 EURO. 102.38 British Pound Sterling Tier [4] second prize: a Lomo Notebook, and a prize package including a 1-year Instructables Pro membership, a Sugru sample pack, and an Instructables robot t-shirt, Total retail value: 60.00 United States Dollar, 48.05 EURO. 38.39 British Pound Sterling Tier [4] third prize: a 1-year Instructables Pro membership, a Sugru sample pack, and an Instructables robot t-shirt, Total retail value: 45.00 United States Dollar 36.04 EURO. 28.29 British Pound Sterling The total estimated retail value of all prizes possibly awarded in the Contest is: 265.00 United States Dollar, 169.57 EURO, 212.24 British Pound Sterling Judging. All entries that are in compliance with all terms and conditions of these Rules will be judged on the basis of the following criteria (the "Criteria"): originality, usefulness, simplicity, and clarity of instructions, each of which will be given equal weight. 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The number of eligible entries for Sponsor's recently completed contests generally has ranged from approximately forty (40) to approximately six-hundred fifty (650), and generally has averaged approximately one-hundred fifty (150), but Sponsor cannot predict or guarantee any specific number of eligible entries for the Contest. SECTION B – ADDITIONAL TERMS FOR THIS CONTEST   General Conditions. By entering the Contest, each entrant agrees to abide by the terms of these Rules and by the decisions of Sponsor and the Judges, which shall be made in all cases in their sole and absolute discretion and are final and binding on all matters relating to the Contest. These Rules are a legally binding contract, with equivalent effect to a private contract between each entrant and Sponsor. The Contest is void where prohibited by law The Contest is governed by Sponsor's Terms [https://www.instructables.com/tos.html] and Privacy Policy [https://www.instructables.com/about/privacy.jsp]and other policies (collectively, the “Policies”) pertaining to the Sponsor Site, although the Rules will govern any conflict between the Rules and the Sponsor’s Terms or the Rules and the Privacy Policy. Exclusions from Eligibility. Employees of Sponsor, any Co-Sponsor, or their respective parents, subsidiaries, affiliates, partners, suppliers, or advertising or promotional agencies (including without limitation any Judges who are employees of Sponsor, any Co-Sponsor or any of their respective parents, subsidiaries, or affiliates), as well as members of their households or their immediate families (i.e., spouses, parents and children), may submit entries in the Contest, but any such entries are for information and entertainment purposes only and are not eligible to be considered for the purpose of selecting finalists or winners. Judges who are not employees of Sponsor, any Co-Sponsor or any of their respective parents, subsidiaries, or affiliates, are not eligible to enter or win, nor are members of their households or their immediate families (i.e., spouses, parents and children). Notwithstanding the foregoing, Sponsor shall have no liability to any entrant or any other person in the event that Sponsor inadvertently awards a prize to any non-eligible person(s). In addition, each entrant acknowledges and accepts that Sponsor may be prohibited by applicable law from permitting entry by or awarding a prize to any person falling into one or more of the following prohibited categories: (a) a national or resident of Cuba, Iran, Iraq, Libya, North Korea, Sudan, Syria or any other country for which trade with the United States has been prohibited or restricted by any statute, regulation, order, rule, treaty, or other law of the United States or any other applicable jurisdiction in any manner that would prevent the awarding or delivery of any prize to the entrant; (b) a person on the U.S. Table of Denial Orders, Entity List, List of Specially Designated Nationals and Blocked Persons, or any other similar list of any applicable jurisdiction, or any person affiliated with any person or entity on any such list; (c) an official or representative of any foreign government; or (d) any other person to whom the awarding or delivery of any prize would violate any applicable statute, regulation, order, rule, treaty, or other law or any of Sponsor's policies (See: https://www.instructables.com/about/privacy.jsp). If an entrant falls into any of the above prohibited categories, such entrant is not eligible to win any prizes. Entry. Multiple entries are permitted, but only one entry per entrant can win a prize in the Contest. Entrants must be registered members of the Sponsor Site to enter the Contest. Registering for a Sponsor Site membership account for purposes of entering the Contest is free of charge. Entries can be the work of more than one person, but for purposes of the Contest, each entry will belong to the “Primary Author” named in the entry, regardless of the number of contributors to that entry. For winning entries, Sponsor will award the applicable prize to the named entrant only, except in the case of a minor, to such minor’s named parent or legal guardian only unless specific consent from such parent or legal guardian to award the prize to such minor in accordance has been obtained by way of a duly signed Winner’s Declaration and Release (See Section A.7 above), and will not be responsible or liable for apportioning any prize among contributors to a winning entry. Upon submission, all entries become subject to the Policies (including without limitation the provisions regarding ownership and use of user submissions as stated in Sponsor’s Terms [https://www.instructables.com/tos.html]) and further described in Section B.15 (“Advertising and Marketing”). Notwithstanding the foregoing, entries to the Contest shall only be valid after the entry is accepted by Sponsor, and its acceptance occurs at Sponsor’s location in the United States.  