Questions tagged [dimmer]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
-1
votes
2answers
4k views

Need circuit to Switch 240v a.c. mains with 3v or 5v

I have the IRFP460 power transistor which if I understand correctly can switch 20A/500V on 20v input. I am wondering what a circuit design would look like that would allow me to either (a) switch ...
0
votes
1answer
2k views

multi channel ac dimmer for arduino

I have been looking for a simple ac dimmer circuit to use with my arduino and/or raspberry pi. I have used the TLC 5940 PWM Driver before just to control LEDs and I wanted to adapt this to controlling ...
3
votes
2answers
947 views

How can a light dimmer in series modulate a load?

Not after a full breakdown of how this specific light dimmer works, but rather how a device in series can control a load. A light dimmer has the following wiring diagram. As you can see, the light ...
0
votes
1answer
573 views

Touch dimmer with low voltage transformers, needs incandescent to work? Updated!

I've looked extensively about this topic, and can't find any answers. Hopefully someone on here can help. I live in Texas and have 120V power in my house. I'm using a lamp touch dimmer to dim two ...
1
vote
2answers
644 views

How to replace the rectangle(DIP) bridge rectifier with round one.

I want to make an AC dimmer and the circuit diagram from the instructables uses a bridge rectifier which is in DIP package and rectangle in shape and the rectifier which I have is round one, so how ...
1
vote
3answers
2k views

How fast should a Triac be switched for a dimming application?

I want to create a dimmer using a Triac - it will have a duty cycle where it is on for x% of the time, and then off for Y% of the time - my question is how often should this on/off cycle happen? I ...
0
votes
1answer
148 views

How to make a dimmer for a 11W CFL?

I have a desk lamp, that uses 11W/827 CFLs (current one is an Osram Dulux S) The lamp uses a power supply ("Type BL1"), but it seems the transformer acts more like an AC/AC power converter, as it ...
0
votes
3answers
876 views

Lamp flickers if dimmed up to an extent

I used circuit shown in this instructable to make an AC dimmer but everything goes fine if not dimmed much but then it starts flickering because of voltage fluctuation. http://www.instructables.com/...
0
votes
4answers
11k views

Controlling a 1000W radiant heating element with dimmers

First I would like to mention that I am a stranger to electrical components and I come from a mechanical engineering background so please keep that in mind when answering my question. I am trying to ...
1
vote
1answer
107 views

Can this dimmer really handle 144W?

I was looking for a dimmer to control an LED strip with following characteristics: 5 meters long 14,4W (max) per meter, so 72W in total 24V I found a dimmer on ebay that says it can handle 144W, ...
2
votes
2answers
1k views

3-way dimmer switch schematic

I am building an AC dimmer circuit to control from an Arduino using this schematic: I need to make this dimmer so that it can be used as a three way switch as well. How would I modify this circuit ...
1
vote
1answer
578 views

Would this be ok to control the speed of a PC fan? [closed]

I have a 240mm PC fan connected to a 12v adapter. The fan is quite noisy and i would like to have the option to turn the speed up/down or off completely. The Fan is: Current (A): 0.18 The 12v Mains ...
1
vote
1answer
3k views

Discrete lamp dimmer circuit: how to choose component values?

As you can see, the VAR is 500K Ohms, the capacitor is 100nF. (AC voltage = 220V, freq = 50Hz) I already built this circuit and it works perfectly. Can anyone show me how those values were chosen? ...
0
votes
1answer
239 views

How to turn a wired dimmer into a wireless one? [closed]

I'm working on a personal project for residential automation. I want to make a wireless Arduino controlled dimmer. I followed this tutorial and I made my dimmer, but it's wired. Below is the circuit ...
0
votes
1answer
279 views

Dimmer under potential but no load

I have an idea for wiring the lights in a room, which I have run past a few electrician friends, and have received contradictory and unsure answers. There is a large room with two sets of lights - ...
1
vote
3answers
8k views

Permanently dimming an incandescent light bulb

I have purchased a nice light bulb with long visible wires/resistors and plugged it in, on the ceiling. It burns too bright without a dimmer and does not look as intended (also the lifespan decreases)....
0
votes
1answer
451 views

Tech stereo damaged by dimmer switch outlet, why? [closed]

A low end Tech stereo was plugged into an electronic dimmer switch outlet. The stereo was only a few years old and was functioning properly prior to plugging into a dimmer controlled outlet. I ...
1
vote
1answer
3k views

Arduino Controlled AC Dimmer Circuit

I can easily switch on and off a 220V source using an electromechanical relay. But I am now looking for a much more versatile solution. Something that can not only switch the source on/off but also ...
2
votes
1answer
1k views

Problems running a triac dimmer off a UPS

I built a circuit (like the one below) to control an incandescent light bulb from an Arduino controller for the digital input. I did not use the zero crossing part of the circuit and mine is running ...
3
votes
1answer
697 views

type of capacitor (0.01uf) for this circuit?

