Wifi Ikea dioder

Hi everybody I want to find out if someone has already try a mi-light product such as this one https://www.amazon.fr/SOLMORE-Mi-Light-Contr%C3%B4leur-Efficace-Guirlande/dp/B012WJ02WW/ref=sr_1_3?ie=UTF8&qid;=1443648405&sr;=8-3&keywords;=mi+light Cause I wonder if it can be plug with an ikea rgb dioder http://www.ikea.com/fr/fr/catalog/products/00192363/ making them very easy to use a group of them using only one remote Thanks everyone !

Topic by david.manciet 


Gerber AR600

I am “resurrecting” an AR600 that I bought new in 1996. Been an issue using it over the years using the original Composer and ArtPath software, but managed by maintaining the XP software on an old computer; the last effort with WIN7 and a Virtual Machine - but no more - communication errors etc. are too much of a problem. I thought it was the AR600 control board, but had that checked out and it is all OK. I came across this website and perhaps someone can offer some suggestions on how to accomplish this.  Maybe I can get rid of that “ARC Station” and go with something that will run off of WIN7? (32 bit and/or 64 bit) Times and technology has changed muchly, so I look forward to hearing your suggestions…regards…Dave

Topic by S1gntist 


MGS5's iDroid - Can it be Built with Open Source Tech?

I can't get enough of Metal Gear Solid 5! It definitely deserves the 10/10 scores its received! But as cool as it would be to have a giant robot or even a Walker Gear that you and/or your enemies can pilot, I think the coolest thing to have from the game would be the "iDroid". If you havent played "The Phantom Pain" or "Ground Zeroes", the iDroid is a device Snake uses for multiple purposes. Some include: sending radio trasmissions and calling in supply drops or helicopters between the iDroid's location and Mother Base, Displaying a topographical satellite view of the area Snake is in, Organizing Mother Base staff, resources, R&D; projects, and playing music from cassette tapes found while on missions, Just to name a few. (bold font is to differentiate the uses) So is it possible to build a similar device using the open source technology of today? (minus the use of cassette tapes and a 2D holographic projection screen) I'm pretty confident that it can be done, but what do you guys think?

Topic by EngineerJakit 


Bluetooth (HC-06) with ATtiny85

Hi everyone,      I've been playing around with the HC-06 Bluetooth module for a while now and have had great success with it so far.  However, I have been using the Arduino Uno and Pro Mini, which have quite a few unused pins in my applications.  In order to downsize I'm trying to use the Atmel ATtiny85 chip.  I have used it many times in the past so I'm at least a bit familiar with its functions and limits.  For some reason I cannot get the Bluetooth module to work with the ATtiny85.  After many long and frustrating hours spent in vain, I decided to ask you all for help.  Does anyone know of any good tutorials or code for using the ATtiny85 with the HC-06 module?  It would be great if I could use the app Ardudroid to control the ATtiny85, but any help would be greatly appreciated.   Thanks ~Dudes

Topic by dudes   |  last reply


Intel Edison Base Shield compatibility

Hi everyone, I was selected for the IoT invitational of Intel + Instructables and I as I was going to start testing the sensors I received, I noticed that there was no base shield for the sensor connections included in the package. I suppose the rest of the chosen participants didn't receive the base shield as well. Since the local stores near me do not have that shield (http://www.seeedstudio.com/wiki/Grove_-_Base_shield_v2) I wonder if other Arduino compatible sensor shields can be used on the Intel Edison expansion board, since it operates at 1.8V and I don't want to fry it. Thanks in advance!

Topic by plugable 


Removing a teeny/tiny iPod/iPhone drilled screw

Hello, I have been doing some repair work on an iPod Touch 3G. One repair I'm having to perform is the power button which is totally unresponsive. This required removing some very soft tiny screws at the bottom of the device. Unfortunately, one didn't survive the screwdriver and quickly chewed up, which means I've had to drill it using a drill bit, which took a surprising amount of effort. The problem now I have is extracting the final stem which is still screwed in. The stem isn't flush with the metal but it's not far off, making it hard to grab using pliers. I'm looking for some suggestions how to remove it. I've read that cutting a thin screwdriver in half and gluing it using super glue is a way. Another way seems to buying an extraction set but the only one I can find in the area looks far too big (despite having a precision piece). Thoughts? All suggestions welcome.

