Help with PWM dimmer?

Ello mates,so i biult a pwm dimmer acording to  https://www.instructables.com/id/PWM-dimmer-using-NE555-and-MOSFET-with-DIY-alumini/ but its kinda different,i used irf530n and ne555p ic, And when i connected all of the components with a 12v source it happens nothing except that little spark comes on gnd with adapter? Help please ? 

Asked by JohnSmith-Workshop 2 years ago  |  last reply 2 years ago


LED Dimmer help

Hello,     I have a project that uses a 24" LED strip, powered by an A23 12v battery.  I need to make the LED manualy dimmable .  Is there an inexpensive assembly that would work for this? Or  If i need to make my own, could you give some direction to someone new to electronics?  Thanks,

Posted by surgeslayer 8 years ago


Air Switch Dimmer

I would like to make a switch like the one in mathmos Air Switch. i am not sure how to but could this be done. or is there some thing close that i can do? need it for a school project. thanks pyr0000

Posted by pyr0000 11 years ago  |  last reply 11 years ago


Arduino dimmer code

I am creating a 6 channel light dimmer system using an arduino duemilanove. I want to control it using push buttons to  dim and brighten. I want to setup 6 buttons to corresponding to the 6 channels. Then I want an up, down, and on/off button. When you hold down a channel button, it activates to up and down button to control that channel. I want the on/off button to turn all channels to full brightness or completely off. I am basing the dimming part of the circuit off of this instructable: https://www.instructables.com/id/Arduino-Powered-Musical-Christmas-Lights/. Anyway, I have ordered an arduino but want someone to check out my code before I build this. I have made many things but am new to writing my own code so I would appreciate any improvements and friendly advice. Here is the code: int light1pin=3; int light2pin=5; int light3pin=6; int light4pin=9; int light5pin=10; int light6pin=11; int button1pin=0; int button2pin=1; int button3pin=2; int button4pin=4; int button5pin=7; int button6pin=8; int uppin=12; int downpin=13; int onoffpin=14; int onoff=0; int light1=255; int light2=255; int light3=255; int light4=255; int light5=255; int light6=255; int interval=1; void setup() {   pinMode(light1pin, OUTPUT);   pinMode(light2pin, OUTPUT);   pinMode(light3pin, OUTPUT);   pinMode(light4pin, OUTPUT);   pinMode(light5pin, OUTPUT);   pinMode(light6pin, OUTPUT);   pinMode(button1pin, INPUT);   pinMode(button2pin, INPUT);   pinMode(button3pin, INPUT);   pinMode(button4pin, INPUT);   pinMode(button5pin, INPUT);   pinMode(button6pin, INPUT);   pinMode(uppin, INPUT);   pinMode(downpin, INPUT);   pinMode(onoffpin, INPUT); } void loop() {   analogWrite(light1pin, light1);   analogWrite(light2pin, light2);   analogWrite(light3pin, light3);   analogWrite(light4pin, light4);   analogWrite(light5pin, light5);   analogWrite(light6pin, light6);   if (digitalRead(onoffpin) == HIGH && onoff == 0){     light1=255;     light2=255;     light3=255;     light4=255;     light5=255;     light6=255;     onoff=1;   }   if (digitalRead(onoffpin) ==  HIGH && onoff == 1) {     light1=0;     light2=0;     light3=0;     light4=0;     light5=0;     light6=0;     onoff=0;   }   if (digitalRead(button1pin) == HIGH) {     if (digitalRead(uppin) == HIGH && light1 < 255){       light1 = light1 + interval;     }     if (digitalRead(downpin) == HIGH && light1 > 0){       light1 = light1 - interval;     }   }   if (digitalRead(button2pin) == HIGH) {     if (digitalRead(uppin) == HIGH && light2 < 255){       light2 = light2 + interval;     }     if (digitalRead(downpin) == HIGH && light2 > 0){       light2 = light2 - interval;     }   }   if (digitalRead(button3pin) == HIGH) {     if (digitalRead(uppin) == HIGH && light3 < 255){       light3 = light3 + interval;     }     if (digitalRead(downpin) == HIGH && light3 > 0){       light3 = light3 - interval;     }   }   if (digitalRead(button4pin) == HIGH) {     if (digitalRead(uppin) == HIGH && light4 < 255){       light4 = light4 + interval;     }     if (digitalRead(downpin) == HIGH && light4 > 0){       light4 = light4 - interval;     }   }   if (digitalRead(button5pin) == HIGH) {     if (digitalRead(uppin) == HIGH && light5 < 255){       light5 = light5 + interval;     }     if (digitalRead(downpin) == HIGH && light5 > 0){       light5 = light5 - interval;     }   }   if (digitalRead(button6pin) == HIGH) {     if (digitalRead(uppin) == HIGH && light6 < 255){       light6 = light6 + interval;     }     if (digitalRead(downpin) == HIGH && light6 > 0){       light6 = light6 - interval;     }   } }

