Questions tagged [dimmer]

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1answer
555 views

Arduino AC dimmer, with Wall switch control

I'm building an AC dimmer with arduino, but I also want to have the ability to control the lamp from the wall switch (just on/off, with no dimming). What is the best way to achieve this? Do I also ...
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2answers
2k views

Zero-Cross detector problem

I am really in a tough situation and need very serious elaborative help with this. Almost like spoon-feeding. It's been days I've been trying to get my zero cross detector (and the triac dimmer) to ...
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1answer
4k views

Working of optoisolator MOC3041 & triac connection

1) Pl help me with the working of optoisolator MOC3041 & MOC3020. Also its use in ac dimmer apart from isolation 2) Also as triac(BT136) are bidirectional how does the term "reversed" ...
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1answer
747 views

Best way to convert 5V DC to 110V AC at 50Hz for pdlc film drawing 2mA max. Size is the thing!

I'm working on a project in which I'm hoping to integrate several small segments of pdlc film, which starts off diffuse white/'frosted', turns clear when excited with 110V AC at 50Hz and is apparently ...
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2answers
3k views

AC dimmer- triggering triac using moc3041. lamp always remain on, and does not change its intensity

Below is schematic. 1) Problem is lamp always remains on,even if i haven't provided the Anode A terminal with power through micro controller. 2) Also please explain me the need for R7 resistor. 3) ...
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2answers
62 views

Ground wire in custom capacitance-dimmable metal lighting fixture

I'm wanting to design my own lighting fixtures, both for cost effectiveness as well as the design appeal (inspired by a particular designer's lighting fixtures) that uses a wooden base with metal ...
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1answer
482 views

Automatic Temperature Controller with Thermistor (Incandescent BULB)

I'm new in this site And sorry for my english language.. I need a circuit for my little oven. I use an incandescent bulb (4x100W) for heating, and I want make a dimmer circuit to change output using ...
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3answers
87 views

Reading a Light Dimmer from a Netduino

I know there are lots of questions and instructions on how to use a netduino (a variation of the arduino) as a dimmer. But all I would like to do is read the output of a light dimmer with my netduino. ...
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2answers
2k views

What are the risks of powering fan AC motor with Triac dimmer?

I'm going to replace current resistor potentiometer with arduino-controlled triac scheme, probably this module. I'm going to load it with 6 motors , 300W each. How bad the EMI gonna be (would I be ...
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2answers
996 views

What good is an induction coil in a dimmer switch?

I asked about a dimmer switch, and was told one has an induction coil. What benefit is an induction coil in a dimmer switch? ZE-02S has induction coil built-in on the circuit board, so it is 5/8" ...
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1answer
75 views

Should serial triac dimmers work for resistive load?

I have a cheap 120V hot plate that I assume regulates its temperature using a triac dimmer (because the heating element vibrates/hums at lower settings). But at its lowest setting it still gets too ...
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1answer
615 views

SSR not switching dimmed load

I have a system where there is a "master dimmer" (an 800W dimmer designed for household lighting). From that master dimmer, I have a few SSRs switching 40W incandescent light bulbs. The idea being ...
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4answers
3k views

LED dimmer for high current applications

Hi Guys .. I am designing a few panels using LEDs for backlighting. Some of these panels have over 20 leds, using a 5v power source. So only one of these panels can draw around 500mA alone. I am ...
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3answers
5k views

Light dimming regulator circuit

Here in this circuit, We have the load connected to a diac and triac circuit along with a variable resistance and a capacitor. When the circuit operation begins initially, the energy is stored in ...
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2answers
792 views

Part identification in this dimmer switch

The dimmer in question is a 3 poll LEVITION 600 watt 120VAC 60HZ dimmer. The three red boxes in the picture below are what I'm questioning. What are those three pieces (and what do they do). Here are ...
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2answers
1k views

Triac-Diac Dimmer build

I recently bought a DIY 1000W AC motor dimmer meant to be powered off 220-240VAC. I was hoping to use this to control a transformer which in turn powers a heating element. The heating element needs ...
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1answer
243 views

