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Can I use Arudino Uno instead of  the Arduino pro mini 328?  I am interested in the following Project so please help

Topic by RanjitE1    |  last reply


Can some help me to give a circuit diagram in heat sensor cooling fan using only thermistor, potentiomet and resistor. 

Topic by vcente.capio.1    |  last reply


Hai sir,          i am udhaya engineering student.i have one doubt ............ HOW TO INSERT A PROGRAM IN INTEGRATED CIRCIT?         please send me about this details...

Topic by udhaya anandh    |  last reply


Hi again it's me i was wondering if there is anyone out there who can help me. i'm trying to learn about transistors resistors... etc. and how they work i understant the resistor color code but that's about it. please help me i want to learn this stuff.

Topic by rickick    |  last reply


Hey everyone does anyone know any good ideas for making a portable ham radio transmitter and receiver that can fit inside an iPhone case (the cardboard case you buy them in)? It would be good if it was a kit, but it would be better if it can be made using a breadboard and other bits and pieces. Anyone have any ideas?

Topic by Unicorn_Boi    |  last reply


I am currently building an RC hovercraft, I plan to use a single 12 volt 2.1 amp hr lead acid battery to feed both the lift fan for the skirt and the power motor for the drive. However the fan for the skirt is 12v 0.3 amps. How can I reduce the feed to the required amperage with out affecting the other feed from the same battery that will power the drive

Topic by Seafarer77    |  last reply


I want to cover a stairway.  The motion detection camera that is in the library here is a very good start.   I want to add the following functions. 1. long battery life 30 days min. 2.. Rotating photo storage.  i.e. when the memory is filled up, the camera will overwrite the oldest photo. 3.  Date and time stamp A unit like this could be left in place for a long period and only accessed if something has happened that need to be checked.   

Topic by jscanlan    |  last reply


I am currently working on a project that requires energy harvesting ,so i decided to use electromagnetic induction for the purpose. However I can not decided how to design my magnet and coil combination. All i know is i want 2.6-3.3v and 26mA for round about 4 ns. The setup in brief required a movable permanent magnet and a stationary coil. The moment of the permanent magnetic is like a oscillating pendulum just for once but with a sleed of say about 15km per hours. So can you please suggest me how should i start designing. thank you

Topic by SiddhantS6    |  last reply


Http:// wonder if anyone can helpI want to make a bike light using CREE leds (*4) and have spotted the bflex (see here - - I was going to go for the UIB2 version) as it has battery monitoring facilities built into it. You set two voltage values v(low) and v(med). There's a connection on the board V(stat). S is the voltage from the battery.V(stat) = 0 if S is higher than v(med) => State 1V(stat) = 3.3V if S is between V(low) and V(med) => State 2V(stat) = alternates 0 and 3.3V between 0V and V(low) => State 3So I was thinking (of displaying this via 2 LEDs (green and amber))State 1 - green on, amber offState 2 - green off, amber onState 3 - alternating between green and amber.I was hoping to combine the LEDs into one bicolour LED. If anyone has any cunning plans or improvements they'd be appreciated.. whatever it end up with though it mustnt use up too much battery power.

Topic by EXM    |  last reply

Is this an electronic cigarette ?

A friend of mine found this object in her son's room, he's 16 years old. She think it is a smoking device or something (electronic cigarette). Thank you for any help.

Question by NovakD    |  last reply

Electronic Disabler?

Is there something that exists that can wirelessly short-circuit electronics? I haven't found anything on Google. I'm pretty sure i read something about a guy making something called an F-Ray that did this, but that was in Tesla's lifetime I think. In short I want to build something that can over-voltage or short circuit electronic devices/machines. I don't care if it ruins them or temporarily disables them.

Topic by Jordo    |  last reply

For electronic n00bs

This topic is made to help all who don't know a lot (or even anything) about electronics. Here people can ask simple questons without opening a new topic.

Topic by Dantex    |  last reply

Electronic Level

I need to level a 32' long machine. Lengthwise is easy, but along it's width is a pain. I have to check in about 8 places along the machine. This takes awhile to do with only one precision level. Since these levels are about $120 each it is not realistic to buy eight. I need to save time and effort. I was thinking of trying to build a bunch of electronic levels to place in their designated areas so I can find the "level" of each area without moving a level to it. Any ideas?