Posted by bmrodgers3365 6 years ago  |  last reply 6 years ago


led bulb dimmer

How to make a dimmer for led bulbs which are non-dimmable type?

Posted by allwynkumar 1 year ago  |  last reply 1 year ago


Car light dimmer

Hi all, Can someone show me how to make a car dimmer or point me in the right direction to make one. Just to recap this is like the new cars when you open the car the light fades up and when the car door is closed the light will take 5 to 10 seconds to dim out. Thanks in advance.

Posted by Dave-v-v 8 years ago  |  last reply 8 years ago


LED dimmer PCB needed!? Answered

I was looking to make a LED dimmer cct and wanted to know if anyone had a pcb layout for one? The problem I am having is the 555 IC can only power 4 LEDs and i need to power 11 rows of 5. I was woking off this cct Can anyone help, thanks. 

Asked by crazyaxemax 6 years ago  |  last reply 6 years ago


LED Dimmer circuit needed

LED dimmer circuit please suggest me a good one,my LED is CREE XML LED voltage ratings is 3-3.5V and current ratings is 0.7-3A.Input should be 5Volts. It should have a variable resistor with switching function.ON/Off potentiometer. Your early response is welcomed!.?

Asked by Faizan Hamayun 7 years ago  |  last reply 7 years ago


Using a Dimmer for Power Tools?

I want to make something for my 120V AC Black&Decker; Jigsaw, But it will cover the trigger. My question is: Is okay to use a 120V/110V AC Dimmer (PWM?) to control the speed instead? I can keep the jigsaw's trigger at "full power" with a zip-tie, But the control the speed control will come through the dimmer... Are there any problems with the fact that the jigsaw is an "inductive load"? If it is, Can I improve it with a capacitor? My jigsaw uses 4.5Amps @120V, How many Watts is it? (IDK the formula for AC Watts...) Is there any more information that I missed? Thanks,     Yonatan

Asked by Yonatan24 3 years ago  |  last reply 3 years ago


Dimmer Question about Amperage? Answered

I've searching for a dimmer that its flicker won't be visible. This dimmer is the one that I came up with It claims to be 3-35V, and 90W MAX, but also 5A MAX.  Does this mean that the maximum power that it can supply is either 5A or 90W? That means that for 3V it would be able to supply 15W (5A), and for 35V it would be able to supply 2.5A (90W). Am I correct? Is it the first one that reaches MAX the maximum? I'm going to use it for 12V. That means that I can use 5A max, right? Thank You!