Topic by skezza   |  last reply


Remote controlled concrete trowel machine

Hello I do not know how to build this type of machine. I was hoping someone in this forum would be able to build one and share it with this community. I do not know if the machine is under a patent or not. If it is under a ptent perhaps certain aspects of it are not.The company that was building these was called Tibroc in USA. But they are no longer around. Anyway if someone can help me out and build one and share it so that I can build one that would be great.

Topic by dimatek 


Wired to wireless keybord conversion

Hello, It happens to have a wireless mini keyboard with touchpad, like the one in the photo ( not this model, but something like this). The problem is that I did a terible mistake and I bent it a litle (some milimeters) and after that it keeps sending repeated characters. I do no think I can fix it. I like to convert and keep alive old things so I had the idea to use the RF modules of the keyboard and make an old PS2 or USB keybord wireless. Do you think that there may be a chance I could do it? Hope you will come with some ideas

Topic by dentalan   |  last reply


Wia - Cloud infrastructure for IoT

Hi All, This is my first post here. I would like to introduce you to my startup Wia (http://www.wia.io). We provide cloud infrastructure for Internet of Things devices.  We would love for you to signup and to start building applications around our platform. If you have any questions, ask away! Cheers, Conall

Topic by conalllaverty   |  last reply


What is the duration of Instructibles login sessions

Hello, I visit the Instructables website about 2-3 times per month (every 10 days or so), and it seems like EVERY time I do I need to login again. Even "Amazon" - and they're a commercial site - is better at "remembering me than Instructables. This is not actually a technical problem, but more of a question about Instructables policy (and also, it's a site complaint). (I can almost guarantee someone's going to misread my question so I'll say again... NOT a request for help. Yes I have cookies and JS on, and yes I'm using a good browser, Chrome.) It seems like I have to login every 4-7 days, possibly sooner, which is fracking annoying. If  there a better place to post site feedback, please be gentle, I did not find it before posting.  Thanks. (And despite my complaint, I love love love this website, it's in my top 5 favorites).

Topic by scottinnh   |  last reply


Reuse Fingerprint Scanner from Lenovo W510 Laptop

I have a Fingerprint reader from a Lenovo W510.  The model number of the circuit board is 48.4CU13.011, which seems to be shared by both my Lenovo and another Fujitsu laptop.  The fingerprint reader is a spare part, and I thought it could be cool if I could hook it up to a PC by USB.  When connected to the laptop in question, it shows up as a USB device: UPEK Touchstrip TCRD4C - USB ID 147e:2016 The chip is connected by an 8 pin ribbon cable to a larger ribbon cable which also connects to the touchpad.  Looking at the board under a magnifying glass, it looks like there may only be 4 of 8 pins connected to the ribbon cable connector.  The chip on the circuit board appears to be a TCD50 fingerprint reader controller, made by UPEK or possibly Authentec (did Authentic take over UPEK?) I was hoping someone might have some experience wiring this board up to USB, or could point me in the right direction to figure out what pins go where.  I looked for datasheets, schematics, and pinouts without success, but I don't have much experience searching for this type of stuff.  I'm pretty handy with a soldering iron, so I feel confident that if I knew which pins went where, I could get a cable hooked up. 

Topic by Jozer99   |  last reply


Digitizer not working after replacement.

