Question by terriruffin | last reply
Question by shanazeemi | last reply
Question by ramganeshkce | last reply
Where I can find the scopes and limitaions of a mousebot?
Question by ellamartin | last reply
Hello , i want to make a 1:1 transformer for audio (guitar pedal to power amp input).Can i use this size of transformer ? and i want to re-wire it with the type of wire in the image , how many rounds the transformer need? Thanks in advance ! sorry for my bad English!
Question by login721 | last reply
How can i get USA maps on my TomTom 1 3rd edition sat nav, the memory is built in and not a removable card?
Question by aloggy | last reply
I excavated a toy train and pulled out a 1.5V DC Motor. I have not found a use for its motion, so I was thinking of reversing the process and creating a hand crank flashlight. But should I hand crank? How many RPM would it take to generate its standard voltage? Thank you for your answers.
Question by DELETED_explosionist | last reply
Hey guys, can someone help me with this?? I have one of these sound cards, as you can see in the picture. It's worked pretty good for me for the past couple of years, but usually the subwoofer output comes either straight from the normal 2 channel stereo output on the card, piggybacked onto the cable that goes to my stereo and then that goes to my sub amp. Either that or right now I have the subwoofer amp hooked up to the line-level subwoofer output on my surround reciever, but it's still 2 channel audio. I've recently been fiddling around with my sound card, attempting to get the subwoofer output on it working. I've tried the black socket on the sound card with a 2 channel 3.5mm to RCA cord and apparently it's the rear channels as the subwoofer volume slider didn't do anything in my creative control panel, and according to a pdf I found online for my sound card, the S/PDIF socket also functions as the center/subwoofer outputs when not being used for S/PDIF. I've tried a 2 channel and also a "3 ring" 3.5mm cable I have for a camcorder (As I believe some of the cables that are SUPPOSED to go with this card, have 3 ring contacts on SOME of the cables). Alas, all I've been able to do is get a loud humming sound out of the connections, doesn't matter what rca channel the subwoofer is plugged into, it hums VERY loudly and absolutely no sound what-so-ever. Does ANYONE have any clue as to what I do to get subwoofer output from the card?!? Heres a link to the PDF describing what each port is for under "Creative Sound Blaster Live! Digital Entertainment 5.1 Creative Audio Software" and then the submenu "Installing sound blaster Live@ Player 5.1" and the next submenu "Connecting Related Peripherals" and that page describes what each port is for. files2.europe.creative.com/manualdn/Manuals/TSD/790/English.pdf
Topic by Punkguyta | last reply
I want to make this 1.5 to 10volt inverter, I tried but it didn't worked. So I want advice from expert in this that is that circute working or not? If not what changes should make it work? Here is the link to schematic http://dangerousprototypes.com/2011/03/04/1-5-to-10-volt-inverter/ Thank you in advance.
Question by njrajgelani | last reply
I need to build a simple audio amplifier for an mp3 device for my A levels, but i dont know which amplifier to use, i would like the amplifier to have a variable gain of zero to the maximum and i also have 2 0.5 watt 8 ohm speakers. I was going to use the simple amp from here, but i am not sure if i can get the full 1 watt from the speakers using that amplifier. Any help will be appreciated.
Question by COOL_Q | last reply
Hi, I am trying to build a portable usb charger the outputs 5V when input is 1.5 or 3 Volts. I found this step up converter: goo.gl/RAV9dC The spec for the converter state that the input voltage is 1V to 10V, and the out put Voltage is -1.5V to -10V and 3V to 10V. I frankly don't know how to interpret this information. It seems to me that by inputting 1.5V, the output will be 10V. So I am wondering if am right, and IF I am, then do I need to put in a 5V voltage regulator in the circuit? Thanks!
Topic by syedj94 | last reply
In the course of a conversation in the chatroom, I triggered myself to go look up old RFC's. I found http://www.faqs.org/rfcs/rfc-sidx1.html . It's kind of like stumbling across Moses' chicken-scrawled first drafts of Genesis...A couple of selected quotes,From RFC-6 (A Conversation with Bob Kahn), "BB&N; is prepared to convert 6, 7, 8, or 9 bit character codes into 8-bit ASCII for transmission and convert again upon assembly at the destination IMP." So ASCII was not a standard data protocol yet.From RFC-82 (Network Meeting Notes), "ARPA will not pay for the coffee and pastry being served, so please chip in to help me pay for it."[Edit 23 Jul 2009: Fixed URL above to eliminate spurious period.]