Asked by Yonatan24 2 years ago  |  last reply 2 years ago


Arduino light dimmer code? Answered

I am creating a 6 channel light dimmer system using an arduino duemilanove. I want to control it using push buttons to  dim and brighten. I want to setup 6 buttons to corresponding to the 6 channels. Then I want an up, down, and on/off button. When you hold down a channel button, it activates to up and down button to control that channel. I want the on/off button to turn all channels to full brightness or completely off. I am basing the dimming part of the circuit off of this instructable: https://www.instructables.com/id/Arduino-Powered-Musical-Christmas-Lights/. Anyway, I have ordered an arduino but want someone to check out my code before I build this. I have made many things but am new to writing my own code so I would appreciate any improvements and friendly advice.  Here is the code: int light1pin=3; int light2pin=5; int light3pin=6; int light4pin=9; int light5pin=10; int light6pin=11; int button1pin=0; int button2pin=1; int button3pin=2; int button4pin=4; int button5pin=7; int button6pin=8; int uppin=12; int downpin=13; int onoffpin=14; int onoff=0; int light1=255; int light2=255; int light3=255; int light4=255; int light5=255; int light6=255; int interval=1; void setup() {   pinMode(light1pin, OUTPUT);   pinMode(light2pin, OUTPUT);   pinMode(light3pin, OUTPUT);   pinMode(light4pin, OUTPUT);   pinMode(light5pin, OUTPUT);   pinMode(light6pin, OUTPUT);   pinMode(button1pin, INPUT);   pinMode(button2pin, INPUT);   pinMode(button3pin, INPUT);   pinMode(button4pin, INPUT);   pinMode(button5pin, INPUT);   pinMode(button6pin, INPUT);   pinMode(uppin, INPUT);   pinMode(downpin, INPUT);   pinMode(onoffpin, INPUT); } void loop() {   analogWrite(light1pin, light1);   analogWrite(light2pin, light2);   analogWrite(light3pin, light3);   analogWrite(light4pin, light4);   analogWrite(light5pin, light5);   analogWrite(light6pin, light6);   if (digitalRead(onoffpin) == HIGH && onoff == 0){     light1=255;     light2=255;     light3=255;     light4=255;     light5=255;     light6=255;     onoff=1;   }   if (digitalRead(onoffpin) ==  HIGH && onoff == 1) {     light1=0;     light2=0;     light3=0;     light4=0;     light5=0;     light6=0;     onoff=0;   }   if (digitalRead(button1pin) == HIGH) {     if (digitalRead(uppin) == HIGH && light1 < 255){       light1 = light1 + interval;     }     if (digitalRead(downpin) == HIGH && light1 > 0){       light1 = light1 - interval;     }   }   if (digitalRead(button2pin) == HIGH) {     if (digitalRead(uppin) == HIGH && light2 < 255){       light2 = light2 + interval;     }     if (digitalRead(downpin) == HIGH && light2 > 0){       light2 = light2 - interval;     }   }   if (digitalRead(button3pin) == HIGH) {     if (digitalRead(uppin) == HIGH && light3 < 255){       light3 = light3 + interval;     }     if (digitalRead(downpin) == HIGH && light3 > 0){       light3 = light3 - interval;     }   }   if (digitalRead(button4pin) == HIGH) {     if (digitalRead(uppin) == HIGH && light4 < 255){       light4 = light4 + interval;     }     if (digitalRead(downpin) == HIGH && light4 > 0){       light4 = light4 - interval;     }   }   if (digitalRead(button5pin) == HIGH) {     if (digitalRead(uppin) == HIGH && light5 < 255){       light5 = light5 + interval;     }     if (digitalRead(downpin) == HIGH && light5 > 0){       light5 = light5 - interval;     }   }   if (digitalRead(button6pin) == HIGH) {     if (digitalRead(uppin) == HIGH && light6 < 255){       light6 = light6 + interval;     }     if (digitalRead(downpin) == HIGH && light6 > 0){       light6 = light6 - interval;     }   } }

Asked by bmrodgers3365 6 years ago  |  last reply 6 years ago


Can you hook a blender to a dimmer switch?

HI,  i need to be able to vary the speed of a blender, it has to go MUCH slower then a standard setting. And it needs to be infinitly adjustable.  HOw can this be accomplished. Keep in mind i know NOTHING about electrical systems or motors.  Thanks!

Asked by estuvam 9 years ago  |  last reply 9 years ago


I need a dc dimmer circuit with an external switch 12v 10 amps

I need some one to design a circuit board for a very small 3"x 2" footprint dc dimmer module It needs 2 wires to a battery 2 wires to power LED strips 2 wires leading to an external rocker switch that will be used to control the module Any questions please feel free to email me at  Rob@xtremeled.com I need the design only. I can build it 

Posted by xtremeled 6 years ago


help with dimming leds

I recently bought an rgb 12v led tape thats about 1 meter long and i want to attach it the bottom of my scooter. What would be the best way to put a dimmer on the leds? Do i need a PWM sort of a thing or can i just use a 100ohms pot?

