Potentiometer knob collet work??

I have a 6.35mm smooth shaft Potentiometer and looking for a knob to go onto it. I've seen the set/grub screw type, i get how they work but worried about slipping. Also seen the collet type but not to sure how they clench down on the shaft. The shaft isn't threaded, as just a groove running along the top of it. Would it work like a conventional collet from say a dremmel tool?   

Posted by JonathanM221 1 year ago

Would this LED idea work?

Hello, I was thinking about this concept all day today, in which two potentiometers could vary the voltages to 2 of the 3 legs on a biocolored LED, thus being able to produce many different colors. I figure that I could hook up 3 volts, then (in parallel) hook up the two potentiometers to two of the leeds off the LED, the third being the ground. I'm not exactly an electronics guru, (and I hope that I had my vocabulary right in my explanation), but would this work? Also, where can I get some bicolor LED and potentiometers with knobs?

Posted by Jackhole 10 years ago

No, that doesnt look right... Potentiometer Expert Needed!

Hi All! My brother and I are building an e-bike and we THINK we know how to attach a throttle, but it might blow up the battery... if worse comes to worse then we have a toggle button we can install but it's not really ideal. I've attached a circuit diagram below of how everything goes together, but this is my thinking; With nobody touching the throttle, in my circuit, wont i have a current flowing from the battery anode via the potentiometer straight back into the battery cathode? This results in a huge waste of energy doesnt it? And the battery would drain even when the bike is stored in a hallway overnight.  So, does anybody know if this circuit will work? i need it to take energy from the battery ONLY when active.

Posted by Tsimbilakis 3 years ago


Hello everyone!  I currently have a project in development which is lacking only one step. I am making a DIY Electric skateboard powered by a Arduino UNO board. I have some leds in the back working fine, the esc and motor work when I adjust the delay to 1300 miliseconds.. But my problem is to control the esc and motor via de potenciometer. Right now my potenciometer only reads me the values from 0-1023 but nothing happens. I have a map in my code but nothing is moving when using the potentiometer. Can someone help me out to make the potenciometer work? Here is the link to the instructables page where I have all the materials I used and also the code! https://www.instructables.com/id/DIY-ARDUINO-SKATEBOARD/ Thanks in advance!!

Posted by MauroGB 8 months ago

How to use a potentiometer with this treadmill motor and speed controller?

Hi everyone I found this forum after doing a lot of searching on controlling the speed on a treadmill motor without using the big bulky digital display unit that sits on top of the treadmill. I bought a really nice Nordic Track for 10 dollars on Craigslist and I thought I would be able to figure out how to do this but apparently I was wrong. I have seen a lot of material regarding the MC-60 speed controller unit but nothing about the speed controller that came on the treadmill that I bought which was the MC-2100 Rev B. I will attach a couple of pictures of the board and specifically the wires coming from the display unit that go into the board. I have a 5k pot but I really dont know what to do with it and I am afraid to just start experimenting because I dont want to burn up the motor or the board. I would be happy to post any other pictures or add any other information that might be of help if anyone asks for it. Of course I would like to turn this little project into a lathe if I can ever get everything sorted out. btw the motor is a 2.25 hp cont duty. If the potentiometer wont work, I would love to hear about other ideas to be able to control the speed using this board and motor. Thanks everyone

Posted by wilsocn 6 years ago

Potentiometer help

Hello,I'm new here and pretty new to home audio/electronics projects so please bear with me here.I created my first clock amp a while ago using a Minty Amp kit, an Ikea alarm clock and some other bits and bobs. Here are some images:frontbackgutsI failed to take progress pics so couldn't create an instructable for the project but I plan to do that with my next one (I've had a lot of interest with people actually asking to have them made to order - which Mr Minty Amps, Bob Hickman, assures me is cool). Anyway, so I've ordered the parts to make another clock amp but decided to get some extra bits from Maplin.co.uk this time. In teh first amp I used a 250k guitar potentiometer for the volume but it's not sensitive enough and really only has three settings (full, quiet and silent). So, this time I ordered this 1k pot from Maplin. When the pot arrived it has a 50mm shaft which is too long for my project. I assume I can just trim the shaft down so long as I'm careful since it's only plastic. Is that right?Also, because it's not a guitar pot, the shaft is smooth and so the standard control knobs I have will not fit it. Does anyone know of a (cheap) type of control knob that will fit such a pot? I really don't want to have to glue a knob on there.Thanks for your help.