Entries will not be acknowledged or returned. Entrants are permitted to modify or update an entry after submission, but are not permitted to do so after the Deadline. Entries may remain posted on the Contest page of the Sponsor Site indefinitely following the Deadline, but Sponsor reserves the right to delete entries from the Contest page after the Contest ends, in its discretion, and Sponsor reserves the right to delete entries from the Contest page and other pages of the Sponsor Site, at any time in its discretion, if such entries infringe or may infringe any third party’s rights. Entries may not be created or submitted through any software-generated, robotic, programmed, script, macro, or other automated method. Sponsor and Co-Sponsor will have no responsibility for, and will have the right to refuse in its discretion, any entries that have been tampered with, or entries that are misdirected, incomplete, non-conforming, corrupt, lost, late, or ineligible, whether due to Internet or e-mail server failure or otherwise. Proof of transmission of an entry shall not constitute proof of receipt. It is each entrant’s responsibility to keep Sponsor informed of any changes to entrant’s contact or other information during the Contest. Use of Personal Information. Registering for an account with the Sponsor Site, which is required to enter the Contest, may require each entrant to submit entrant’s name, e-mail address, age or date of birth, and other contact details, and in the case of a minor, contact details for a parent or legal guardian for purposes of obtaining proof of parental consent, if Sponsor elects to do so. For further information concerning how Sponsor handles personal information, as well as provisions on confidentiality and the cases in which Sponsor may be entitled to disclose entrant’s information to third parties or upon request of an authority, consult Sponsor’s Privacy Policy [https://www.instructables.com/about/privacy.jsp], which is incorporated herein. Additional Entry Requirements. Each entry must comply in all respects with the Policies, including without limitation all requirements for user submissions, as stated in the Terms and Conditions of Use [https://www.instructables.com/tos.html] for the Sponsor Site. Without limiting that requirement, each entry also must comply with the following: Each entry must be entirely the original work of the persons identified in the entry; If persons other than the entrant have contributed to an entry, the entrant must have the written permission from each contributor prior to submitting the entry; Entries must not have been published prior to the Start Date; Entries must not have been entered in more than two other contests of Sponsor; Entries must not contain anything that is or may be: (i) threatening, harassing, degrading or hateful; (ii) defamatory; (iii) fraudulent or tortious; (iv) obscene, indecent or otherwise objectionable; (v) deemed to cause feelings of disharmony, enmity, hatred or hostility between different religious or racial groups; (vi) protected by copyright, trademark, patents, utility models, design patents or other proprietary right without the express prior written consent of the owner of such right; or (vii) dangerous or potentially dangerous, or that would encourage dangerous behavior from viewers, such as use of explosives and/or harmful substances; or (vii) contrary to governmental policies of any country whose residents are eligible to enter the Contest. Entries must provide proper safety instructions, as applicable, such as with respect to the use of knives, cutting devices and other tools; and Entries must not contain any material that would give rise to criminal or civil liability or that encourages conduct that constitutes a criminal offense. Judging Process. The winner(s) will be determined by the Judges, who will apply the Criteria to evaluate entries. The entries with the highest score(s) will be selected as the winner(s), and the number and type of winners will be as identified in Section A above. The Judges have the right to disqualify any entry that is not in compliance with these Rules, in the Judges' discretion. In the event that a winning entry is disqualified, the next-highest scoring entry will be selected as the alternate winner.  In the event that one or more of the identified Judges is unavailable, Sponsor reserves the right to substitute Judges of comparable qualification, to be determined by Sponsor in its discretion. The Contest is entirely skill-based and contains no elements based on chance. The standards applied during the judging process focuses on assessing each entry’s properties. By the mere submission of an entry, an entrant acquires no automatic right to be awarded a prize, nor any other right except for the right to have such entry reviewed and evaluated subject to these Rules.   Prize Terms. All values are stated in United States Dollars, Euros and British Pounds Sterling, as indicated. If a stated prize is unavailable, Sponsor has the right to substitute one or more items of equal or greater value, in its discretion. No prize is, and the winner(s) have no right to claim that any prize is, exchangeable, transferable, or redeemable for cash. The winner(s) will be solely responsible for all expenses related to the receipt and use of all prize(s) other than those expenses expressly included in the description of the prize(s) in Section A above. The winner(s) will be solely responsible for complying with any and all applicable statutes, laws (including, without limitation, common law, if applicable), rules and regulations and for bearing any personal income, VAT, withholding taxes, customs duties, or other taxes, fees, insurance, surcharges or other costs relating to receiving, claiming or collecting any prize.   