Posted by shieldliger101 10 years ago  |  last reply 10 years ago


I want to control LED bright/dim with push buttons. Can help?

Want to dim/ bright LED with two push buttons. PIC 12F675 and 16F628A will helpful to me. Thanks

Asked by ashwal 9 years ago  |  last reply 9 years ago


Is there such a thing as Motion-detecting Dimmer Switches?

HEllo. I am wondering about either dc or ac auto dimmer switches. What I would like to do is make a series of auto on and auto off dimming blacklights for a gallery. I haven't found much of anything online. I wondered if there is a diy workaround possible?

Asked by sreudianflip 7 years ago  |  last reply 7 years ago


raspberry pi digital dimmer of light bulb

Hai, iam working on dimmer light project with raspberry pi the module which iam using from research design lab issues with the device to test or run it. please any one can suggest me can i change the module to wifi based dimmer module to test or run the light dimmer. thank u

Posted by james2jain 1 year ago


how to make Automatic light dimmer using LDR?

I tried to make this light dimmer circuit but it's not worked because of my  LDR exploded  why is that..  any similar circuit diagram ? thanks.... This is the circuit i used..

Asked by ishan udyoga 5 years ago  |  last reply 5 years ago


Has anyone ever added a dimmer to a LED clock?

Hi, Can anyone provide some insight into adding a dimmer to an LED clock radio? I've tried out several and the things are all way too bright for my bedroom. I'm a decent soldering tech and I'm very comfy voiding warranties. I didn't post particulars about a clock as I have several. I mainly want to know if anyone has done something similar before I start opened cases.

Posted by ringai 4 years ago  |  last reply 4 years ago


does anyone know how or anywhere on how to make a dimmer switch from raw parts? Answered

I have a dead dimmer, it has capacitors, inductor coil, and some chip in it, was wandering what i can make a new dimmer out of the old one, it could just be the potentiometer, but like, a step by step tutorial on how to make a dimmer switch

Asked by cburgess7x 6 years ago  |  last reply 6 years ago


can I use a wall dimmer switch to control the heat of my soldering iron

or a strip heater for bending plastic made from about 12 inches of heater element from an old toaster or hair dyer? do they use PWM,or just a big variable resitor?

Asked by z28racer 10 years ago  |  last reply 10 years ago


How do I go about making a Lutron 120vac 60hz household dimmer light switch capable to use for 12vdc??

I want to use this switch for examle in my car connect by the accessory or cigarette lighter plug and it will run a 12vdc fan motor i can control cfm/speed.

Asked by KrAx 8 years ago  |  last reply 8 years ago


Attach LED's to (eye)Glasses with the Ability to Dim

Hello,   I'm trying to make eye glasses that are an indicator of how interested I am in what you are saying. (I'm not that big of a jerk, its for an art project ;) ) My idea is to put LED's around the frame that glow brightly when I am interested, and dim to nothing with I'm not.  It's just important to have the in between.  Ideally, this would be controlled by a slide switch dimmer.   The problem is that I really have no idea what I'm doing.  Is this possible? And could someone explain, in the most simple yet informative terms, how to make this work? Thank you!

Posted by JonathanLampron 8 years ago  |  last reply 8 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 10 years ago  |  last reply 10 years ago


can I use a rectifier as a dimmer for halogen light bulbs?

I am wiring a custom exhaust hood, and am wondering if I could use a IN5402 rectifier diode rated at 3 amps, 200 PIV connected in series with a 1.9 amp halogen light load, running at 120 Volts AC in order to dim the lights in the hood at about half bright? Wondering specifically if I will run into any problems with the longevity of the "dimmer", or the life of the bulbs? Also wondering if any one might know how I could make a very simple circuit that could slow a fan down to about half speed. I am using single pole double throw bat handle switches to make a high and low setting. High will just go straight through, and low will go through the dimmer or speed reducing module. Thanks rik

Asked by wirepig 6 years ago  |  last reply 6 years ago


Could I use tip31c transistors to dim LED lights of 0-5w? Answered

Like the Music to LED blinker projects. I was thinking that instead of using the LEDS to blink to the voltage which I think is the peak in voltage. I could use a pot to control the input of voltage and then the transistor could ramp it up like show in the instructable(s). Example: as you increase the voltage with the potientometer the tip31c controls the amount of voltage that is produced. Oh, and by the way im using slide pots, thats why I dont use a light dimmer. If you have any other suggestions of thoughts you are free to say. Thanks Oscar.