Posted by clockamps 10 years ago

Automatic Potentiometer

Hi!  i need and automatic potentiometer it has to works max 5v i thouhgt about that and i can make it manually but it's to big and to weird  i want to ask you a form to make  it whit electronic components or a component ho can makes it i want to make a motor acelerates and desacelerates whith a soft curve and if its posible put the time of the cycle (example 40 seconds acelerat.... and .. desaceler...."cycle" or similar) Thanks Sorry for my bad english! Thanks! 

Posted by labalavermella 6 years ago

LED's, Resistors, and Potentiometers

I"m having some trouble with my LED and pot. My LED is a white 2.1v / 30mA My power source is 2 AAA batteries in series at 3v my pot says 500K on the back and three leads labeled 1, 2, 3 When my pot is at the off position, my LED is lit up perfect. but when I slightly turn the dial my LED starts to burn out and turns bright orange, and if I turn the dial further (Or let it sit for a minute) my LED turns bright red. I know that's ruining the LED... But what I'm dying to figure out is how do I know what resistors I would need to use with the pot, What's the math?

Posted by surlistyc 7 years ago

Shop made bench power supply.

Hello I have an atx dual sata 550 watt power supply... I have seen a bunch of instructables on here that allow just a few different voltage selections.. I have also seen a few with potentiometers to allow it to be more adjustable (dial up or down the voltage). That is what i want, i dont want to be limited to just three different options. S my question to you is, what type of potentiometer do i need to buy for this? And will a regular autostore purchased dashboard voltage meter window work? Also, what type of fuse/or breaker should i use?. Do i even need one? I also head i need some kind of "switch" for this as well. I found circut diagrams, i found list of items needed, but most of the instructables ihave found arent very specific on the specs of these extra items needed... Any help or direction would greatly help. Im going out to radio shack today and would love to grab the items needed to finish this priject. Thanks all...

Posted by SlickSqueegie 5 years ago

Can I add a pot?

Hi. I have a metal detector and it can be quite loud when it finds a target. Unfortunately, there is no volume adjustment on it. I don't have a lot of experience wiring pots into circuits so I wanted to ask before I try something and damage my detector: Can I wire a pot inline with the speaker? And if so, would I ground it to the negative side of the battery pack or would I ground it elsewhere? Thanks in advance!

Posted by fosgate3 10 months ago

Potentiometer and motor isn't working properly

Hello, I'm fairly new to electronics and i am currently working on project involving an adjustable motor. basically the circuit is just a nine volt battery going through a potentiometer and into a 6-9 volt motor. however the motor only spins when the potentiometer is turned to max. the potentiometer is a 10k.

Posted by kanp1 1 year ago

(SOLVED) Mounting Slide Potentiometers

I need help for a project I am soon to begin work on ('ible coming soon). It will involve several switches and potentiometers mounted on a piece of hardboard. The switches and rotary potentiometers I have all have washers (or whatever you call the hexagonal things with screw-like threads on the inside) to secure them in place. The slide potentiometers don't. My question is this: How would I mount the slide potentiometers? Thanks in advance, ~H4ZZ

Posted by __DELETED__ 7 years ago

arduino control of digital potentiometer

Is it possible to use my new Ardy board to control a 1-wire potentiometer that will, in turn, control the pwm output for a high-power LED?The POT is here. The lights are REBELS @ 700mA.THe POT will be run in "non-parasitic" layout.