Triac dimmer component

I was looking for a way to dim a regular light bulb in a circuit. With the help of this site, I learned that using (variable) resistors would dim the light, but eat up electricity in the form of heat. ...
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2answers
2k views

Dim a regular light bulb

I recently bought a nice looking regular light bulb, commonly refered to as "Edison bulb". http://edisonlightglobes.com/Shop/wp-content/uploads/2013/03/Full-set-Bulbs.jpg I was hoping to find a way ...
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1answer
609 views

Controlling LED Bulb Dimmer via Microcontroller

I have several (Cree LED bulbs) that I would like to dim via microcontroller. According to Cree the bulbs are dimmable with compatible dimmers. A local hardware store here in Canada has one of the ...
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1answer
241 views

Using two Arduino dimmer's on two lamps using one eletrical grid

I'm following a tutorial to build this dimmer module. After testing it with a lamp, everything worked well. Then I tried to move forward, making two dimmer modules to control two lamps. I'm making ...
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1answer
486 views

Gate controlled turn-on time

Under DYNAMIC CHARACTERISTICS for BT137 is Tgt value set to typically 2us. If I then look under BTA16, I see no mention of the pulse width. Is there a minimum pulse width as a standard value for all ...
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1answer
319 views

Considerations when repairing dimmer switch

I originally asked this question on DIY StackExchange. So far no answers and a suggestion to try on Electronnics, so here goes: I have an IKEA lamp with dimmer switch which took a knock and ...
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3answers
2k views

PIC16F676 - Is it possible to add a dimmer circuit to the seven segment displays

I am attempting to build a PIC16F676 based voltmeter using 3 multiplexed common-anode seven segment displays. Is it possible to add a light activated dimmer to control brightness of the displays ...
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1answer
1k views

Need to make sure Thyristor switches off with rectified AC

So I have full-wave rectified AC from mains and the following circuit which is basically a AC dimmer that takes slices of that for a much lower total average voltage. (Voltage source is labeled as ...
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0answers
76 views

Need help picking components for a stir plate [closed]

I was going to make a stir plate to grow yeast for brewing beer. It involves using some type of housing (cigar box, wooden box), wiring some DC voltage to a switch, to a dimmer controller, to a PC ...
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1answer
254 views

AC DC adapter voltage regulation

I would like to make a dimmer for several ikea desktop LED lights. This one is plugged on a LED driver (adapter) with specifications: Primary:220-240VAC 50/60Mhz, 0.06A Secondary: constant current: DC ...
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2answers
600 views

12 Volts or Nothing

Hello so I am hooking up a LED strip to my car but I am having trouble with the dimmer on the dashboard. To make this very simple and easy what I am trying to achieve is to cut off the power from the ...
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1answer
596 views

Dimmer Switch For A NeoPixel Ring

I purchased a set of 4 NeoPixel ring segments and assembled them into a circle. I am trying to create a circular lamp that will be fitted inside a camper van in the ceiling and driven from a 12V ...
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1answer
754 views

PWM or Phase Control Dimming?

I want to dim a lamp around 70W or more using arduino. I have found two ways for doing that. The first one is to make a circuit that "cuts" the sine wave and produce the dimming effect (link). The ...
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2answers
960 views

install a dimmer to a non dimmable led strip [closed]

I have a led strip installed. the type is 5050 14.4 watts/meter. I do not know if it is dimmable or not. What happens if i install a dimmer to the strip and it is not dimmable?
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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 ...
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1answer
1k 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 ...
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2answers
917 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 ...
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1answer
554 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 ...
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2answers
591 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 ...
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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 ...
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1answer
140 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 ...
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3answers
779 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/...
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4answers
9k 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 ...
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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, ...
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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 ...
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1answer
467 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 ...
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1answer
2k 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? ...
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1answer
232 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 ...
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1answer
252 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 - ...
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3answers
7k 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)....
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1answer
410 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 ...
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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 ...
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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 ...
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1answer
616 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 ...