Asked by oscarthompson 8 years ago  |  last reply 8 years ago


how to modify a dimmer switch (230V,50Hz supplying 5 incandescent bulbs of 40W each) to get max. brightness variation?

There's a dimmer switch connected to 5 lamps. Problem is the dimmest light occurs halfway of the span of the dimming knob. How do i tinker with the dimmer so the dimmest light occurs nearer the OFF position?

Asked by rammstein2 6 years ago  |  last reply 6 years ago


Electrician help! Dimmer Switch says 'do not use with less than 60 watts'. Why? Answered

I'm looking to run some screen lighting for my projector - but its only 30 watts total (among 5 lights tranformers, tolerant of funky AC)... Will the triac inside not fire properly without load?

Asked by frollard 10 years ago  |  last reply 7 years ago


Wireless controlled (bluetooth/wifi) dimming light bulb

Hello guys! I was wondering if there are dimmable light bulbs in the market that can be controlled over wifi or bluetoooth. I have an idea for a product and an app to control it. Can anyone help? Thanks a lot! Sam

Posted by samumar 6 years ago  |  last reply 6 years ago


Computer room keyboard light

   I want a dimmable low-wattage led lamp to mount to my computer desk shelf. It will sit above the keyboard, shining diffuse light down but not directly at me.    I could mount it underneath with screws, or have it sit on the shelf above, looking over it.    It'll be powered by 120V 60Hz, so no batteries required.    I have two design problems that I need to solve before I start.    First, I need a diffuse light source that will light up my entire keyboard without blinding me with a direct view. This should be a warm white rather than something bluish or cold, since I don't want to lose my night vision. (I watch movies and do graphics on the computer at night.)    I haven't been able to think of anything that will fit back far and high enough that my slouched posture won't cause a problem. I thought of an opaque diffuser that the light would shine up into, but the geometry seems a little tight.    Second, I would like recommendations for the dimmer control. I want to dim the light right down to nothing, and switch it off, easily and quickly for when I'm stumbling off to bed. It needs to be a bit sturdy to handle my fumble-fingered ways, and quick to find.    I appreciate any suggestions anyone can come up with, and I'll be glad to gab on more about what I want if you have any questions.    The shelf is 28" or more from my eyes when seated at the desk, and about 30 degrees of it is currently blind to me at maximum slouchiness. It sits 6.25" above the desk, and I can easily spare 4" of clearance under it; the only other thing that has to fit there is the keyboard itself with a little wiggle room.

Posted by Trelligan 8 years ago  |  last reply 8 years ago


How would you make a 12V light dimmer?

I have a portable 50W light that is run off a 12V 7Ah battery. In some cases the light is too bright so i was wondering what parts i would need to make a dimmer for it.

Asked by somerockenguy 9 years ago  |  last reply 9 years ago


12V 10 watt LED light bulb dimmer?

I'd like to make dimmers for the Phillips EnduraLED 10 watt 12V bulbs. Preferably using slider switches. Like the audio industry uses.? I have a need for a total of 12 dimmers for a feature lighting project on my house.

Asked by lonny j 6 years ago  |  last reply 6 years ago


Why doesn't my RF inline dimmer activate LED strips when powered by a car battery?

I built a 12VDC, 2A lighting system in my truck topper to run off my engine's battery and it works fine unless I add an inline RF dimmer and then it doesn't respond. When the same system is powered by a separate transformer that receives 120VAC and provides 12VDC, 3A the RF dimmer works fine. Any idea how to solve this problem? The system is built with these parts: LED strips amzn.com/B00HSF66JO RF dimmer amzn.com/B00MHKCTLE LED strip transformer amzn.com/B00DKSI0S8

Asked by NickD163 2 years ago  |  last reply 2 years ago


Is it possible to wire two LEDs to a dimmer switch?