Posted by Tweac-it 9 years ago

which potentiometer to use for time lapse motor

I was looking at a camera slider and this motor for a time lapse slider: http://www.amazon.com/gp/product/B00436ULLA/ref=ox_sc_act_title_6?ie=UTF8∣=AUUK2J4ODEV5F I read somewhere online that someone used a rotisserie motor and hooked it up to a camera slider for a time lapse of about 40 minutes, but if I wanted to make the motor move even slower for a longer time lapse, can I hook up a potentiometer somewhere in the rotisserie motor? If so, what type of potentiometer should I get? Would this work: http://www.amazon.com/Parts-Express-10K-Ohm-Potentiometer/dp/B0002KRE20/ref=sr_1_1?s=industrial&ie;=UTF8&qid;=1355018144&sr;=1-1&keywords;=potentiometer

Posted by dylanp1936 5 years ago

10-15 AMPs w/ potentiometer.

So, as a chemist I thought it would be fun to save some $ by making my own hot plate & magnetic stirrer. I am using Thermoelectric cooling device (TEC) to heat my stirrer, and a small DC motor to stir. Here's the problem - if you've ever taken highschool chemistry you will know that a hot plate with a stirrer has a potentiometer for Temp & Stirring speed - I'd like to do the same! Problem: the TEC takes anywhere from 5-20 amps in operation @ 12 volts DC. Adding a potetiometer to this in parallel is out of the question - I can't fine a potentiometer that can handle greater than 2 watts. ( i may just be looking in the wrong place)... So.. all in all I'm looking for nearly 140-170 watts of power for my heating plate. (The motor will be using much less, almost negligble to the heating plate) So, if I can't put a potentiometer in series for power regulation, how can I get my temperature to vary? If this is going to require a circuit board, I may need some help with a design :)

Posted by GreenD 8 years ago

LED Slider Indicator

I don't know very much when it comes to electronics. All I know is how to make a simple circuit. Conect bulb to battery, battery to swich, swich to bulb. I need some help making a circuit bord with an on off swich, 5 LED's & a sliding potentiometer. What I like this curuit to do is, turn on swich, the first led lights up. I push the slide potentiometer up or down & the four other LED's light up or down with the slider.

Posted by elkaddalek 3 years ago

How do I make a dimmer for my christmas lights?

I have some x-mas lights(the incandescent kind, not LEDs) hanging on the ceiling in my bedroom but they are a little too bright sometimes, so I thought it would be fun to attach some sort of dimmer switch to them. Do I need anything special or can I just hook up any old potentiometer I can find in my junk bin?

Posted by cannedham160 9 years ago

best price for trimming potentiometer

Elecsound can offer almost full range of lead type cermet Trimmer Potentiometers 3296 9mm Square Multi-Turn Trimmer Potentiometers 3006 Rectangular Multi-Turn Trimmer Potentiometers 3266 6mm Square Multi-Turn Trimmer Potentiometers 3269 6mm Square Multi-Turn Trimmer Potentiometers 3323 6mm Square Single-Turn Trimmer Potentiometers 3362 6mm Square Single-Turn Trimmer Potentiometers 3386 9mm Square Single-Turn Trimmer Potentiometers 3329 Round Single-Turn Trimmer Potentiometers For above items,we can have the competive price in the market,and fast delivery,if you need any of them,pls contact with us freely by email.mollie@elecsound.cn

Posted by elecsound33 11 years ago

Potentiometer for 20v??

Hello! I am trying to build a bench power supply from a laptop power supply and i need a potentiometer capable to handle 0-20v. I have tried many times with different potentiometers but they all start smoking and later starts burning :( i don't know that much about elektroniks circuits so be gentle :) Please help me!

Posted by WaNa_Cookie 4 years ago

Hollow shafted potentiometer?

Hi everyone,  I have a project I'm working on which has two halves that are connected using a potentiometer as the axis, resulting in the two being able to twist, changing the resistance of the potentiometer.  The problem I have is that the battery is in one half and the circuit is in the other half.  I have to somehow get the power to the circuit, but still have the pieces still be able to rotate.  I can't have the wires just sticking out of the side because it has to twist, and that would look horrible.  My first thought was to drill a small hole through the shaft of the potentiometer, so that I could run the wires through that, but when I tried to do that, it turned out to be a lot harder than I expected and I now have a busted potentiometer.  I would really like to avoid slip rings of any kind, as they would be exposed to the elements.  Does anyone have any ideas, or any advice on how to drill a nice hole through a steel rod lengthwise?  Ideally I would drill the hole, but if that's too difficult, I'll try whatever. Thanks ~Dudes