Topic by Monger    |  last reply

Beginner in Electronics? Answered

I am a complete beginner when it comes to electronics. I would like to build functioning machines eventually, so does anyone know how exactly I can get started? Are there any specific books? Thanks, freeza36

Question by freeza36    |  last reply

Electronic schematics?

I need a free electronic shcematics Program that checks my circuits.

Topic by OrIsIt    |  last reply

Electron gun

How can we build a heater for electron gun? can we use tungsten filament of lamp for heater ? please tell me how to build heater?????????????????????????????? thank very much

Question by esfand_mhs    |  last reply

Electrons and Photons? Answered

Under the right circumstance in a synchrotron for example, electrons accelerated to very high speeds can be made to give off photons. Apparently to preserve the laws of conservation of momentum and conservation of energy. i assume this means the photons in this case have mass to allow the electron to obey these laws so does this mean: 1. Electrons contain the photons 2. Electrons generate the photons 3. Photons are spontaneously generated by some other effect 4. The electrons are dragging photons along with them. Why do i have a feeling I am not going to understand the answer, if I could I probably wouldn't have asked the question!

Question by rickharris    |  last reply

Electronics help

I need an easy way to distribute power 2 way and when the on button is switched the correct goes one way and when off then on again it goes another? Thanks

Question by Camyo    |  last reply

Electronics Book

I want to start a few projects using a Arduino board and know what I'm going to do. The problem is I do not understand some concepts and parts with electronics. I was woundering if anyone could recomend a decent Electronics Book to help me grasp concepts and what specific parts do. Try to keep it in the $20 range because I have a gift card to amazon. Once I document my project I'll do an instructable.

Topic by acer73    |  last reply

Electronics Source

I know that there have been posts all over the place that list sources for electronics components, but I was having trouble finding them, and then I figured it would be helpful for everyone if we had one place for them. So, please post links to your favorite electronics components sources. I know I could use them! Thanks Rick

Topic by mrmath    |  last reply

Electronic Butterfly

Dear all: Have anyone trying to make an electronic flapping butterfly with flapping pattern that resemble an actual butterfly? Can you shine some light on me if you've attempt it before? If not, do you have any suggestion? Phillip

Topic by Gardenerprune    |  last reply

Learning electronics

I’m looking to learn more about electronics. Making circuits and stuff. Does anyone know a good way to take classes. I know I want it interactive. I want to be able to ask questions. So I can really learn the subject. I have done the basics here. And I watching utube. I find both very limiting. Any thoughts is appreciated

Question by Cumberson    |  last reply

An Electronic piston

Please guys I need a small 12 or 24 volts  device  that can give me a forward movement when it's powered on and backward movement when it is off or vice-versa. Just as pneumatic pistons work, but I need it to be electronic. please help it is very urgent. thanks

Question by victorious4live    |  last reply

electronics program??

Hi guys, as you can tell by my name im a quite new to electronics especially when its resisters and capactors , does any one know of a program that i could use to create circuits and try out ideas without blowing my self up or having a shocking time.???

Topic by TotalNOOB    |  last reply

Books on electronics?

Hey guys, ive been a big fan of the site for a long time but have only just signed up. I just wondered if anyone could recommend to me some good books/guides on basic electronics and circuit building. Iv always been interested in the way electronic devices work and after viewing some cool looking instructables on here decided i want to try and learn about how to make them. It is also fueled by my interest in physics which i want to pursue in university. Any advice would be much appreciated, thanks.

Topic by The Stans Mysterium    |  last reply

electronic "key"

One more forum post and then I swear I'll take a break!!! I would like to build a sort of a "secret box," where access would be had through a sort of electronic "key." A few specifications: (1) the box would be permanently out of doors, and (2) the "key" would be simple enough that I could give interested parties the schematics and tell them to make one. I'm thinking a USB connection would be a natural, but I'm not an electronics person, so I'm open to all suggestions. Thanks!!!!!

Topic by Purple Chez    |  last reply

Beginner In electronics

Hey, I've just started getting into electronics, it interests me alot. I have a pretty good understanding of each individual component, but don't have a good one of how they work together, so do any of you know of a good 'circuit cookbook' that has easy circuits with explanations? That would be great. Also, what components should I always have around if I'm just tinkering? I have a bunch of resistors (1 ohm to 1M ohm) and a bunch of capacitors (.22 UF to 2200 UF).