I'm having difficulty sourcing the correct/safe capacitor for this circuit (despite my research). I know it should be 0.01uf and is being used in a 120v AC (upto 10amp) circuit. Schematic below. Also ...
2
votes
1answer
769 views

What happens when you dim a wall wart?

I am hooking a wall wart to a plug on a dimmer switch which is hooked to some LEDs and a resistor to create a LED "lamp." What will happen when I dim the switch? Will it reduce the voltage? The ...
2
votes
2answers
1k views

Dimming USB Led Lamp

Currently I have a project that consist in the following: We have 2 USB Led lamps. (e.g 13 leds, 5V, ~200mA) To these lamps, we would like to control the intensity of the light, through a Raspberry ...
1
vote
0answers
8k views

arduino + optotriac based ac dimmer blinking severely

I try to build a dimmer with arduino phase control and triac. I followed the schematic from http://www.instructables.com/id/Arduino-controlled-light-dimmer-The-circuit. Now I used the software ...
1
vote
1answer
141 views

Is AC Dimmer on Vector Board trouble?

I'm building an AC Dimmer based on this circuit (linked) and am considering using a Vector board instead of making a PCB. Does anyone foresee any issues with this? Particularly regarding 120v ...
4
votes
2answers
6k views

How to Dim HID Lamps

I am building a street lamp controller that should be able to set a street lamp to on, off, or dim state. I have successfully built an incandescent lamp dimmer (phase dimming - using zero cross ...
5
votes
4answers
20k views

Arduino 230v Light bulb dimming

Hey guys i have done a lot of research and testing on different circuits for 230v(50hz) or 220v light dimming, but i cant get my arduino to dim my light. This is the last thing i tried. made this ...
5
votes
2answers
2k views

Can electronics be damaged by plugging into a lighting dimmer circuit?

So my stupid room is wired so all of the lower receptacles are driven from the electronic wall dimmer. Stupid me plugged in my brand spanking new brother laser printer into the lower receptacle. It ...
6
votes
2answers
3k views

Dimmer to bulb control

I need to control a bulb of 220V, with different intensity light levels. I've an Arduino Uno Board, which receives a variable voltage from a Light-to-voltage converter (TSL12S) (Like a photoresistance)...
0
votes
1answer
5k views

is there any spice model for optoisolator triac driver circuit?

I have to design a phase angle dimmer using a triac. For this, I have read How do I drive a TRIAC from a microcontroller (for low voltages)? This forum really turns out to give me a good solution .....
5
votes
4answers
11k views

Building AC dimmer - digitally controlled

I'm looking for help about making a design for a digitally controlled AC dimmer to control some AC lamp light intensity. I've searched for ideas and found these: http://www.inmojo.com/store/inmojo-...
8
votes
1answer
2k views

How do the different kind of lamp dimmers work

Hooked up the scope to a dimmer expecting to see how it altered the waveform, and didn't see it do much of any difference from all the way down to all the way up. I bought an LED bulb and was told it ...
3
votes
1answer
336 views

Can anyone identify this component?

I'm trying to solder together a small LED array with a dimming knob out of a bunch of old parts I have laying around, but I can't seem to identify how to wire this component: The two connectors at ...
1
vote
1answer
414 views

Help with connecting electromagnet to dimmer

I have an electromagnetic powered off a AA battery. Is there some kind of dimmer switch or similar item that would allow me to control the amount of power going to the electromagnet?
2
votes
1answer
4k views

What are the extra components in this dimmer for?

This is a four-component-dimmer (R, C, diac, triac) with an extra diode bridge and resistors R2 and R3. What are they for? I've never seen those before. It looks like the resistors are just parallel ...

1 2 3
4