Winner(s) are hereby informed of the liability to pay all taxes on the prize(s) received; such taxes shall be paid by the winner(s). Each winner shall be responsible for reporting his or her individual income tax generated from the prize to relevant tax authorities on his or her own and, for residents subject to tax obligations on the prize by any country, shall promptly submit to Sponsor a tax payment proof showing that such tax has been fully paid. If the winner fails to submit such proof within a reasonable period of time as required by Sponsor, Sponsor reserves the right to disqualify the winner from entitlement to the prize and the winner shall be deemed to have waived his or her right to claim the prize and shall be further obligated, upon Sponsor’s request, to return the prize to Sponsor at his or her own cost. THE PRIZE(S) WILL BE GIVEN AWAY BY SPONSOR AND ANY CO-SPONSOR(S) “AS IS.” SPONSOR AND ANY CO-SPONSORS DO NOT MAKE, AND EXPRESSLY DISCLAIM, ANY WARRANTY, WHETHER EXPRESS, IMPLIED, OR STATUTORY, REGARDING ANY PRIZE OR PORTION THEREOF, INCLUDING WITHOUT LIMITATION ANY IMPLIED OR STATUTORY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, OR NON-INFRINGEMENT. SOME JURISDICTIONS MAY NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES, CONSUMER GUARANTEES AND SIMILAR RIGHTS, IN WHICH CASE SUCH EXCLUSION SHALL APPLY ONLY TO THE EXTENT PERMITTED BY APPLICABLE LAW IN THE RELEVANT JURISDICTION. WITHOUT LIMITATION, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ALL WARRANTIES AND REPRESENTATIONS, IN RELATION TO THE PRIZES, WHETHER EXPRESS OR IMPLIED BY STATUTE, LAW (INCLUDING, WITHOUT LIMITATION, COMMON LAW, IF APPLICABLE), RULE, REGULATION, OR OTHERWISE, ARE HEREBY EXCLUDED. Announcement; Award of Prize(s). The winner(s) will be notified by e-mail within seven (7) days of selection. The winner(s) (and, if a winner is a minor, the winner’s parent or legal guardian) may be required to sign a Winner’s Declaration and Release which includes a declaration of eligibility, grant of publicity rights and a liability release, to the extent not prohibited by law, prior to receipt of a prize. The prize(s) will be awarded by way of delivery to Winner’s designated valid delivery address set forth on the Winner’s Declaration and Release. Unless otherwise specified in Section A, and provided that direct shipment costs by mail or parcel post (expressly excluding import duties and other duties or taxes, which are the winner’s sole responsibility) to Winner’s designated valid delivery address shall be borne by Sponsor, provided, however, if delivery is declined or fails by reason of winner’s failure to timely accept receipt or pay appropriate import duties and other duties or taxes) then the winner will be deemed to have declined acceptance of the prize and Sponsor reserves the right to reclaim the prize whereupon the prize will be returned to Sponsor and winner will no longer be eligible to receive the prize. The winner(s) may be required to provide Sponsor with a social security number, taxpayer identification number, or other identification or account number (if applicable) for tax purposes, and will provide Sponsor with all other information as may be required for Sponsor to comply with all applicable laws in connection with the award of any prize(s) to the winner(s). The winner(s) also may be required to provide Sponsor with proof that he or she is the Authorized Account Holder of the e-mail address associated with the winning entry. An “Authorized Account Holder” is the natural person who is assigned to an e-mail address by an Internet access provider or other organization responsible for assigning e-mail addresses to the domain associated with an e-mail address. In the event of a dispute, an entry will be deemed to have been submitted by the Authorized Account Holder of the e-mail address submitted at the time of entry. Failure to respond to a winner announcement, or return any required declarations or releases within fourteen (14) days (or any longer time specified by Sponsor in the applicable winner announcement) or to comply with any of the foregoing may result in disqualification and the selection of an alternate winner. It is Sponsor’s policy to assist U.S. government employees in meeting their obligations under their standards of ethical conduct; any prize(s) won in violation of those Standards should not be accepted and should be returned at Sponsor’s expense or destroyed. Without limitation, Sponsor shall not be liable for any failure to deliver any prizes due to any winner’s failure to accept delivery, to meet any of his or her obligations hereunder or due to the submission of any false, inaccurate or misleading information. Representations. By entering the Contest, each entrant represents and warrants that: (a) the entrant meets all eligibility requirements of the Contest; (b) in entering and participating in the Contest, the entrant has complied and will comply in all respects with these Rules, the Policies, and all applicable statutes, laws (including, without limitation, common law, if applicable), rules and regulations; and (c) the information provided in the entrant’s entry, including without limitation all contact information, is true, accurate, and complete in all respects. Assumption of Risk. By taking any action to create an entry for the Contest, each entrant, on his or her own behalf and on behalf of his or her personal representatives, heirs, executors, and assigns, acknowledges and agrees that: (a) ENTRANT AND HIS OR HER PERSONAL REPRESENTATIVES, HEIRS, EXECUTORS, AND ASSIGNS HAVE THE SOLE RESPONSIBILITY FOR THE CREATION OF THE ENTRY, WHICH IS DESIGNED AND CREATED BY THE ENTRANT FOLLOWING HIS OR HER OWN DECISION AND INITIATIVE DEPENDINGG ON THE WAY, IN HIS OR HER SOLE DISCRETION ENTERANT DECIDES TO CREATE SUCH ENTRY, AND EVEN THOUGHT THE CONTEST DOES NOT REQUIRE OR OTHERWISE ENCOURAGE DANGEROUS BEHAVIOR, THERE MAY BE DANGER AND RISK OF BODILY INJURY, DEATH, OR PROPERTY DAMAGE INVOLVED IN CREATING AN ENTRY; (b) THESE RISKS AND DANGERS MAY ARISE FROM FORESEEABLE OR UNFORESEEABLE CAUSES; (c) SUCH ENTRANT AND HIS OR HER PERSONAL REPRESENTATIVES, HEIRS, EXECUTORS, AND ASSIGNS ASSUME ALL RISKS AND RESPONSIBILITY FOR ANY PERSONAL INJURY, DEATH, PROPERTY DAMAGE, OR OTHER LOSS ARISING OUT OF THE CREATION OF ANY ENTRY, WHETHER CAUSED BY NEGLIGENCE OR ANY OTHER CAUSE; and (d) Subject to applicable law, such entrant and his or her personal representatives, heirs, executors, and assigns are relinquishing any and all rights he, she, or they now have or may have in the future to sue or take any other action against Sponsor, any Co-Sponsor, the prize manufacturers, any other entities involved in the administration of the Contest, each of their respective parents, subsidiaries, and affiliates, and each of their respective officers, directors, employees, agents, and representatives (the “Sponsor Parties”) on the basis of any injury, death, damage, or other loss that may be suffered arising from any action taken in the creation of any entry, including but not limited to claims based on allegations of negligence by any of the Sponsor Parties or use of any machinery or materials. Without