Topic by Jackhole    |  last reply

micro electronics

Basic of this post is where e to buy micro size electronics for micro flying drones which are insect size? I asked arduino and raspberry pi, no answer yet.  in this post :     there is electromotor which OP claim that was used also by inventor of little flying drone...regarding arduino uno board i am not sure that was really used by inventor, please see pictures and videos on if someone knows please post where to buy such micro size electronics. Thank you  

Topic by ruma29    |  last reply

Electronics Help

Hi ppl,I am currently making a variation on this circuit: understand how it all works but do not understand the principle of the inductor capacitor used (bottom left), if anyone could give a brief explanation of this (links are good too) and also some formulae i would b e very greatful!!thanks

Topic by drummer ian    |  last reply

Electronics Noob

Hi, I was thinking of making something that will light up one set of LEDs when you push the button, turn off, and then light up a different set when the button is pushed again, and they alternate each time. Do they make a switch for that sort of thing?

Topic by octochan    |  last reply

Electronic timer

I want to make a timer that sounds an alarm every three minutes, pluss one for setting a seperate alarm for 1 minute.  It is to be used during cpr, (treatment cycles are 3 minutes. 1 minute from shock to circulation check.  Can anybody help me??

Topic by leidulv    |  last reply

Electronic Circuit

I have a spst relay(operating voltage-12v) using for switching the solenoid valve(24VDC and 0.5Amp) which connected through 24 V battery. relay is again connected to the transistor BJT NPN . So please suggest me that which transistor is most suitable.

Topic by jay_3189    |  last reply

Sounds with electronics

So here goes, I am trying to figure out how to make basic sound generating machines. Preferably generating a sound that can be modified with a potentiometer or something of the sort. The principle is simple, these will be for messing around, possibly, if the result is good, using in some random recordings of mine, so most of the machines will have a jack out plug. Anyhow I was wondering, what, in a circuit, actually makes sound, what is the base of all sound generating electronic devices (synth, analog stuff, beepers) what actually creates the wave, the current that is sent to the speakers? Have I just answered my own question by saying current? Is it just the electrical current, and putting random resistors, capacitators, potentiometers and stuff changes the sound that is generated? Any help is more than welcome! and if anything good comes of it, I'll post some sound clips!

Topic by gavox    |  last reply

Natural electronics

Ive been making tons of projects lately and i keep asking myself the same question. What is going on in those little components i solder on. Say i was to take resistors, capacitors, transistors microchips etc... and snap them in two, what would I see? What is it that allows people to program microchips, Is it essentially typing code and sending it into a natural resource? What allow wire to carry information? Does anyone else ask themselves these mind boggling questions? Or better yet does anyone have answer?

Topic by astrozombies138    |  last reply

electronic switch

Hi, i'm a bit new to electronics. I was wondering if its possible to turn on the flow of current by another electrical signal. Yes, i know about transistors and relays but these switches turn off as soon as the second current is stopped, how to make this change in switch permanent, i'll be precise, i'm working on a laser alarm system, and it works fine, but the thing is that when i block the laser, sure the buzzer goes off, but when the obstruction is moved, the buzzer turns off, how can this be kept on until turned off manually by a switch. i know it must be quite simple but i dont know, please help thanks

Topic by walee    |  last reply

Electronic catapult?

Okay. I'm going to make an electromagnet to hold the spring in place while it's compressed, and then as the power turns off, the spring will release and shoot the catapult. However, I'm not an engineer-- I'm making this for tech class. How should I design the catapult so that this will work as a triggering mechanism? In what way should I set up the spring and electromagnet relative to each other? Thanks in advance.

Topic by camiheall    |  last reply

electronics classes

OK so I made some throwies, had a lot of fun with them and now want to learn more. (My 89 yold mother put some on her cane! It is almost a Rosarch test to see what people think of to do with them.) I am very intrigued with all of the things that you can do with led's. HOWEVER, I really don't know anything about electronics. Where should I look, what should I do to learn some basics? I have forgotten everything I (n)ever knew about electricity. I would like to be able to read and understand a simple circuit diagram. I would like to be able to figure out simple circuits and projects on my own. Any suggestions? GLO

Topic by gloflyer    |  last reply


20 amps transformer of 14-0-14 volts from 220 volts bobbin size? primary gauge,turns? secondary gauge,turns thanks.