Hello, My wife accidentally crashed her phone digitizer (Samsung Galaxy Core 2 (G355H)). Its was still working, but you know... Being the type of man which always desire to fix something - I put myself to that mission. So I bought a new digitizer from one of eBay sellers. And sadly after replacing... the new digitizer was not working at all. Bringing back the old crashed digitizer to test it - it was still working. Tried to update firmware. Still the same. So I decided that It was faulty and asked for seller to resend the item. The new digitizer (number 2) came. Still the same stuff :(. Started to google. Found the solution on the internet. I have to let the phone boot with the old digitizer, when the boot is complete, need to remove the lcd and digitizer, replaced with the new digitizer (the phone has to stay on). And after that connected back the lcd... and its works... but sadly (as the author of this solution) if I reboot the phone - will not work again. PLEASE... Show me the direction what I need to do or where to search the answer

Topic by VadimL3   |  last reply


Soldering Survey

Hi there. We’re Solder Otter, a team of recent engineering graduates from the University of Waterloo in Canada that is redesigning the soldering iron so soldering electronics can be safer and simpler. You may have seen the survey we posted back in 2013 when we first started working on Solder Otter. Since then, we’ve built prototypes, won pitch competitions, and learned so much about makers and soldering. We’ve received a lot of positive feedback, so we’re pushing forward with the project beyond graduation. We have another survey. It’s similar to our last survey, but this one is designed to help us refine our prototype into the best soldering iron for you. We’re reaching out to makers and hobbyists across several forums because we want to learn about your soldering experiences, preferences, and needs. We're also considering designing with children in mind, so if you have any input in that regard, we'd love to hear that too. If you can spare 10 minutes to fill out our survey (link below), we would really appreciate your input. Thank you! If you have any questions or comments feel free to reply to this post or send us an email at info@solderotter.com. Link to survey: http://goo.gl/forms/Uep9Qd0GiM

Topic by solderotter   |  last reply


unidirectional audio speaker. Design discussion

I was thinking of designing a unidirectional speaker driver circuit. As far as I know ,I need to drive the speakers with audio signal with ultrasound carrier wave... I thought of making a circuit that generates 20/16 Mhz (1.25mhz) square wave? using 4060 ic and 20 mhz crystal and using optocouplers to torn on and off the speakers at same frequency. do you think it is going to work?

Topic by Suraj Grewal 


115VAC low current fan speed controller

Greetings, I am fairly new to electronics, and have mostly worked with DC circuits so far.  I have an AC fan I want to use to make a carbon filtered ventilation fan for my soldering station.  I can do this with a DC circuit and DC fan, but when researching how to do it with an AC fan I came up with more questions than I started with... The fan I have is a Nidec TA450AC model A30122-10.  It is about 5x5x1.5 inches, and rated for 115VAC, 50/60Hz, .26/.21A.  I found data on the fan here: http://http://www.nidecpg.com/fanpdfs/ta450ac.pdf In my research so far it seems there might be three solutions: 1> Use a TRIAC/DIAC circuit, 2> Use a MOSFET circuit or 3> Use a microcontroller/PWM circuit.  There seem to be benefits/drawbacks to each method, and I don't know which method to choose, or even if I'm headed in the right direction..  I don't know how to tell if the fan is  single-phase, triple-phase, induction...  ugh.  I am looking for an inexpensive solution I can build myself,  that performs well. Can anyone help me find the right solution for my application?  Or at least point me in the right direction? Thanks much, doval

Topic by d0val   |  last reply


Y2000 or Y3000 USB Commands

I am working on a data acquisition for a bird. I found a camera called Y2000, It is pin hole camera and very small. I looking for the USB commands to control it (basically to start and stop video recording).  Does any one know where I can find the USB commands? I will be using the Arduino Pro Mini as the computer, an I might need help in programming it. when the time comes. Right now I in the design phase. Rocket Nut

Topic by Rocket Nut   |  last reply


Plasma Speaker Kit

Hey Instructables, We're StudentRND, a group of students in Seattle, WA that build cool stuff over the summer. We've taken our time over the summer to build a plasma speaker, and now are offering kits on Kickstarter! (As seen on TechCrunch and Physorg) What's a plasma speaker? It uses an electric arc to vibrate the air to play music! View the Kit <br>

Topic by studentrnd   |  last reply


Sulfur and Tin did not mix ... (trying to make DIY phosphor)

Hi ...Here is an other "failed experiment" ...I tried to mix Sulfur and Tin with the hope to make a ZnS phosphor ... (Yes, I know ... I confused Sn and Zn)So, indeed, when I poured some Sulfur powder over my melting Tin, the Sulfur melted, boiled and vaporized ...Ok. Now my question : If I pour some Sulfur powder over melting Zinc, will Sulfur vaporize, or will I get some ZnS ?(actual question : is there a simple non industrial mean to make ZnS phosphor ?)=o]

Topic by chooseausername   |  last reply


What is wrong with my Uno r3?