limitation, Sponsor Parties shall have no liability to any entrant or any other person in the event the entry or any acts or omissions of the entrant violates any of these Rules. Release. To the maximum extent permitted by law, by entering the Contest, each entrant releases and holds harmless the Sponsor Parties from any and all responsibility, liability, damages (including, without limitation, direct, indirect, incidental, consequential, punitive, statutory, and other damages), losses, costs, or expenses of any kind arising out of or relating to: (a) entry or participation in the Contest, including but not limited to disputes among individuals claiming to have contributed to any winning entry; (b) any violation by the entrant of these Rules, the Policies, or applicable laws; (c) misappropriation, infringement, or other violation of any copyright, trademark, patent, trade secret, right of publicity, privacy, or other legal or contractual right of any person attributable to entrant or any entry submitted by entrant; (d) the acceptance, possession, receipt, or use of any prize or any item purchased with any prize (e.g., if the prize includes a gift card); (e) any entries or votes that have been tampered with or that are misdirected, incomplete, non-conforming, corrupt, lost, late, or ineligible; (f) any problems or technical malfunctions (including but not limited to errors, omissions, interruptions, deletions, defects, or delays in operation or transmission) of any computer, telephone, modem, cable, satellite, network, hardware, online system, server, software, or other equipment or provider, including any incorrect, incomplete, garbled or jumbled information resulting therefrom; (g) any Internet traffic congestion or website accessibility or delays; (h) printing or typographical errors in any Contest-related materials; or (i) any other technical or human error that may occur in connection with the Contest (the “Causes”).  If anyone makes any claim against any of the Sponsor Parties arising out of or relating to any of the Causes attributable to the entrant, the entrant will pay for any damages, losses, liabilities, costs, penalties, and expenses, including without limitation attorneys’ and experts’ fees and costs, incurred in connection with such claim. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, THE SPONSOR PARTIES SHALL NOT BE LIABLE FOR ANY LOST PROFITS OR ANY SPECIAL, INCIDENTAL, INDIRECT, PUNITIVE, EXEMPLARY, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE CONTEST, HOWSOEVER CAUSED, WHETHER ARISING IN STATUTE, TORT (INCLUDING, WITHOUT LIMITATION, NEGLIGENCE) CONTRACT, OTHER LEGAL THEORY OR OTHERWISE, AND ALL SUCH DAMAGES ARE HEREBY DISCLAIMED AND EXCLUDED. SOME JURISDICTIONS MAY NOT ALLOW THE LIMITATION OR EXCLUSION OF LIABILITY FOR DAMAGES AND OTHER LIABILITY (INCLUDING INCIDENTAL OR CONSEQUENTIAL DAMAGES) IN WHICH CASE SUCH LIMITATION OR EXCLUSION SHALL APPLY ONLY TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, RULE, STATUTE OR REGULATION IN THE RELEVANT JURISDICTION. NOTHING IN THESE TERMS EXCLUDE LIABILITY FOR FRAUD, OR FOR PERSONAL INJURY OR DEATH CAUSED BY NEGLIGENCE TO THE EXTENT SUCH EXCLUSION IS PROHIBITED BY APPLICABLE LAW. Misconduct. Sponsor reserves the right, in its discretion, to disqualify any entrant who: (a) tampers with the entry or voting process, the operation of the Contest, the Sponsor Site, or affiliated websites; (b) acts in an unsporting or disruptive manner, or with intent to annoy or harass another person; or (c) is otherwise in violation of these Rules, the Policies, or any applicable laws. Termination. Sponsor reserves the right to suspend, modify, or terminate the Contest at any time for any reason, in its discretion, including without limitation in the event of fraud, abuse, tampering, technical, administrative, financial, or other difficulties. In such cases, Sponsor will post a notice on the Contest page of the Sponsor Site. Should the Contest terminate prior to selection of the winner, Sponsor will announce an alternate means of awarding the prize on the Contest page of the Sponsor Site. Any entrant may withdraw from the Contest at any time by contacting Sponsor by email at [service@instructables.com] or by phone at (01-510-473-7626) or by mail at the address identified in Section B.18 (“Winner’s List; Mailing List”) specifying the name of this Contest and any other relevant information.   Advertising and Marketing. By entering the Contest, and in consideration of Sponsor’s potential review and evaluation of his or her entry, each entrant grants to Sponsor the non-exclusive right to use his or her entry as provided in the Policies, including without limitation the provisions of the Terms and Conditions of Use [https://www.instructables.com/tos.html] regarding ownership and use of user submissions. WITHOUT LIMITING THE FOREGOING, TO THE MAXIMUM EXTENT PERMITTED BY LAW, BY ENTERING THE CONTEST, EACH ENTRANT CONSENTS, AND WARRANTS THAT IT HAS OBTAINED THE LEGALLY-BINDING WRITTEN CONSENT OR OTHER LEGALLY BINDING AUTHORIZATION (INCLUDING WITH REGARD TO THE USE AND MANAGEMENT OF COPYRIGHTS IN ALL CREATED CONTENT) OF EVERY CONTRIBUTOR TO THE ENTRY (INDIVIDUALS WHOSE NAME, LIKENESS, PROPERTY, RESULTS AND PROCEEDS APPEAR IN THE ENTRY), TO THE USE BY SPONSOR, ANY CO-SPONSOR, OR ANY THIRD PARTY CHOSEN BY SPONSOR OR ANY CO-SPONSOR, OF ANY AND ALL INFORMATION (INCLUDING PERSONAL INFORMATION), DRAWINGS, TEXT, PHOTOS, IMAGES, VOICES, VIDEOS, OR OTHER MATERIAL CONTAINED IN AN ENTRY OR OTHERWISE PROVIDED BY SUCH ENTRANT RELATED TO THE CONTEST FOR ADVERTISING AND MARKETING PURPOSES. Otherwise, each entrant retains whatever rights it may have in each entry to the extent provided in the Policies. The Sponsor, at its discretion, may require entrants to provide evidence of such written consents or other legally binding authorization. To the maximum extent permitted by law, by accepting a prize, a winner consents on his or her own behalf, to the print and online publication of the winner’s user name, stated country of residence and winning entry as part of the official winner’s list on the Instructables Site (and to submit this information, along with the winner’s first and last name, address , phone, email or other contact information to governmental agencies if required by