Topic by imamfarid  

Electroplating for electronics

An idea has occurred to me about how PC boards are currently made. The normal process now is a destructive one, where unwanted copper is etched away. What about figuring a way to electroplate the traces onto a substrate? Various toys and model parts are made of plastic, and yet have been electroplated with a cheap form of chrome. Why not apply that to PC boards? I'm thinking that a photographically negative mask could be used in a photo-sensitive process to apply the conductive surface to a heat resistant substrate, and then the copper traces could be electroplated on. Anyone have any thoughts on this, primarily at a hobbyist level? **note - cross posted in tech.

Topic by charlie_r    |  last reply

Electroplating for electronics

An idea has occurred to me about how PC boards are currently made. The normal process now is a destructive one, where unwanted copper is etched away. What about figuring a way to electroplate the traces onto a substrate? Various toys and model parts are made of plastic, and yet have been electroplated with a cheap form of chrome. Why not apply that to PC  boards? I'm thinking that a photographically negative mask could be used in a photo-sensitive process to apply the conductive surface to a heat resistant substrate, and then the copper traces could be electroplated on. Anyone have any thoughts on this, primarily at a hobbyist level? **note - cross posted in burning questions.

Topic by charlie_r    |  last reply

Electronic Disruptor

OK, so a few years ago my brother got an r/c something or another for his birthday, one day i was screwin' around with it and to my suprise, when i pressed a certain button on the romote, all the lights in the room went out. when i released the button they came back on. I tried it in a few rooms, and it usually had the same effect. i'm guessing there is some sort of combination of capcitors/risistors or something that did this. The r/c toy has long since been lost and i can't recall what it was, and i'm more in to mechanical stuff then electrical stuff, so if some one with some knowledge could help me out, i want to build another one for messing with people at a halloween party.

Topic by amazingpaste    |  last reply

Electronic Toolkit

I do some work with the FIRST Robotics kids and it is amazing to see what they are doing.  Big problem though seems to be a general lack of electrical test equipment.  They don't really have the money to buy oscilloscopes, function generators, CAN and I2C analyzers.   So I got one of the M3 Discovery boards from STmicro and it is really cool.  It has four 5MS A/Ds on it plus a whole host of other features(CAN, I2C, Serial etc.). So it got me thinking. Why couldn't we turn one of these chips into an "All-In-One" electrical toolkit and keep it cheap($50-$60, BOM ~$20).  It would be fairly easy to turnkey. I threw together some simple specs, what do people think. 1) Will supply general use drivers so a user can use the app or write their own. 2) Oscilloscope   a. Two Channel     i. 2MHZ of Analog Bandwidth per channel     ii. 10MS/s per channel     iii. Trigger on rising edge, falling edge, on-command, run-stop actions     iv. Datalogging for extended time periods at up to 10hz per channel (data stored directly to console),  maybe higher rate will  just have to see 3) Serial – 2 Ports   a. Multi selectable protocol w/slew control     i. RS232, RS422, RS485 4) CANBus – 1 port 5) I2C – 1 port 6) SPI  - 1 port 7) 8 Discrete User Selectable 8) Function Generator   a. Two Channel      i. 1MS/s small signal change      ii. 250kS/s full range change      iii. 0-3.3VDC buffered output  9) PWM - 4 Channels

Topic by ase4542    |  last reply

Electronic music class

We are running a eight weeks long electronic music class at Karkhana where kids build their own electronic music instrument and upload the instruction to make it in website. 

Topic by sunojshrestha    |  last reply

favorite electronic kits?

I was wondering if anyone had some favorite electronic kits? There just seem to be a lot out there these days and a lot of places selling them. I'm just curious.

Topic by randofo    |  last reply

electronic tornado simulator

Anyone knows how this works? there is no instructable how to do it with a electronic solution.

Topic by itge13    |  last reply

Need Electronics help

Anyone know a simple circuit that will let me test to see if my transistor is burned out?

Topic by Shadowmang    |  last reply

Sampling electronic components? Answered

I can not find on websites where to sample stuff! can someone give me a link to an online component supplier that has all kinds of electronic components that I can actually sample?

Question by Adum24    |  last reply

Electronic timer circuit.

I have a 9vdc supplying 3ma constant current. I wish to switch polarity automatically every 5 minutes with a timer. How can I do that simply?

Question by rhhince  

need electronic builder

I got a project that i will need  help with i got a small entertanment center and want to have a little light show  from my ps3 i play fps games like mw3 and battlefield  and want to have a leds blink flash when i shoot or when music is playing  if some one could make a very simple  diagram on how to build or contact me

Topic by solid nrg    |  last reply