Please help.  I have 5 UNO R3 clones and I can't install them on my computer. When I plug them in two red LEDs light and the board comes up under Other Devices as a USB V2 device. I've tried every driver I can find, but none are recognized as suitable. I've tried 5 different boards, two computers Win 8.1 and Win 7. I've swapped cables and still nothing. I have a feeling it could be a lack of a bootloader on all the boards. How would I check if this is the case and how would I fix it? I have managed (easily) to install an Arduino Mega with no problems and I've managed to install many other devices so it's not a case of too dumb. Just a little dumb :-) Any help would be very much appreciated.      Stu

Topic by StuartB4   |  last reply


Need a 30 watt "LASER"

Looking for an inexpensive laser cutting/engraving system. I will be taking it apart and  customizing it to fit onto another machine.  Currently, we have a rotating blade to cut sheets of material, but this set-up causes many issues.  A contact free solution would be best.  So I want to mount the laser carriage above the cutting area; the rest of the laser parts will be contained in a metal cabinet under the machine.  The laser would need to be able to travel 12-16 inches in 1-2 seconds and cut through 1-5 mil paper/poly material. I have a fair amount of experience with lasers, I have know how to sight them in and understand the technology.  We currently have 45, 100 and 400 watt galvo head lasers, as well as a 90 watt XY laser set-up. So, what website would you direct me to, to purchase an inexpensive laser system?

Topic by benjaminleebates   |  last reply


microcontroller using Nuvoton and lm35

Hello, anyone here know how to use Nuvoton NUC 140 VE3CN? I get some trouble on connecting the pin and using what kind of library to activate the pin. We already success in compose the main.c but the data can not show in the LCD. I got text like this: warning: unknown conversion type character 0x20 in format [-Wformat=] Thank you in advance

Topic by diah ajengS1 


Positions available at Instructables (October 19, 2018)

Working at InstructablesIf you don't see an open position that fits you, please don't hesitate to drop us a line and say hi. We are always actively building our network of curious, creative talent with a passion for making. To introduce yourself, please send your cover letter and resume to auctoramentum at instructables dot com with a fun, robot-related subject line

Topic by ewilhelm 


emergency lighting system

We're planning to do an emergency lighting system and we want to add some twist on it. What do you think should we add? (it's like making it also charger or such) Plsss, help us. :)

Topic by imatrianidar   |  last reply


From ipod dock to normal speaker, Please help me.

Hello there, i have a old ipod dock an i want to make a normal speaker of it. Can someone please send me a instructable link or tell me how to do it. it will be appreciated. Thx allready. Greetings from the netherlands.

Topic by Coolek   |  last reply


iMac G5 external monitor

Hi there! I'm currently working on a project, and I really need some help from you guys. What I'm basically trying to do is putting a Raspberry Pi with Retropie installed into a iMac G5 case (24'') and use it as a Retro-Gaming-Machine. Things I already have: - iMac G5 24inch - Raspberry Pi Model B+ with RetroPie installed - 2 SNES Controller with an Adapter to USB - Cables and stuff And now to my problem: I want to use the iMac's LCD panel (Product number: LM240WU2), which of course requires an inverter as well as a controller board. The inverter is stuck to the panel, and can be used I think. But the controller board seems to be integrated into the Logic Board, so I can't use it. I already found a suiting controller on AliExpress, but unfortunately it's not available. So I'm kind of running out of options where to get one. Does anybody know where to get a working controller? It shouldn't be too expensive, because otherwise I could just buy a 17'' or 20'' iMac G5 and use it, because these are built a bit differently and work just over DVI. I would love to make a Instructable out of the project, in case I'm able to solve that Problem! Thanks, Nick

Topic by SaiyajinNick   |  last reply


How to make a program like Disqus but decentralized?