applicable laws) without additional compensation other than the consideration specified in this Section 15 (Advertising and Marketing) for the entire protection term of the rights concerned and for all methods and means of exploitation. Each entrant and any other contributor whose personal information is being so used by Sponsor may request access to his or her personal information held by Sponsor and that Sponsor correct the data if it is inaccurate or delete the data if Sponsor is not required to retain it by law or for legitimate business purposes. Access, correction, deletion requests or withdrawal of consents can be made by contacting Sponsor by email at [service@instructables.com] or by phone at (01-510-473-7626) or by mail at the address identified in Section B.18 (“Winner’s List; Mailing List”), however, no consents will apply retroactively to any entrant’s personal information used prior to Sponsor’s receipt of any consent withdrawal. Other than as set forth herein, Sponsor will treat any personal information supplied by entrants in connection with the Contest in accordance with Sponsor’s Privacy Policy [https://www.instructables.com/about/privacy.jsp], as modified by these Rules. Governing Law; Dispute Resolution. By entering the Contest, entrants agree that these Rules will be governed by and construed in accordance with the laws of (a) Switzerland if the entrant’s principal place of residence is in a country in Europe, Africa or the Middle East, (b) Singapore if the entrant’s principal place of residence is in a country in Asia, Oceania or the Asia-Pacific region, or (c) the State of California (and, to the extent controlling, the federal laws of the United States) if the entrant’s principal place of residence is in a country in the Americas (including the Caribbean) or any other country not specified in this Section 16 (Governing Law; Dispute Resolution); provided, however, that in respect of all claims, actions and disputes brought by any of the Sponsor Parties, these Rules and shall be governed by and construed in accordance with the laws of the State of California (and, to the extent controlling, the federal laws of the United States). The laws of such jurisdictions shall govern without reference to the conflicts-of-laws rules thereof. The UN Convention on Contracts for the International Sale of Goods and the Uniform Computer Information Transaction Act shall not apply to (and are excluded from the laws governing) these Rules. In addition, by entering the Contest, entrants agree that any claim, action or dispute arising under or relating to this Agreement will be brought exclusively in (and the parties will be subject to the exclusive jurisdiction of) the Superior Court of the State of California, County of Marin, or the United States District Court for the Northern District of California in San Francisco, except that (other than with respect to claims, actions or disputes brought by any of the Sponsor Parties) if the entrant’s principal place of residence is in (a) a country in Europe, Africa or the Middle East, any such claim or dispute will be brought exclusively in (and the parties will be subject to the exclusive jurisdiction of) the courts of Switzerland, or (b) a country in Asia, Oceania or the Asia-Pacific region, any such claim or dispute will be brought exclusively in (and the parties will be subject to the exclusive jurisdiction of) the courts of Singapore. By entering the Contest, each entrant submits to the jurisdiction of those courts and waives any objection to those courts, whether on the basis of jurisdiction, venue, inconvenience of the forum, or otherwise.  Notwithstanding anything to the contrary, nothing will prevent any of the Sponsor Parties from bringing an action for infringement of intellectual property rights in any country where such infringement is alleged to occur. Miscellaneous. If any part of these Rules is held by a court of competent jurisdiction to be invalid, illegal, or otherwise unenforceable, such part will be modified by such court to the minimum extent necessary to make it enforceable while preserving to the maximum extent possible the original intent of and the remaining parts of these Rules will remain in full force and effect. Nothing contained herein or in any of the Contest related materials should be construed as an endorsement by Sponsor of any Co-Sponsor, or of Sponsor or any Co-Sponsor of any third party, product, or service. Notwithstanding anything to the contrary, Sponsor may decline to process requests that are unreasonable or unreasonably repetitive. Winner’s List; Mailing List. The user name(s) and entries of the Contest winner(s) will be posted on the Contest page https://www.instructables.com/id/The-Analog-Photography-Challenge/ of the Sponsor Site, within fourteen (14) days of the Deadline. In addition, the names of the winner(s) may be obtained by sending a written request and a self-addressed, stamped envelope to the below address (mailed requests must include the words “WINNER’S LIST” and the full name of the Contest prominently in the first line of the address): Instructables 82 2nd St. San Francisco, California 94105 USA or by contacting Sponsor by email at [service@instructables.com] or by phone at (01-510-473-7626) or by mail at the address identified in above. All requests must include the words “WINNER’S LIST” and the full name of the Contest prominently in the subject line or in the voicemail, as the case may be.   All such requests must be received within six (6) months of the Deadline. Sponsor’s telephone number for Contest purposes is (01-510-473-7626). Entrants who opt to join Sponsor’s electronic mailing list agree to be contacted by email by Sponsor. Requests for removal from Sponsor’s mailing list may be made as instructed in any such email, or by sending a written request and a self-addressed, stamped envelope to “Instructables Mailing List” at the above address, by calling the above telephone number, or as otherwise indicated on the Sponsor Site. Residents of Vermont may omit return postage on winner’s list and mailing list requests.   © 2012 Autodesk, Inc. All rights reserved. INSTRUCTABLES is a registered trademark or trademark in the United States of Autodesk, Inc. Other brands may be trademarks of their respective owners.