Posted by dudes 2 years ago

Dimming Leds and Potentiometers

Looking for a formula; I have a 24v 1.7 amp power supply ( http://www.allelectronics.com/make-a-store/item/PS-2417/24VDC-1.7A-POWER-SUPPLY/1.html ) to light 2 - 24v led strips ( http://www.allelectronics.com/make-a-store/item/LBR-24/24-WHITE-LED-LIGHT-STRIP-24VDC/1.html ). I want to be able to dim the led's from full power to completely off, but don't know how to calculate what size of potentiometer would give me the right ratio for dimming. IE, I don't want the LEDs to be completely off when the pot is only halfway turned. The urls are links to the exact products I purchased. Also, the power supply seems kind of large, and I still have to enclose it, so if anybody knows of a better and cheap path to get 24v that involves a little less potential for death, I'm all ears. Thanks!

Posted by bctour7 8 years ago

Wireing joystick from PS1 controller to USB for PC

I would like to wire a joystick, taken from a PS1 controller, to USB and be able to use it for my PC. The joystick has two Potentiometers ( three wires each, of course ) and a single push switch ( two wires ) I am unsure how this may be done, ( I'm sure it can be ) and also wouldn't know much about writing software for it, should it be accomplished. any help will be greatly appreciated.

Posted by jacob5680 9 years ago

How do you hook up a linear actuator to be controlled with PWM / R/C?

Hi Everybody, I'm working on a robotics project requiring strong linear actuators(LAs). For the most part I see that using LAs is the same as using DC motors. The red and black cables of the LA would connect to the motor +/- terminals of a motor controller. The main power source would connect to the battery +/- terminals of the motor controllers, and the motor controllers input could then come from a microcontroller or single board computer (SBC) using PWM / R/C control. This should allow me to control the direction and the speed of extension. However, for my application I and going to need multiple LAs the need to extend exactly in sync. The best way I can think to do that is to sense their individual extensions and program the LAs so that they stay in sync with each other. From what I've seen what I'm looking for are LAs with built-in limit switches and potentiometers.  What I don't know is how to hook these up to their motor controllers and microcontroller/SBC. An example I'm looking at is this one from Firgelli Automations: http://www.firgelliauto.com/product_info.php?cPath=94&products;_id=159. Unlike hobby servos this LA has 5 wires. Two are the positive and negative power wires and the other three relate to the potentiometer. I know you can control the extension this way but so far I've only found youtube videos and couldn't see how they hooked everything up. This datasheet for different LA (http://www.firgelli.com/Uploads/L12_datasheet.pdf) helped me understand what the potentiometer wires do, but not how to use them with a PWM microcontroller. Does anybody have experience with this? Thanks for reading

Posted by honor_the_ways 6 years ago

Help with dc motor and potentiometer! Thanks

OK so my dad has this old turntable and I got him some cool records for Christmas and I tested them out and it sounded good but now the motor isn't working, its kinda temperamental. I know the motor works because i tested it separately with a 9V, i guess the wiring is just kinda old and faulty. Any way my idea is to put the motor on its own independent circuit and adjust its speed with a potentiometer. Its one of those small DC motors 12V. I was thinking about hooking it up to a battery pack and a pot to adjust the rpm, I could mount the knob on the face of the player and adjust it until the music sounds just right. Then i could make a mark for 33 rpm and 45 rpm so he can change records with just a twist of the knob. Or slow them down and speed them up just for fun lol. How can I wire all this? I did some googling and tried with a couple pots and motors I've harvested over the years but all the pots seem to smoke and sizzle with only a 9V battery. Do I need a different pot? Please help! thanks  