I have had this idea floating around in my head for some time and I was wondering how someone would program a new decentralized overlay comment system that would use an add block like program to block out the comments on a webpage and display a decentralized alternative to the website controlled comments. I was thinking that it would be a web browser add on that would add the functionality. and all of the comments would be decentralized and stored on the users of the comment program computers. What programming languages would be needed to complete this task? How long do you think something like this would take to code? Please tell me you thoughts in the comments! I know this would not be super easy but i can't keep it off my mind.

Topic by sonic broom   |  last reply


High Speed Wireless for Fencing Strip

I've had the idea of trying to create a wireless fencing system (like what they use in the olympics) for my club, and was wondering if this is possible using AVR's and available (and fairly cheap) wireless tech. For those of you who don't know what this would entail because you do not know fencing, I would have to have two transmitters acting simultaneously that could send out signals checking for touches on a blade that would be received well within 40ms of eachother (the double touch time for epee). I would also need them to be able to send out two different types of signals (for on and off target for foil and sabre). I found online a project based off of rfid tech that claims to accomplish this and was wondering how effective this route might be? http://www.worldacademicunion.com/journal/SSCI/SSCIvol02no02paper03.pdf

Topic by nkraus1   |  last reply


Replacing switch and extending them.

I have this extension cord from panther, http://www.panther.ph/wp-content/uploads/2012/05/PSP-0211.jpg. Now, I am planning to replace its rocker switches to toggle switches and extend it because of a wooden table project. This wooden table will have its power control panel mounted on its front and the power outlet will be hidden inside the table. My idea is just to copy its wiring for the new switches once I acquire the materials needed . Here is its inside btw. http://imgur.com/xOHhg5i.  My problems are I don't know if this idea of mine will work or if it will, what kinds or specifications of toggle switches and wires I'm gonna need. Once I thought that I could just make an ordinary multiple outlet/extension cord with individual switches but I need the panther's features. So that I wouldn't have problems in breaking the appliances connected to it due to some electrical problems. I have almost 0 knowledge when it comes to electronics.

Topic by l0rens13.   |  last reply


Automatic light switch with timer and Arduino

Greetings! I need to set up a test environment with End of Day lighting (EOD). I am a rose breeder and I read some interesting articles on the use of far-red light (740nm) followed by red light (660nm)  for a short while at EOD. The goal is to lengthen the stems of the roses by giving them EOD light in a sequence. What I need to achieve is that by dusk (EOD) the far-red goes on for 10 minutes and then off, followed by the red light for 10 minutes and then off as well utill the next evening.  I have the following hardware: Arduino's (Uno and Mega) LED's (red and far-red) Lightsensor two relays to power the LED's transformer(s) resistors etc. However: I am not a programmer. Can somebody help me with the code needed for this trial? As far as I can see it should be reasonably straightforward. Many thanks, Peter

Topic by PetervdPol   |  last reply


esp8266 WiFi module - stand alone?

So I've been looking at this esp8266 wifi module, which seems to be a popular toy for Arduino users.  I myself am one of those Arduino users and so I bought a couple of these to play around with.  So far they work great with the Arduino, but I read somewhere, I think it was make.com, that these modules can actually be programmed to be used without the Arduino or other external microcontrollers.  I simply wondered if this was in fact true, since I can't seem to find any evidence of it being done.  If it is true, does anyone know of any good tutorials or instructions on how to do it?  I just want to be able to turn on and off a single LED via wifi without using an Arduino or other external microcontroller.  Any tips, links, suggestions would be very welcome.   Thanks ~Dudes

Topic by dudes   |  last reply


Bluetooth Speakers

Hello everyone... rookie here.  I have been looking at the Bluetooth speakers instructables, but I was looking to take it another step.  I need to be able to also transmit to another speaker 30-40 feet away from the "master".  What would be the best way to approach this? Thanks, Tony

Topic by TonyH14   |  last reply


Why don't AC adapters fry?