Topic by randofo  


Analog sine wave generator? (0v-5v)?

I am wondering how to create an analog (NOT digital) sine wave from 0 - +5 volts (Not -5 - +5). If you could, post a schematics diagram, or send a link to a page with the schematics. It has to have a variable pitch. Thanks, josh1324

Question by josh1324    |  last reply


how to turn analog video into digital dvd?

I have old camcorder analog tapes I would like put onto dvd. I tried dept. store software twice and it didn't work.

Question by trock    |  last reply


how to use puredata to control analog sensor ?

So far I have setup pd to read a arduino (without firmata) but I only get onstring of data from all sesnor Is posiblle to read each individual sensor.

Question by balam    |  last reply


Voltage: In search of a better analogy than water

I need to come up with a good analogy to describe the concept of Voltage. Water seems to be the most common analogy, but it seems to fail in some way. Here is a good water analogy that I found, but it still leaves questions that I cannot answer.The Lake Analogy: No force is pushing or pulling on the water inside a lake, so nothing moves. If it were possible to lift up on one side of the lake and tip it at an angle, gravity would pull on the water and it would flow. We have created a gravitational potential difference. The side that we lifted up on now has a higher potential than the lower side. Gravity will always cause water to flow from the point of highest potential to the point of lowest potential. The higher the difference between these two potentials, the more electrons will flow; the greater the current will be.Electricity is the same. When we attach a battery to a copper wire, the battery’s internal chemical reaction has created an electrical difference in potential. The negative terminal of a AA battery, has a higher potential than the positive terminal, so electrons will flow through the wire from the negative terminal to the positive. In this case, each coulomb of electrons will have the potential to do 1.5 joules of work as it passes through the wire. QUESTIONS: Does Voltage Push or Pull Electrons? The negative terminal of a AA battery repels electrons. This pushing force is what moves the electrons. However, we also know that electrons are attracted to a positive charge. So, are the electron being "pulled" by the positively charged battery terminal while being simultaneously pushed away by the negative terminal... or... does the negative terminal push the electrons away to a certain point, when the positive terminal begins to pull on them?With water, the only force is gravity, which is a pulling force. But with flowing electrons, it seems like the water analogy would require a pump there is only a pull, and no push. I guess... if you use a water pipe instead of a lake, and you use a water pump as an analogy for the battery, the end where the water is pushed out of the pump would be the negative terminal, and on the other end, water is being sucked into the pump, so that would be the positive terminal. But could you say that the sucking action of the pump is pulling the water towards that end, or the pushing action of the negative end is pushing the water towards the positive end? or Both? If so to what degree, and when? Meaning... as a water molecule is pushed out of the pump, is the sucking end already acting on and affecting the molecule, or does the sucking action only exert force on the water molecule at a certain point? It's all a real brain bender to me. Does anyone else know of a rock solid voltage analogy, or how I can improve this one?

Question by Dolmetscher007  


analog circuit to mimic constant resistance load? Answered

I unfortunately do not have many big resistors that can dissipate lots of power, and would like to make a dummy load to test and parameterize batteries and power supplies. I want constant power, constant current, and constant resistance load, I do have lots of opamps and a few N and P channel enhancement mode MOSFETs as well as many 2N3055s and a couple MJE2955's. I think constant current is the easiest, since all I need to do is make a closed loop controller that will turn off the transistor as the current is exceeded, and turn it on as the current falls. Constant power might be more tricky, as I need a device that controls the bias on a transistor as a function of the product of the voltage and current, since P=IE or W=AV, and similarly, constant resistance, I need a thing that will divide voltage across the pass element by the current through it. I don't want to use a "slow" microcontroller for this, I like nice continuous analog control system, if that is possible.

Question by -max-    |  last reply


Analog to Digital not correct for set trigger value Answered

I am trying to remedy false hits. I have a remote operated light that uses a 38MHz 3 leg IR sensor and a  TV remote for on/off, but it can have false hits, IE light may come on when ever.  I decided it needed a  long button press or in this case a long IR input. Because the IR sensor doesn't go from 0 to 5 volts i have set a threshold of 600. IR voltage values are, low is 1.8v and high is 3.6v. So i decided 2.75V could be a reasonable threshold value. that ROUGHLY translated to 600 if going from 0 to 1023. This sketch works good for a button but trying to use the IR sensor does not. I have tried to map the sensor and put a trigger value but something is a miss with my work. Any suggestions?  /* *  Press & Hold Switch LED program */ // Parameters int HOLD_DELAY = 500;    // Sets the hold delay of switch for LED state change int ledPin     = 9;      // LED is connected to pin x int switchPin  = A0;      // Switch is connected to pin x int val = 0; int statePin = LOW; int THRESHOLD = 600; // In-Program Variables unsigned long start_hold; boolean allow = false; int sw_state; int sw_laststate = LOW; int led_state = LOW; // Setup void setup() {   Serial.begin(9600);   pinMode(ledPin, OUTPUT);      // Set the LED pin as output   pinMode(switchPin, INPUT);    // Set the switch pin as input } // Loop void loop(){   int val = analogRead(switchPin);    val = map(val, 0, 1023, 0, 255);    if (val >= THRESHOLD) {     statePin = !statePin;         digitalWrite(ledPin, statePin);     Serial.print(val);     Serial.println("Triggered!");     delay(80);   sw_state = digitalRead(switchPin);             // read input value     if (sw_state == HIGH && sw_laststate == LOW){  // for button pressing     start_hold = millis();                       // mark the time     allow = true;                                // allow LED state changes   }        if (allow == true && sw_state == HIGH && sw_laststate == HIGH){  // if button remains pressed       if ((millis() - start_hold) >= HOLD_DELAY){                   // for longer than x/1000 sec(s)          led_state = !led_state;                                   // change state of LED          allow = false;                                            // prevent multiple state changes       }   }   sw_laststate = sw_state;     digitalWrite(ledPin, led_state);    } }  