Posted by sticitodaman 6 years ago

Potentiometer not working after connected to wires

Hi, I'm fairly new to electronics and I'm trying to learn it with my Arduino. Recently I have been working on a project that involves 4 potentiometer(pot). I'm using one 1k pot and 3 10k pot. The pot is used to send signals to the analog inputs of the arduino. To test the pots I used a simple serial.println program that sends the value of the pot from 0 - 1023. When I connect the pot through its 3 pins directly to the breadboard, all of them work perfectly fine and gives me a stable value as I turn the pot. However, when I soldered three wires to them each, 2 of them work and 2 of them didnt. The 1k and one of the 10k pot didnt work. When I connected it through its wires, the values it gave kept jumping even when I'm not turning the knob and sometimes it will just stay one value when I'm turning it or not. Why is this happening? Did I overheat the pot when soldering? I took some new pots and tested them again through the pins directly and it worked perfectly fine. But when I soldered the wires to it, this time the 10k worked fine and the 1k didnt work. It gave the same problem as the ones before. Please help me with this problem. I have attached the pictures of the pots that didn't work. Please help me check if my soldering is anything wrong. I have checked online couldn't fine anyone experiencing the same problem. TQ! 

Posted by KhayhenS 3 years ago

How to make a simple voice changer

Hello guys I have a question. I'm just trying to make a simple, cheap, voice changer like the little stupid toys you buy from the store.  How can I do it? I've looked ALL over the internet, and can't find ANYTHING thats simple like the little toys you get. Plus the ones I do find are too expensive.  Thanks,

Posted by HavocRC 5 years ago

Servo Mod help

Hi Every one thanks for looking at my post. I have a specific project where I need 8 servos which would need to rotate up to 360 degrees. Please note I do not need continuous rotation mod, which would make me loose servo angle control. Given that i ended up with 3 options 1. Buy a winch or sail servo - these are costly about $40 and not sure if they suite my need. 2. Add an additional gear with 1:2 or 2:1 ratio (not sure about the terminology) of the main servo gear ( attached to pot); Servo rotates about 230 degrees now, so limiting it to 180 degrees from code and with the additional gear and modification I can get a 360 rotation on the added gear and use that as my main servo drive. 3. Replace current potentiometer with a multi-turn one ( available for around $2) with similar resistance value, this along with the potentiometer gear stop peg removal would give more than 360 degree rotation. Servo control would not be effected as resistance value is same and angle must be limited from code to keep the potentiometer from going to the end limits. I am just preparing and calculating the current gear values to decide on the specs needs for the gear mod. I need to measure servo pot values to find a suitable multi-turn pot. I would really appreciate if any one could comment on my approach and any alternatives. I wish some one had tried these before and could share their experience. Thanks Satya

Posted by sguthula 4 years ago

Treadmill Motor Controller

HI, I would like to make a very simple controller my treadmill's Motor. Its MoBo went bad and I dont wanna fork over $200 for a new one. The motor works fine. I just want to make a very basic DC Motor speed controller. I know just a simple Pot or other variable resistor wont do.Will it? I've been messing around with Electronics since I was 9 so I'm not afraid to solder up some circuits even if its a complicated one. Im looking to spend around $50. Thanks.