I tore open an AC adapter to find out what I was doing wrong in my own power supply attempts. Before any other components, and connected directly to the outlet prongs, was a transformer. I know that it drops voltage and (by ohm's law) the amperage as well. But how does its survive the process? Why doesn't it have huge amounts of waste heat the way a current limiting resistor does? Why doesn't the primary coil of the transformer--effectively a tiny wire short circuiting an AC outlet--burn up? I'm certain this has something to do with the impedance of an inductor, but I just can't figure out what!

Topic by TheCorsairMalack   |  last reply


Replace just 1-2 bad li-on cells?

I've got a fairly new DeWalt 20V Lipo Battery pack that got a bit of water inside it's case, causing 1 of the 10 cells inside to go bad. Pertinent info: * Battery pack is configured as 5x2 (5 series stages of two parallel pairs each) * Other cells are in near-new condition. * OEM Factory battery exact matches are rare and quite overpriced.  (1500mah x 15A discharge rate @ $10-20 shipped.) * Due to improvement in battery tech, I can get batteries that outperform OEM in every spec for 30-40% of what the OEM costs (2500mah x 20A discharge rate @ $4-6 shipped.) * The battery pack is always charged on a cell-balancing charger. Assumptions:  (Correct me if I'm wrong here, especially on the 2nd one) * The partner cell to the dead one is now suspect, due to being undercharged (down to <.1V)  by it's dead partner. * I should be able to just replace the bad cell and it's partner with the higher spec'd batteries and it shouldn't be a problem Is this workable, or will having non-identical cells for 2 of the 10 cells cause problems?  (I'm totally fine with the pack only being as strong as the weakest link, and only getting OEM performance out of the replaced cells.) I'd rather not have to replace all 10 cells, but I'd rather do that than replace 2, and -then- have to replace all 10 because the combination didn't work.

Topic by SvdSinner   |  last reply


LED Grow Lights

I've been an avid rosarian for many years, and am finally getting around to trying to grow miniatures indoors. I've been looking at some of the commercially available LED grow-lights, and they're insanely expensive, not to mention bulky and unattractive. It occurred to me that a lot of the info here would be highly relevant to such a DIY project. What I'm wondering is how many LEDs would be needed to produce around 2000 lumens in an approximately 1-foot square for one rose? I'd gladly listen attentively to anyone who can comment on this with some degree of authority.

Topic by Cavallo   |  last reply


Arduino programming help: Do two things at once!

So I'm making a new project but I ran up into a little problem with the code. So this is what I want: Arduino check to see if A0 is HIGH, If so, turn on LED for 5 minutes. If, during any period within the 5 minutes, if pin A0 goes HIGH again, then start the 5 minutes all over again.  So basically every time pin A0 is HIGH no matter when always start a new 5 min timer. This is what I had. . . void loop() {     pirstate = digitalRead(pir);     if (pirstate == HIGH)   {     digitalWrite(LED, HIGH);     digitalWrite(relay, HIGH);     delay(pulse);   }    else   {     digitalWrite(LED, LOW);     digitalWrite(relay, LOW);   }   } The only problem with the above code is that it doesn't do anything while waiting the 'pulse' time. I need it to be able to within 'pulse' time check again to see if the pin is HIGH, and if it is, start all over again with 'pulse' seconds. Thanks guys! Your help is invaluable!

Topic by HavocRC   |  last reply


What does mpsa transistor mean?