Question by WWC    |  last reply


What exactly is the difference between analog and digital ICs??

I wanted to know whether LM 3915 is an analog IC or not...

Question by Yashknowsbetter    |  last reply


how can i transmit analog video signal?

For some application i need to transmit an analog video signal without cables, maybe through sound? or light/laser? is there some way that i can do it? i saw this instructable doing a similar thing: https://www.instructables.com/id/Transfer-Sound-on-a-Laser/ is the circuit capable of doing it with analog video signals? also, i know that when i transmit it in its analog form, losses will be significant. is it possible to transmit it in digital form and convert it back to analog? how?

Question by codestroy7  


How do you use an analog to digital converter?

I am fairly new to electronics and want to know how to use an analog to digital converter with an avr microcontroller preferably in c. I do not mean the built in one.

Question by sotsirh194    |  last reply


How do I use arduino's analog input? Answered

I'm building a 'time fountain' and i'm planning to make the arduino know how many droplets of water are falling each second. My ideia was to get two wires, get them really close and when there was a drop of water the circuit would close. The problem is, how do i get arduino to get readings right out of this?                        o (droplet) (positive) ---- ---- (analog input)

Question by Sowee    |  last reply


Is there a way to broadcast analog television on a non-commercial scale?

Basically what I'm asking is if there is a way that I could broadcast a Television signal from my home, without having to build a station. I was wondering if there could be a way to modify a HAM radio system or something along those lines to broadcast the system, Or if there is some other means by which i could take a signal and broadcast it.

Question by dkellythe1st    |  last reply


Is it possible to transmit an analog-videosignal with a mobilephone(instead of audio)?

Hi I wanted to ask if its possible to transmit an analog-videosignal with a mobile phone(instead of audio)? Because I want to transfer a video signal over a distance more than 1km and (in Austria) if you got an wireless camera its only allowed to transfer with 1mW and so you got a Max distance of 100m.   Thanks for help  

Question by just_watching    |  last reply


Need help with DMX512 to Analog 0-10VDC Decoder

I am looking to *update* some old strobe lights that my theater uses to be able to control them through our DMX control board.  They have 2 analog 0-10V inputs to control the flash rate and the intensity.  I am looking for the simplest solution as we do not have a lot of money to throw at this project.  I have some experience in electronics as well as working with arduino, but not enough to tackle this job by myself.   Any thoughts on this would be appreciated!  Attaching the control spec sheet. Tom

Topic by AJackOfAllTrades    |  last reply


How to wire an analog stick to a Raspberry Pi B+

So I have taken apart an old MADCATZ Wireless GameCube controller that broke a few years ago and i want to use a component or two in a project im working on.so far, i have desoldered and removed one of the two joysticks, but im not familiar with how to wire it to my Raspberry PI B+ board. The diagram i drew up is the underside of the component showing the 6 pins underneath. I intend to add two buttons, which i already understand how to connect.

Topic by EngineerJakit    |  last reply


How to convert analog MQ4 sensor output to ppm

Hi everyone,  My final year engineering involves a rover that can sense methane gas. Initially the idea was to just detect the gas as digital input but now i wanna do a bit more. I've searched all over the internet on how to convert the analog values to ppm, but couldn't understand any of it. I'd be really great-full if someone could give me the formula or the code to do this.  I don't intend on calibrating the sensor to find precise answers, just a rough picture of the ppm values is enough to begin with. Thanks a lot in advance. 

Topic by ZeeshanA27    |  last reply


Really small analog gauge controlled by simple circuit

I'm looking to make a steampunk version of dr who's sonic screwdriver with some LEDs, a tiny recording module for the sound, and I also wanted a little analog gauge with a needle that would activate when the button was pushed. It doesn't have to actually measure anything, I just want the needle to move in some way. i found a little voltmeter on sparkfun that I could probably repurpose, but it's 2x2 inches which is a little bigger than I wanted.  I'm looking for something about half that size. Does anyone know of anything that would fit the description, or a way I could fake it?