Posted by AlxMad 10 years ago

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(); }

Posted by PaavoM 1 year ago


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

Posted by vcente.capio.1 3 years ago

Why wont my servos react to my potentiometers

Hello everyone, hope your day is better than mine. I am trying to figure this out and to the best of my knowledge; I just can’t get this to work. Everything is connected correctly.  Note, I am also using separate power to the breadboard. The problem is, the servos adjust themselves when I apply power, but they will not turn when I increase or decrease the rotation of the potentiometers (I know all servos work and the pots work as well (trust me, I tested each using a single servo and pot sketch) I am almost positive it is an oversight, and I have been staring at it so long that, well I am most likely am overlooking the problem. I would really appreciate your assistance. So here is the code: #include Servo pot1V;  // create servo object to control a servo Servo pot2V;  // create servo object to control a servo Servo pot3H;  // create servo object to control a servo Servo pot4H;  // create servo object to control a servo int mypan1 = 0;  // analog pin used to connect the potentiometer int val0;    // variable to read the value from the analog pin int mypan2 = 1;  // analog pin used to connect the potentiometer int val1;    // variable to read the value from the analog pin int mytilt3 = 2;  // analog pin used to connect the potentiometer int val2;    // variable to read the value from the analog pin int mytilt4 = 3;  // analog pin used to connect the potentiometer int val3;    // variable to read the value from the analog pin void setup() {   pot1V.attach(3);  // attaches the servo on pin 9 to the servo object   pot2V.attach(5);  // attaches the servo on pin 9 to the servo object   pot3H.attach(6);  // attaches the servo on pin 9 to the servo object   pot4H.attach(9);  // attaches the servo on pin 9 to the servo object    } void loop() {   mypan1 = analogRead(0);            // reads the value of the potentiometer (value between 0 and 1023)   mypan1 = map(mypan1, 0, 1023, 0, 179);     // scale it to use it with the servo (value between 0 and 180)   pot1V.write(val0);                  // sets the servo position according to the scaled value   delay(15);                           // waits for the servo to get there   mypan2 = analogRead(1);            // reads the value of the potentiometer (value between 0 and 1023)   mypan2 = map(mypan2, 0, 1023, 0, 179);     // scale it to use it with the servo (value between 0 and 180)   pot2V.write(val1);                  // sets the servo position according to the scaled value   delay(15);                           // waits for the servo to get there   mytilt3 = analogRead(2);            // reads the value of the potentiometer (value between 0 and 1023)   mytilt3 = map(mytilt3, 0, 1023, 0, 179);     // scale it to use it with the servo (value between 0 and 180)   pot3H.write(val2);                  // sets the servo position according to the scaled value   delay(15);                           // waits for the servo to get there   mytilt4 = analogRead(3);            // reads the value of the potentiometer (value between 0 and 1023)   mytilt4 = map(mytilt4, 0, 1023, 0, 179);     // scale it to use it with the servo (value between 0 and 180)   pot4H.write(val3);                  // sets the servo position according to the scaled value   delay(15);                           // waits for the servo to get there } Thank you so much in advance, Anna :)

Posted by Abrandonmi 5 years ago

How can i get this working?

This is a picture of a little project i have been working on. I am trying to develop a device that can individually control the volume into each speaker of a headphone (Left and Right). The problem i am having is that only the top potentiometer is actually changing the volume and that is the left headphone speaker. No sound is played from the right speaker at all even when the potentiometer is on "full blast". If you have any ideas to get this working it would be wonderful!. Thanks! -Will

Posted by willyt1200 4 years ago

toy rc car steering mod

I just got a sorta good used R/C toy car for $2, pretty nice for $2, and it works too full suspension, differential drive, two speed gearbox, and the steering mechanism uses a servo but this servo has all of it's control electronics out side the gearbox and on the single PCB the car uses. I just want to hack it so that I can turn it into a 2.4ghz (freebie RF modules from cypress yay) controlled "hobby grade" car with variable speed and such this gearbox has 7 wires sticking out of it, 2 are to power the motor itself, another 2 is 6v+ and ground ( - ), the last three is a potentiometer in the mega ohms range, higher than 20 mega ohms for sure, because it goes out of my multimeter's range if it's at neutral, but goes to about 10 mega ohms when the wheels are turned now, my datasheet for my PICmicro says in the A/D converter section "The maximum recommended impedance for analog sources is 2.5 kΩ" I can't really replace the potentiometer inside the gearbox, there is room for me to fit in my own, what would you do? *add parallel resistors to the potentiometer (probably easiest) *I can have a piece of paper shaded from light to dark and have a photo resistor tell me the darkness of the paper (might get jerky) *I can probably directly attach a potentiometer outside the gearbox directly in line with the output shaft (durability issues) *or I can put a gear on the shaft and have a potentiometer above the gearbox (I would need to cut my chassis to fit it) what sounds good?

Posted by frank26080115 11 years ago

What Is This???

I took apart a TV a couple months ago and I just noticed this in the CRT circuit. I think that this is some sort of big potentiometer but I'm not sure. Can anyone please tell me?

Posted by gobitz 9 years ago


Potentiometer ARCING inside :( Anybody know what's going on  ? I'm using a 100k to control a 50k ohm load . i smell lots of smoke . It's a LM386 with pots at the output section to a 8W power amp .