I have a project that requires mpsa13 transistor but the local electronics shop only carries mpsa12 i don't know what is the difference between the two, what are some alternatives or do they have different names in different country. thanks in advance

Topic by MaxF5   |  last reply


electronic diagram to pcb

Hi i need anyone that can help me with this diagram,i think its okay,at least thats how i have it in a breadboard and it works,basically its a 555 timer delay on (5secs) and then the buzzers beeps reallly fast,seems simple but one bad conection and it wont work when the pcb arrives,(it happened already,)the not conected pins seems crazy maybe but it works i have everything in breadboard,i hope someone can help me please thankss have a great day :)))

Topic by NelsonN2   |  last reply


Control bulb with inductive proximity sensor

Please see attached diagrams in my other message below. I am using an NPN NC inductive proximity sensor (specs attached) to control a light bulb. The bulb is normally on and goes off when metal is detected. It is a 12v/21w bulb, powered by 12VDC. I have placed a heat sinked TIP120 NPN High Power Darlington Transistor 60V 5A TO-220 , a 2.2K 0.25W resistor and a 560R 0.25W resistor as shown in the circuit diagram on the right. Please ignore the left diagram for the LED. voltage readings for sensor with no metal detected: Between brown and black: 12.06/07V & -12.03/04V. Between blue and black: 0.0033V & -0.0032V (3.3mV & -3.2mV)  with metal detected: brown/black: -0.6/7mV & 0.7mV  Blue/Black: 11.96/97V & -11.93V Although the sensor is powered and detects metal ok, the bulb stays on. The polarity of tIP120 is correct and gives out heat ok. I can't figure out what I'm doing wrong so could you please see an obvious error?? thank you

Topic by nathanimate   |  last reply


Making the mobile app better

Wouldn't it be great if the mobile app could do all that you can do via a PC or Mac? For example use the forums....or post a message into a selected forum. I think it would be good if the mobile app displayed all the contests and challenges instead of missing some out. I am sure that once upon a time I could use the mobile browser to at least view the main site that way. Now they cleverly detect that I am in mobile device and do not display the same content. Diesanyone else want the mobile experience to match the desktop experience?

Topic by Gregarious   |  last reply


Old Dynacharge battery Charger good for other tech?

I Picked up an old Dynacharge NiCd battery charger at a local Garage sale. What I am wondering is this, Can I use this old wall plug battery charger for the current NiCd Batteries? And If so.....wait for it.....Can I extract the guts from it and use it to make a self charging power bank? can I hard wire a charging circuit and a discharging circuit onto the batteries at the same time? would I need to put diodes in there? Is this even worth doing? I know that I can get all kinds of circuitry from online sources that can do the trick, but I'm wanting to use as much old stuff as I can. Input please?

Topic by OculumForamen   |  last reply


LM3914 Battery Level Monitor

I am trying to make a Battery Level Indicator using the LM3914 IC. The problem I am facing is... where you see those 3 LED's my voltage increases on the pot, where as when the LED's are all the way on it decrease across the pot. I am using a 9V Battery where I want the red led to show depletion  of battery life around 5 or so volts  how can I achieve this. Can someone please help me with this?

Topic by dominick.j.pezza   |  last reply


Advice for newbie - rotational art?

Hi there, A few years ago I picked up a lovely ornament - a crystal ball contained within a conical spiral wire thing.  When suspended you could manually spin the wire to create the illusion of the crystal ball falling (very poor explanation but hopefully you get it?). Anyway - I've always wanted to automate this, so that you can hang it up in the conservatory and enjoy a nice cup of tea whilst this thing continues to spin. My simple idea was to have the ornament hung on a basic motor (solar powered / using a solar powered battery would be even better). And that's where my idea stops.  I've searched online and remain baffled by the plethora of motors and accessories that I might need. In very simple terms can anyone advise what: electric motor I need (the ornament is probably around 1kg, I'd like it to spin at around 60 rpm?) whether I can power it via solar (ideally to charge a battery so that I can have it working at night when there is no sun!) Any other helpful tips? First time on this place - looks incredibly interesting and fun. Thanks in advance, Jamie

Topic by Jamie_Jumbles   |  last reply


elwire sound activated inverter mod need help

Hello guys, ive been working on my project suitcase boombox and was searching for cool thing that  i might add to it and found this thing called elwire, so i bought it and now im wondering if theres any way i could hook it up straight to my audio amplifiers channel or something like that instead of using the microphone on the elwire inverter. here is the elwire inverter the amp im using: lepai