Topic by kelseymh | last reply
Does any know how to make a 1 way mirror with out using window film?? I do not like the quality of the window film?? Thank You all so Much!!
Question by jimmygman | last reply
I decided to go for the rc car. I'm using the 1/5 scale maxstone trying to combine it with the raspberry pi. I'm also using adafruit's pwm. I know this might be old to others but it is new to me. I am a beginner and I am very excited about it! I am open to any suggestions, comments, feedback, links, anything would be great!
Topic by SMILEY4242 | last reply
Is there a way to get around the Photoshop Elements1.0.1 installer demand for Internet Explorer 4? Answered
We have Internet Explorer 12 and my photoshop installation disk demands IE 4. I LIKE Photoshop Elements 1.0.1. Needless to say, I've used it for years. Is there anything I can do to get it loaded onto my present computer?
Question by mole1 | last reply
Hello everyone, i just salvaged some great finds i think i have a surface mount PIC16F72-1/SO and a PIC16F877A, plus a few other componets. i am wondering what do i need to be able to program and use these PIC's i have very limited knowledge on micro controlers, i am currently learning with the Arduino UNO. and help would be appreciated. and also i have salvaged some other parts kia324f "quad amp" will this work like the more commonly used op amp's i see in other instructables, ATMEL346 not sure what i can use this for. i have more parts that i am unsure of what if anything i can use them for but i dont want to bother everyone with my list =) ill try and post them a little at a time. and agian thank you in advance for your information.
Topic by omnacron | last reply
Dear Instructables community,I stumbled on to this site while looking for a DIY solution to a problem where no commercial alternative seems available. The problem? I need a dual input/output switch for my 7.1 audio system.What I found on this site was: https://www.instructables.com/id/35mm_51_Surround_Sound_Switch_Splitter_Box/I'm "OK" with a soldering iron, but I've never really built anything before, and I'm not familiar with some of the terminology. Really, the only things I have done in the past have been soldering plugs on the ends of wires and re-soldering loose connections. Even so, I'd like to build something similar but for 7.1 with dual inputs and outputs.I'm hoping you can help me make the right choices building this.My original plan was going to be just like the 5.1 version with a few most switches, but instead of the input 3.5mm jack as the source for the switch, I would just connect another switch and then connect it to two 3.5mm jacks.(See attached image)Will this work without taking a hit in audio quality?Is there an easier or more efficient way of doing this?Here's the hardware I selected initially:Switches: http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId;=10001&catalogId;=10001&productId;=76260&3.5mm jacks: http://www.allelectronics.com/make-a-store/item/SMJ/3.5MM-STEREO-PHONE-JACK-W/N.O.-SWITCH/1.htmlI don't understand most of the terminology on these parts, but they look like they should work.Please let me know what you think, I'm open to advice.Thanks!
Topic by Oriknama
I have a 80 w solar panel on my caravan, wired to a 12 v leisure battery 110 amp. my question is how do I get a 12 v dehumidifier to run for 2 or 3 hours per day on a timer. unable to run continuous as not enough solar power yet as it is still winter. I have a basic knowledge in electronics. I have not got 240 v available any help would be welcome thanks in anticipation.
Question by cossiem | last reply
how to make a microcontroller potentiometer control a servo and motors on my rc lorry for rear wheel steer?