Posted by Thereyouhaveit 7 years ago

Begginer electronic projects

Here, I will upload project schematics for different simple breadboard projects. For these projects you will need a breadboard, jumper cables and different electronic components, such as LEDs, potentiometers, and more. Thank You!

Posted by Detectingdragon777 1 year ago

555 oscillator?

How can I make a simple variable oscillator out of a 555 timer, loudspeaker, capacitors, transistor, potentiometer, and resistors? (and anything else I may need). I would ideally like it to go from about 10Hz-20KHz.

Posted by andy70707 7 years ago

Need a list of places to get electrical components,other than online!!!

I need a list of stores that i could physically go into to get electrical components(transistor,capacitors,potentiometers etc.) AND I ALREADY KNOW ABOUT RADIOSHACK!!!

Posted by wesie42 10 years ago

A lamp from RGB LEDs

Hi, I'm want to build a lamp from 63 RGB LEDs. I want to be able to change the intensity of each color. Is there something in my schematics that should  be changed, for example do I even need the resistors after LEDs since I have the potentiometers. I think the values might need to be changed. The switches before resistors are to eliminate that color if the potentiometers won't do it. There should be also a main switch after the power supply.. Do I need anything else, so that it will work and to it will be safe? A bit offtopic, but if I would only use one color LEDs, would it be better to connect them to parallel or series?

Posted by goljat 4 years ago

RGB Potentiometer help!

Hey guys and girls, I've got a question! I've got 3 voltage regulators set up in parallel, wired to output 3.27V @ an amperage that I don't know (for some reason I can't get a reading on my e-meter) Anyway, The outputs from those 3 regulators are going to 3 pots, which in turn go to a set of 3 LEDs, 9 in total (3R 3G and 3B). My problem is that those pots have a max resistance of 2k ohms, and that the LEDs aren't shutting off when the resistance is maxed out. Can you guys find a way to make the LEDs shut off, yet still go on at full blast when the Pots are open? Thanks, -Josh

Posted by T3h_Muffinator 11 years ago

CHALLENGE: Dirty Video Mixer with Sound Sensor!

Hey guys I have a challenge for you all but forewarning I am a bit of a novice with Arduino and electronics in general. I want to adapt Karl Klomp's Dirty & Cheap video mixer (schematic attached) into something a bit more responsive. The original video mixer is essentially just two RCA inputs fed into a potentiometer and then a combined output is produced as a mix of the two original video sources. I want to swap the potentiometer for a sound sensor (image attached) to allow for the mix of the video output to be governed by the volume of the mixer's surroundings. If anyone could please help me that would be great!!! (Even my lecturers are stumped) Thanks in advance guys! Ryan

Posted by rachten 4 years ago

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!

Posted by gavox 6 years ago

LED dimming and color temperature control (variable white LEDs)

I'm trying to find an inexpensive way to control a variable-white LED strip with knobs. There are tons of remote dimmers and wall-touch-controls available. These are way too complicated or too big for my application. All I want is two knobs. One that controls the brightness of the LED strips and one that controls the color temperature between the cold and the warm white LEDs I did some research and see two possible solutions: a) 100% analog using potentiometers and LED drivers or b) using potentiometers, Arduino, and LED drivers. Here are the details: a) Analog: - Use two LED drivers to drive the actual LEDs, like these ones: http://www.ledsupply.com/led-drivers/buckpuck-dc-led-drivers - Use two dual-channel potentiometers to control the brightness of the two different LEDs in the strips:   - One controls the brightness for both channels (connected to the same pins)   - One controls the relative brightness between the channels (connected to opposite side pins) b) Using Arduino: - Any Arduino with analog inputs - Two single-channel potentiometers connected to two analog inputs - Some software that generates the correct PWM outputs for the two LED channels - LED drivers that can dim using PWM signal input. According to this post, the same BuckPucks can do that, too: http://forum.arduino.cc/index.php?topic=14603.msg107089#msg107089 Do you have any advice on these options? Is there a third one or even an off the shelf solution? What about compliance and certification? If I use BuckPucks and other components that are certified, do I still need a certification for the whole system? (assuming I want to use the design not just for my personal pleasure)