Topic by sasham43    |  last reply


Re-purposing a scanner CCD into an analog shift register

How tough would it be to do that? Based on the research I've done so far, That could be one hell of a challenge for a noob like me. Knowing that, is there a part (preferably 8-bit and has lots of inputs/outputs) that would do the same thing for me? This will be used in a similar fashion as a CCD sensor setup, but light isn't the medium I want to measure

Question by The Ideanator    |  last reply


AtTiny85 port analog / digital setup order bug

/*How to configure port setup in correct order AtTiny? Bug in combiler or  what is wrong here? Circuitry here has two LEDs and one analog input.  LEDs are ON or OFF depending voltage of potentiometer. Simple code below makes digital output PB1 high impedance, so LED current is too low because voltage drops. If port configuration setup is made in other order port output works fine. */ /*                     ___     D5 PB5  1|o      |8  Vcc     D3 PB3  2|        |7  PB2 A1   Voltage measurement, potentiometer     D4 PB4  3|        |6  PB1 D1   --|>--|          GND  4| ___|5  PB0 D0   --|>--| */ byte led0 = PB0; byte led1 = PB1; byte potentiometer = A1; int voltage; /* It is important in which order pin configuration has been set. Wrong order causes PB1 to high impedance, low current, output. This must be combiler bug, I think. If port BP1 setup has been made using straight to register there is no problem in order. Any other analog input port and digital port combination works correctly. */ void setup() {   pinMode(led0, OUTPUT);   pinMode(led1, OUTPUT);  // Doesn't work if this is before pinMode(potentiometer, INPUT);   //DDRB &= ~(1 << DDB2); // Alternative working setup for led1 as output   pinMode(potentiometer, INPUT);    //pinMode(led1, OUTPUT);  // Works if this led1 setup is after pinMode(potentiometer, INPUT); } void analog_input() {   voltage = analogRead(potentiometer);   if (voltage < 500) {     digitalWrite(led0, HIGH);     digitalWrite(led1, LOW);   }   else   {     digitalWrite(led0, LOW);     digitalWrite(led1, HIGH);   } } void loop() {   analog_input(); }

Topic by PaavoM    |  last reply


Grid follower robot(analog sensors and digital sensors)?

OK first of all I am under time constraint (just 4 days to make a grid follower) Ok I have built a line follower before (two ir sensors and arduino), So now the problem is ,we have two sensors which we have made using ir emmiters and sensors (which work as analog ,ie no relay) We have now purchased two IR modules which has got a relay giving it a digital output. So I am asking how we should place these sensors to get the least wobling and correct 90deg turns

Question by cthaliyath    |  last reply


Home automation: doorbell analog door phone intercom?

Answer doorbell with home phone: I would like to create a setup in which a visitor rings the front doorbell that rings our home phones.  When we answer a phone it will act as an intercom so we can communicate with the people outside the front door.  There is no doorbell system in place so I am essentially starting from scratch.  I'd prefer doing this in an "analog" fashion since we are in a rural environment with unreliable power and no cell reception.   Basically, I want to know if there's an easy/affordable DIY alternative to the several hundred dollar door phone systems I see available for sale. I would also like to install a remote electric door strike so I can lock/unlock the front door via our landline. New phone shopping: I need to buy a new home phone system anyway, since my mom only uses the speakerphone on the handsets and callers complain they can't hear her well.  Features I'd like: --Power back-up operation (handsets work even in a power-outage) --"Eco-Mode" where it consumes less power when you use it closer to the base --Excellent speakerphone on handset --Long battery life out of charger --Lightweight, easy to hold/grip handsets with large easy to press buttons and clear display There's several Panasonic models I've looked at that seem to fit the bill.  I'll admit I was initially tempted by the new Vtech video doorbell phone, but there's many characteristics about the actual phone/handsets that would make it difficult to use. I wondered if getting a Bluetooth-enabled phone would be advantageous if a handsfree calling device could be connected, just like in the car but for the home phone.  But I don't know how to do that, if it's possible. Just thought I'd mention the new phone shopping in case someone has any advice on best selections based on current home automation desires.  

Question by Pompom  


Analog Water Valve 1/2" or 3/4"

Hey guys, new here. Been looking around for parts for my project for a while now and so far have come up pretty empty handed. I am looking for some parts, or even some information on if anyone has a specific place for parts when it comes to household plumbing. i am trying to source out Variable water valves of the analog variety in 1/2" or 3/4" inlets (preferably in brass) to be controlled by an Arduino. They need to be able to handle a PSI range of 80-100psi and in a N/C state. $0-$30/each preferably Without fully giving away my project idea I basically am looking to switch out manual hot/cold water taps with electronically controlled ones. I need to be able to adjust how open the valves are so I can vary the temperature between the two pipes so that I can get an Arduino to control (with other sensors) and get a water temperature out the drain that is equivalent to bath water. (Hence why I need them to be variable and not just on/off) I have have checked local shops, asked plumbing friends, alibaba, and (of course) Google. And I just can't seem to be able to punch in the proper keywords to find exactly what I am looking for. The closest thing I can find is automatic sink tap solenoids but they require a manual set up and only output at that mix ratio, So I'm hoping that someone has a plumbing supplier to direct me to, I'm pretty much out of ideas. thanks in advance!

Topic by TheMartinDobson    |  last reply


Duel moniters without the dvi to analog switch? help please?

I need to know if i can set them up without using the dvi to analog switcher thing. please answer.

Question by bubbaman22    |  last reply


Can someone help figure out this Analog Devices chip? Answered

I recently aquired a handful of chips labeled Analog Devices ADTL 84. It's a 14 pin SMT part. Any ideas about what this is/does? I've done extensive Googling to no avail. I can add pictures later if anybody wants. Thanks in advance!

Question by Erik J    |  last reply


What exactly is the difference between an Analog IC and a Digital IC? Answered

I have to make a project at the university and I would like to know whether IC LM 3915 is analog or digital? I'd also like to know the difference between the two types of IC's.

Question by Yashknowsbetter    |  last reply


how do I fix an analog tv with a shrinkig picture?

It's an old zenith about 1995. The picture is shrinking from top to bottom so there is just a thin picture in the middle.if I hit the tv the picture will go back to normal for a very short time.

Question by raj92358    |  last reply