Hey guys, Just wondering if anyone know if it is possible to wire two LEDs to some form of dimmer switch. I had one knocking about the shed, but it's house hold with a minimum of 40W ... which is way more than what I need, plus I'd like my setup to be battery powered. I was wondering to kind of, hobby style dimmer switches exist? I quick look on Ebay showed that most LED dimmer switches are wall mountable, and really more for LED bulbs or large strips. Anyone have any ideas? Cheers!  Clare

Posted by codename-3c 6 years ago  |  last reply 6 years ago


LDR and/or PWM for energy efficient 'smart' dimmer?

Is there any way to combine a Light Dependent Resistor or other light sensor with a Pulse width modulator to (energy efficiently) dim indoor lighting in the presence of sufficient natural light?  Thanks!

Asked by bbawco2 8 years ago  |  last reply 8 years ago


what's going on with my LED dimmer circuit? Answered

I'm making a resin block lighting thing for my dorm room, but the lights are too bright to look directly at (and it's meant to be looked at). I decided to make a 555 dimmer circuit, and I used these plans. http://www.555-timer-circuits.com/led-dimmer.html when I built it, however, the LED stayed off. I couldn't figure out what was going on until I touched the two diodes in the circuit and noticed that the small current leaking through my skin caused the LED to blink slowly. I turned one of the diodes around, and lo and behold, the dimmer worked as expected. so what I want to know is: what was the purpose of the diodes in the original diagram? was the positioning of the diodes just an error in the design? should I run with what I have now (since it works), or do something different?

Asked by codongolev 5 years ago  |  last reply 5 years ago


Can someone help me to add a dimmer switch or other temperature controller to my hotplate?

I saw the soldering iron controllers but my hotplate has a switch and I was hoping to put the dimmer right on the unit.  I basically want the coil to run a little cooler.  Thanks for your help!

Asked by GemFOX 9 years ago  |  last reply 9 years ago


Does anyone have any guides on how to make a dimmer for halogen lights? ?

I'm trying to install a dimmer in my car for 2 fog lights. they're about 40 watts each. I would like to be able to dim these bulbs. Thanks.

Asked by krazieboy 9 years ago  |  last reply 9 years ago


What component should I use to modulate an heating pad ? Answered

Rheostat, variable resistor, potentiometer, pulse width modulator, or dimmer, to my understanding I can use any of them to control the heat in my heating wire. I have a 19V 3.16A ouput and my heating wires resistance is 6.6 Ω (1.27 Ω/m). Thanks in advance for your reply.

Asked by ninazz 2 years ago  |  last reply 2 years ago


I was wondering how do I connect a dimmer switch to a 24 hour programmable timer for a faux window. Answered

I was wondering how do I connect a dimmer switch to a 24 hour programmable timer for a faux window. I want it to look as real as possible. So I am looking for sunset and sunrise. Any help would be great! Thank you?

Asked by Claypoolgal 7 years ago  |  last reply 7 years ago



Roberts Clock Radio - dimmer - Model CRD 26

Clock working fine except that when it is dark there is no time displayed and it is obvious that the dimmer is sensitive.Open up the clock by removing four tiny posidrive screws and carefully prising the top and bottom apart. ( preferably with a plastic prising tool to avoid damaging it). Disconnect the supply to clock. Small white two pin plug in the motherboard attached to dimmer. Remove plug and short out (connect together) the two pins that it plugs into. For a simple repair push some aluminium foil trimmed to size (like the thickness of aluminium foil on shop bought mice pies) between them. This will eliminate the dimmer and allow the time to be displayed in the dark. unaffected by the dimmer.. OR simply snip the red and black wires and join them together.These clocks cost about £60.00 so it's worth doing.

Posted by poor1 3 months ago


is it possible to hook a dimmer switch to a cordless tool charger to make it universal for any voltage?

I dont know much about much but i have ideas sometimes lol the question pretty much sums it up useing a dimmer switch for a light in oes house to create a uiversal battery charger for power tools dewalt ryobi bosch etc thanks for ur time

Asked by pytlakw 9 years ago  |  last reply 9 years ago


Motion sensor and dimmer for LED strip 24V DC

Hi I am designing a table lamp using LED strip with 24V DC. I want to use a motion sensor with distance range maximum 20cm and 24V DC. Here is a link that explains what I am looking for. Any one who can custom made this type of sensor?RegardsMehranhttps://f2rq3.app.goo.gl?link=https://app.alibaba....