Posted by smensch07 3 years ago

Heat gun mod question

I am not an electrician but I like to tinker. I am just getting started with DIY type electronics kits and I have decent soldering skills. I cant say I am an expert at reading prints, but I can usually build a simple schmatic. I wish to disassemble a heat gun for parts and add in a potentiometer to vary the heat, another potentiometer to control the airflow, and a digital temperature probe with temp display. I am attempting to build a heat generating device with precise control of the temperature and airflow. I dont really want to spend $150 on a fancy LED digital display heat gun with variable heat dial, so this is my next option and potentially a heck of a lot more fun. Initially I just want to get the variable heat and airflow control(potentiometers) hooked up, and if it will be easy enough I can later install the temp display. I could always just use a cheap "laser" temp probe to check the temp and ensure it is fairly stable. The heat gun I am looking at is a piece of junk and it only has 2 temp settings. How easy is it to install a potentiometer for varying the heat and one for the airflow? I assume I can just install the one for heat control inline after the circuit that sets the maximum heat level and dial in the temp I want. As for the airflow control I assume I could do the same thing, but instead put it before the power lead feeding the fan. I am not an electrical engineer so I want to make sure this will work first before I fry my cheapo $20 heat gun. Would it be bettter to just gut the entire thing and work with the naked parts and install my own circuit to control and display the temp or could I keep the basic unit intact and mod from there? Any ideas, or a basic schematic that would satisfy this requirement would be greatly appreciated.

Posted by RokGoblin 9 years ago

time /magic fountain

Could anyone help me with that time /magic fountain https://www.instructables.com/id/The-Time-Fountain-Also-know-as-Magic-Fountain/ What do i have to do with this information "The transistor (2N1711) can handle a maximum current of 500 mA"? could you also tell me wich potentiometer i should use and how i have to control the leds with them?

Posted by itge13 6 years ago

led ambilight rgb

I am interested in building Dan's RGB led system except where he used sliding potentiometers i want to use 3 light sensors with red green and blue filters. similar to Phillips Ambilight but in addition to behind the tv all over the room.any suggestions?i have limited knowledge of electronics and i do not know how to wire light sensors.a combination of the photos provided.

Posted by Robb 10 years ago


Alright i'm converting this old vex system into a rc car and the motor has and idle speed that can be controlled with this small potentiometer and when i turn it so the idle is off when i use it (i use it for steering) and when i use it the idle turns back on and iono what to do any ideas i tried using a resistor but it leaves too little voltage for the motor to turn the steering arm well

Posted by lightpacker 10 years ago

Wiring DPDT 20 Amp Switch

I am in the process of building a MAP Sensor for my vechicle using a 20 Amp DPDT switch with an 100k Potentiometer. I want to use one side for going back to the origianl and the other side for the modification. I also want to have a green light showing when it is in the original condition and a re (warning) light for when it is in the modification mode. Can I do this? If so How about showing me how to do so. I have attached a picture of what I am trying to do. The toggle switch has 6 blades and I don't understand the schesmatic in hooking it up. I am attempting to make two into one. the upper switch is to control the Potentiometer on the left with the green and red lights above it. The bottom switch is to control the one on the right. When both switches are in the original circuit, both gree light should light up. When they are in modifying mode both red lights should light up. Hope you understqnd wht I am trying to say here.

Posted by DocBunner 9 years ago

High current variable voltage from an atx psu

What would be the most simplistic way to draw up to 10a on an atx PSU using variable voltage controlled by a potentiometer? I've looked at a few diagrams using the LM317 but it is limited to 1.5a. The only other VVR I can find is the LM350 but is still limited to 3a. Any ideas? I was thinking of stacking an arrey of LM350s in parallel but this doesn't seem like a viable answer.

Posted by andrewlapham2010 1 year ago

arduino code

Guys I want to build a quadcopter. I have an arduino uno, adafruit motor shield, 4dc motors and an rf link transmitter/receiver. Problem is I don't know programming at all. Pls help me and give me a code for controlling the motors with the sheild wirelessly withb rflink. Planning to control with 4 potentiometers. P.S I have only one arduino.

Posted by fahmed20 4 years ago