Hi Guys, Im a keen modeller and build rc 1:14 scale trucks, I'm trying to build a trailer as many have done that uses a potentiometer which is turned when the lorry turns and the trailer follows through the tow pin, this then turns a servo that makes the rear wheels of the trailer steer creating rear wheel steering. the servo doesn't start turning till the pin is turned about 5 degrees either way, allowing the lorry to reverse easier as the rear steering won't work if not turning past the 5 degrees. On the trailer it has a detachable neck that is driven by a motor. Another servo or small motor to lower and raise the loading ramps Another motor that raises and lowers the legs to support the trailer when disconnected from the lorry. All of this I would like to be able to control separate from the lorry, so i can press a button and the legs will lower and lorry can drive away without wires going from one to the other. Ive attached some videos to give you some idea of what I'm trying to achieve This video has a circuit board that they refer to as E.T.S. Module (electronic trailer steering) This has been made by a fellow member but wants big money for them, it controls the rear wheel steer and neck detach motor, sorry its a long video. https://www.youtube.com/watch?v=ioOHjobQPho&spfreload;=10 This next video you can see the movement pause, roughly 5 degrees each way. https://www.youtube.com/watch?v=Z0MvFHVAa1w Im trying to achieve one board that can control the items above and be somehow wireless or link in with my rc gear, Hope you guys can help. Many thanks
Question by brummy2002 | last reply
Hi, I've been trying to add a LED light for my glove box, since it didn't come with any. I bought one radio shack led with built-in 1/8w 680ohm resistors to see how it was made. I read the 1/8w resistor wouldn't work and it would burn up? Using something like 1/2w would be better. I tested it with a 9v battery and I didn't feel it getting hotter. Maybe just warm? I got some LEDs off ebay many years ago and I have no idea what their specs are. They are 3mm led bulbs. I decided to make my own by using 5 1/8w 150ohms resistors. 150 ohms are the only resistors I have on hand. With the combined resistance of 750 ohms, how much voltage is going to the LED? Will I be fine with just using 4 150 ohms resistors? Will is be dangerous to use the 1/8w resistors? I don't want a fire. Will having more resistors also help spread out the heat among the resistors? I drive 4 hours a day, so the light will only be on for that duration. Thanks
Question by RoboRay | last reply
I have a powerbook 190 battery, but the batteries are all corroded and have leaked some acid. i was looking online, and i found some batteries, but i don't know the mah value of the original batteries, so i think these ones will work. it originally has 12 batteries in the pb190, so i'll be needing to get 12 of these. they will work, right? http://www.dealextreme.com/details.dx/sku.25496
Question by zack247 | last reply
What im asking is, i have a car dvd player, but the driver circuit in it is bad, so can i get a computer monitor of the same screen size (and resolution) will this screen work with it? i want to know because when i get a car i plan to install this (roof mounted) screen so i can add a computer inside my car.
Question by zack247 | last reply
I have a board I am working on, and 3 voltages i'm working with: 3.3V, 2.5V, 1.2V. I want to have "Power OK" LEDs for each voltage rail. A look on digikey shows me that 3.3V and 2.5V wont be a problem, but there are no LEDs with a voltage drop less than 1.2V... and if there is, theyre probably expensive. So what is a simple way to have a "Power OK" led for 1.2V rail? p.s. I'm using all 0603/surface mount stuff.
Topic by samurai1200 | last reply
A followup on my previous question, sort of... I have about 150 old semi used 1.5v AA batteries that don't have enough juice in them anymore to power anything significant. One can only have so many Joule thief powered LEDs, and it's a shame to dispose of them all. So the question is, what would YOU do (*Pointing at you!*) with those batteries? Thanks for any and all suggestions! P.S. Please provide an instructable if applicable :D
Question by Morgantao | last reply
WickedLasers Unleashes 1w Blue Laser Upon the Masses, or All Your Lightsaber Dreams Have Been Fulfilled
The good folks at Wicked Lasers unveiled their latest handheld high power laser: the Spider III Pro Arctic packs a blistering 445nm, blue, 1W beam that can SET YOU ON FIYAH for a mere $197.97. Wait wasn't the last one like 2 grand? Yup. Go check it out yourself, the website is loading slowly, presumably trampled under cyber foot as loads of people go to drool and purchase theirs. I'll wait. ... Yeah, it is real. Yeah, I want one too. Lasting 2 hours on a single charge, and sporting a scifilicous anodized aircraft aluminum body, this beauty packs quite a punch, apparently it is capable of setting bare flesh on fire almost instantly. Ouch. Now I REALLY want one. Who needs a gun when the tactical laser will make any offender scream and run away?