Posted by ManiA2 7 months ago  |  last reply 7 months ago


12v power supply for 3 circuits? Answered

Hi there I'm trying to build my first led project and found a led dimmer circuit somewhere on the internet, I need to build 3 dimmer circuits, one for red led dimming, one for blue and one for green but i want to use a single power supply for all three, each dimmer needs 12v to run and I only have one 12v power supply, how can i wire the circuits in order to use the only supply i've got? http://www.reuk.co.uk/LED-Dimmer-Circuit.htm this is the dimmer i will build to run 20 led's, the led array draws very little current, less than 175 mA any help or ideas welcome thanks!

Asked by efrarios 8 years ago  |  last reply 8 years ago


Can someone please help with a simple lighting circuit.?

I connected 7 NiMh batteries in series. I connected another set of 7 NiMh in series. Then, I connected the 2 sets together in parallel. A voltage check of the battery pack reads 9.4V. I want to build a miner style light out of it. I'd like to put the battery pack on a belt, and have a control box, also on the belt, with an on/off switch, a dimmer, and a battery recharging connection. I know how to solder and have a basic understanding of electricity. What type dimmer, bulb, etc. would be best? I'd like the light to be as bright as possible, without continually blowing bulbs. Something like this is what I had in mind, but I'm not sure what size/type components to use. Also, am I missing anything? http://i1114.photobucket.com/albums/k522/ALcoonslammer/lightcircuit.jpg

Asked by coon_skinner 7 years ago  |  last reply 7 years ago


USB adafruit trinklet mini > AC voltage regulator ~5W/230v motor?

​ hi folks.. i have this little project running..   what i have: adafruit trinklet mini with 5v ATMEL microcontroller   what i want/need: REGUALTE a small 5w MOTOR using 230v ! (i already have a mechanical potentiometer at 30k ohm attached directly AC.. BUT..)   i know so far with the atmel i can f.ex. control a digital potentimeter 50k ohm, at 5v.. -> only DC no AC (+ i wont get a 1Ampere on 5V working) ------> my little MOTOR uses ~ 22mA on 230V = 5W    and what ive learned so far is that i might need one or two TRIAC or DAC combined with a POTENTIOMETER.. to control AC voltage and/ or an OPTO-ISOLATOR --never heared of that before..   but i have no idea how i should solder that together or will i need some extra RESITORS or CAPACITORS for it?   -> FINALLY i want to flash the ATMEL with a small arduino code and use a USB connection (+own software) pushing the potenial (resistance in the curciut) from 0 to 50k ohm into AC !

Asked by sblocc10 2 years ago  |  last reply 2 years ago


Need 3A Touch Sensitive LED Dimmer circuit.LED voltage is 2.9-3.5,0.7-3A.?

Input should not more then 12volts it is better if circuit works on 5volts,but ON/OFF and dimming will be touch based.

Asked by Faizan Hamayun 7 years ago  |  last reply 7 years ago


Fixing a built-in dimmer on a desk lamp? Aka: Retrofitting a California CFL compliant lamp? Answered

I live in California and just bought a Pottery Barn desk lamp designed to dim. However, because of the new law requiring CFL-compliant lamps, the dimmer has been tampered with to prevent it from actually dimming, even though the switch is the original. I opened the bottom and found the dimmer switch was encased in cardboard. I removed the cardboard, expecting this would fix the problem, but it didn't. Nothing else looks "tampered with." How can I make my lamp dim like it should A picture of the guts is here: http://www.talesofthepack.com/wp-content/uploads/2012/03/lamp-guts-e1332022609831.jpg And the model is here: http://www.potterybarn.com/products/architects-smart-technology-table-lamp/?pkey=ctask-lamps

Asked by RevelryByNight 7 years ago  |  last reply 7 years ago


What can be the problem with this circuit?

I built this Opto Sensitive Dimmer's dimmer part first just one led the Orange is light. but can be the problem? I built this on a test board so sorry for the soldering.

Posted by bothbence62 4 months ago  |  last reply 4 months ago