Topic by VytasŽ   |  last reply


FM transister

How to build an fm transister on an breadboard. I am a class 7 student . and science exhibition is near pls help me

Topic by 2illickans   |  last reply


How many strands of 17 gauge wire twisted equal a 12 gauge wire (approx)

Hi,  I need a 12 gauge wire for the positive side of a small perimeter electric fence. However the only size aluminum wire they sell locally and I bought was 17 gauge wire. My thought is to twist the entire length of two or more strands of the 17 gauge wire together to equal the 12 gauge wire (approx)  How many strands of 17 gauge will it take to do so? One more related question while I'm at it. Does the twist have to be a tight twist or can it be a loose twist? Tight meaning a lot of twists per foot, loose meaning something like 4-6 twists per foot. tia - chase -

Topic by -chase-   |  last reply


montreal area coilers

Okay guys, good news: ive started the Montreal area tesla coil club. if you live in the Montreal area and want to join, please say so. our first project is a low power solid state tesla coil. pm me to join!

Topic by tech-king   |  last reply


Code to draw Graphic on nokia 1202 LCD (STE2007 driver)

I've bought a nokia 1202 LCD recently (very nice one, have their pinout ready to use, micro SD headers and a regulator). I've tried hard to find an library for it, and finally found one that's usable. Now printing text is no longer a problem, but graphic is one big mess. Can anyone help me with it? I've already make the image into an array, but stuck with the "display the logo" part. Apparently, the number did something, but I don't know what. Everytime I tried to change it, the screen output something different. I've included the library (which I downloaded it somewhere on the net) and the code I've modified. Thanks in advance, and sorry for my terrible english.

Topic by Mad Fox   |  last reply


Is it possible to make a specialized spark gap device that operates similarly to a transitor?

I have a serious issue with utilizing an H-bridge to switch polarity of high voltage electromagnets. The voltage is roughly 110 DC rectified from mains. Every mosfet I use has exploded when I tried to switch the mosfets. I tried using relays but they keep arcing and tripping my breaker. I would very much like to know if it was possible to make a spark gap that works similar to a NPN transistor.

Topic by 50ul84n3   |  last reply


remote controlled light - revisited

Hello, Instructibles gang…. I originally posted a similar question over the weekend, and then got some feedback telling me that there wasn’t enough information to bring in worthwhile responses. My intention wasn’t to be secretive.  Rather, it’s a project that’s still in the planning stage and there aren’t yet many specifics. But I think I can still flesh it out a little bit, and hopefully gather some more specific suggestions. I’m planning a sort of a scavenger hunt thing coming up in October. Most of the stops/stations will be fairly straightforward “orienteering”-type scenarios: “20 paces at 250 degrees,” “north to the hollow stump,” that sort of thing. But I still want to mix it up a little bit. One of the ideas that’s swimming around in my noodle is that, at one stop, folks will be told to “push the button.” It will be dark, so they’ll have to hunt for the “button”… basically a doorbell… and maybe secured to a tree (in such a way as not to harm the tree). When they press the button, a light will be illuminated at a short distance, leading them to their next stop. I know that I could easily do a simple circuit with actual wire, but it would be far nicer to achieve the same result wirelessly… and even though I’m not very electronics-savvy, I imagine it would also reduce the problem of resistance in the circuit. This only needs to operate over a relatively short distance… almost certainly less than 100 feet… probably much less. And while it must be able to operate out of doors (a woodland trail in a rural/suburban park) it only needs to last for a few hours. An LED… or maybe a chirping sound effect… something that would draw seekers from one spot to another. Thanks for any suggestions. And please let me know if more information is needed.

Topic by Purple Chez   |  last reply


how to connect game consuls to a smart tv

I have a samsung led smart tv and want to connect games consuls to it, can this be done?

Topic by Joe Revie   |  last reply