Topic by KentsOkay | last reply
Hi all! I am after a circuit that will mix a stereo source together (into mono) then pipe it out to a 5.1 speaker system. Obviously the simple solution is to wire the left and rights together and then patch into each speaker on the 5.1 speaker system. However it causes noise and other audio artifacts. I am thinking some form of op-amp type circuit to mix the L and R. That then either can be directly split between the speakers or goes into another pre-amp circuit for each speaker output (maybe even a band-pass for the sub woofer). Just to explain what this is for: I want to have music in a workshop. At the moment we have a standard radio which, to be heard the other side of the 'shop, is quite loud. Those near it then turn it down and arguments start (not quite but you get the idea!). I want to use my old 5.1 computer speaker system to spread the sound around the 'shop evenly so the volume is constant no matter where you are - a poor mans PA system.
Question by smartroad | last reply
I know that this is such a basic question but what do those values mean when selecting a resistor?
Question by blkhawk | last reply
When i tried to add more then 1 images in our instructables steps, its replace 1st image with 2nd image, if anybody know how can i use more then 1 image in our instructables steps. Please share with me
Question by Creativeweblogix | last reply
The title just about sums up my question. I am using AutoCAD 2012 to make 3D models for the intent of 3D printing. However, all the models I make in CAD are smaller then they are showing. For example, I draft a 5x5x5 cube, and export it as an STL. Then open in a a few different STL viewers, and the cub has shrunk down to about 2.5x2.5x2.5. Now, I can always just scale up my models to fit the needed size, but if I can get CAD to agree with me to make a 5x5x5 cube that will really come out to be 5x5x5, that would make things easier. Also, as a precursor, I have changed the units in CAD to match my needs, but it the models are still coming out small
Question by DoctorWoo | last reply
I plan on buying 2 of the following Hard Drives: http://www.newegg.com/Product/Product.aspx?Item=N82E16822136294 I also buy the following RAID controller: http://www.newegg.com/Product/Product.aspx?Item=N82E16816132012 Will these be compatable with eachother in a RAID 1 setup? After plugging the HDDs into the controller, and the controller into my MB(http://www.newegg.com/Product/Product.aspx?Item=N82E16813131363) is there anything else I need to? Or will BIOS automatically take care of it? Thanks!
Topic by metrogdor22 | last reply
Not the ones currently in the app store. I'm in the process of making one and it will be amazing!
Question by conradev | last reply
HI! I am wondering if .999...=1? I mean if 1/3=.333 and 1/3+1/3+1/3=3/3 and 3/3=1. So wouldn't .333...+.333...+.333...=1? But it actually equals .999... not 1. I googled this question and I got many different answers ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ For example...(someone wrote): I'm not really into math, but a friend brought something up to me today that really seemed very strange. (For the duration of this post, .999 will mean .9 repeating unless otherwise specified- just for the sake of ease) .999=x 10x=9.999 10x - x = 9x 9x=9 1x=1. .999 = 1. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Someone else wrote: Numbers are fake. They are a manifestation of our minds to describe something, similar to words. Just because we say "red" doesn't mean something is red. what is red? Languages and math are very similar. Math is universal...at least for our planet though. .999~ does not = 1. But what .999~ repeating represents, does in fact equal what 1 represents. No-one will ever be able to comprehend infinity, os its time to stop trying. Think of space and the universe. IT IS GROWING. how can it continue to grow with no stop? what is there to contain it? WE need something to contain it in order for us to understand it. We need a stopping point, but there is none. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ So who is correct? Do you agree that .999...=1? Or .999... does not equal 1?
Question by Pizzapie500 | last reply
Hi guys, I want to make a simple battery life indicator for a device running from a 1.5V battery source. I would just need a red/green LED to light when the Voltage is above a certain limit (say 1.2 V). and to turn off once the limit is reached.. Is there any simple circuit that enables me to do this?
Topic by kurtselva | last reply
I have an erector rc car and i am using all of the interior components. The system runs on 6 1.5 volt batteries, and i want to reduce the amount of space that takes up. is there any other sort of battery(s) equel to 6 1.5volts?
Question by remo2 | last reply
Hello everyone, I'd like to start off by declaring I am new to this website and have little understanding of technology as of yet. If my question has been answered before I apologize, but I haven't been able to find it in the forum. I've recently started tinkering with 3D printing as a bit of a hobby and am trying to make items that are more than just odd looking. One of the things I'd like to create is the following clock found on youtube: http://www.youtube.com/watch?v=4S2DSteBLDY Now this clock is made with Lego and its creator has labeled it as a 'proof of concept' as the 'lift' that delivers the ball, which should represent a minute, actually only counts ~55 seconds. For an actual clock I'd like it to have 60 seconds per minute and I am wondering if I can calulate the specs before I spend money on printed prototypes that dissapoint.. So using 2 Cogwheels/gears with a Chain that picks up a ball every 60 seconds (so a full chain rotation) based on an electric motor. I've found several 3-9v electric motors, but all seem to have rotations in the thousands whereas I'd expect to need like a few dozen rotations per minute(?). The clock I am trying to make is smaller than 20cm and I'd like for the chain to span a max 16cm in the final clock. Summed up: 1) How do I decide the right Gear? size/teeth? 2) What Electric motor/power source would suit a very low amount of rotations? 3) How can I time the motor/gears to complete a cycle in exactly 1 minute? Thanks in advance for taking a look ;)
Question by RayGroot | last reply
Hello, am currently trying to construct a disposable device that requires a power supply adequet to make up to 4cm of nichrome wire glow , and use as little space as possible. however, currently i am having a small issue as the output strengths of small batteries seem to be unpredictable, and i dont know wether or not these small lithium batteries will produce enough output to get my nichrome wire glowing, for instance, i have a sub c rechargable battery for starting my nitro powerd rc car's glow plg, and it says it produces 1.2v and has a capacity of 2000ma, and it is so strong that it burns up my wire immediately, but then i use my single 1.2v 3000ma rechargeable aa battery, and it doesnt do squat, now why is that?, obviously i know the glow plug battery is meant to discharge faster and allow for more power than AA. what i want to know is, will this small 1/2AA battery be enough to make this nichrome wire glow, which i might add that can be made to glow red hot with a ni-cad 4.8 700mah battery pack. and burn out with a 9v battery. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item;=310101398351&ssPageName;=ADME:X:RTQ:US:1123 this is the battery i am looking to see to use in my device, as it is small enough, and appears to have enough amperage and voltage to be able to burn the wire, but still, as i tested out with my other battery, i cant really tell without actually having it, and i dont plan on waiting 3 weeks to test out the battery. http://cgi.ebay.com.au/NEW-3-6V-1200mah-1-2AA-ER14250-14250-Lithium-Battery-/200535000934?pt=US_Batteries&hash;=item2eb0d14766 otherwise, if this alone cannot burn my nichrome wire, are there any batteries out there that are cheap (especially in bulk), are not much larger than this battery, and have a fast discharge rate, or, if there are any very small basic circuits i can use with this battery, to increase its output to enough to burn the nichrome wire, as i dont ant to exeed the size of a large cork, or roughly or (3x2x2) +/- 1cm3 lastly if i buy a smaller diameter wire, such as this one will a AA battery be enough to burn it? or the 1/2AA http://cgi.ebay.com.au/Resistance-heating-wire-Nichrome-40-awg-100ft-/170454797490?pt=LH_DefaultDomain_0&hash;=item27afe5ccb2 does the amount of ohms per meter mean it will get hotter with lesser power i have considerd using very low voltage incendary light bulbs, however due to the fact i want to make alot of these devices whiches name i will disclose, i find that they may cost me alot more, than what i could get for nichrome rocket wire. whoever answers this first , will get a "best answer" from me.
Question by oldmanbeefjerky | last reply
Hey fellas..I am having problems with joule thieves especially with the toroid part.... First time I wound my Ferrite Core and the joule thief ran smoothly... But recently I had to unwind it to try other wires which didn't work.. So i again wound up the toroid just like the first time when it used to work but unfortunately this time it didn't work... I have checked everything and found that the only problem is that the toroid is not helping to step up the voltage.. When i applied 9V across it, the LED glowed but for 1.5V it didn't. So there is a problem with the toroid.. But what it is and why is it happening I don't know..I mean for the same core and same style of winding once it worked and now it doesn't, Why ?? Can anyone help me ??
Question by Arijit Chatterjee | last reply
Hi, Is there anyway to charge battery through USB connector as well get output volts from the same port ? any 2-in-1 type adapter or hack available. They should be able to work through external charger . Any time of solution would be help full. Thanks,
Topic by RichiV | last reply