Questions tagged [dimmer]

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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 ...
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)...
5
votes
2answers
798 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 ...
5
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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
1k 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 ...
5
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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-...
5
votes
1answer
184 views

230VAC dimmer MOSFET failure at surge test

Our dimmer prototypes work fine, but fails surge test, as per 61000-4-5, 1/50us. Circuit is isolated dimmer for 230VAC different types of bulbs. It uses 2x N MOSFET as switch. V503 detects zero ...
4
votes
6answers
23k views

LED lamps keep glowing when dimmer is turned off

For starters, I am not electrically capable, so bear with me. But, I did read similar questions that did not address, as far as I could tell, what I see happening (they may have, but I was too ...
4
votes
1answer
343 views

240V PCB Layout - Critique on design requested

Hi all, I was wondering if I could get some critique on my first PCB layout. The schematic is a direct copy from here. It is for a 240V Dimmer 10A, and I am after comments on my PCB design. For ...
4
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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 ...
3
votes
2answers
475 views

Would it damage a tile saw if I used a a dimmer switch on it? [closed]

It's a 10 inch Ridgid wet tile saw from home depot. I have a dimmer light switch, and I was hoping to use it to slow the saw down about half the regular speed. Would doing this damage the motor or ...
3
votes
2answers
923 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 ...
3
votes
1answer
317 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 ...
3
votes
2answers
1k 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" ...
3
votes
1answer
60 views

Questions regarding eliminating hysteresis in ac dimmer

In the following circuit it says: “This hysteresis effect can be eliminated however, using the circuit from a detailed application note from Littelfuse shown in Fig. 6.4.4. Here the capacitor C1 is ...
3
votes
2answers
2k 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 ...
3
votes
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 ...
3
votes
1answer
622 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
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 ...
2
votes
1answer
685 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
5answers
143 views

vintage auto headlamp dimming

I am restoring a 1930 Stutz, the headlamps originally used a resistor to dim the single filament bulbs from high to low beam. The vehicle is now 12 volts, to dim the lamps the correct amount I have ...
2
votes
1answer
2k views

What is the rectifier's role in this AC dimmer circuit?

Here is a typical AC dimmer circuit: http://www.eleccircuit.com/wp-content/uploads/2010/09/light-ac-dimmer-120watt.jpg I just came across another variant which uses a rectifier: http://www....
2
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3answers
2k views

What mechanism controls a ceiling fan speed?

Are all ceiling fans AC induction motors? Since any ceiling fan can accept any off-the-shelf fan dimmer switch and any wireless remote unit that fits in the base, that means they've all got something ...
2
votes
2answers
2k views

Problems with a back-to-back MOSFET dimmer for 230VAC

I've been trying, unsuccessfully, to dim a 60W incandescent light bulb with two back-to-back MOSFETs, similar to this web page: http://easy-electronics4u.blogspot.co.uk/2012/02/switch-ac-loads-using-...
2
votes
3answers
6k views

speed control of induction motor using dimmer

i want to control the speed of induction motor single phase (about 1.5 kw / 2 hp \ 220 volt \ 50 hz and 1400rpm) using dimmer(triac) , i try this circuit i chang the value of C1 to get best control ...
2
votes
2answers
1k views

Multiple channel independent AC dimmer using Arduino

I want to build a 8 channel, independently controlled AC dimmer using Arduino. I have successfully tested a single channel dimmer but i am stuck in expanding it to 8 channels. The circuit I am ...
2
votes
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 ...
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 ...
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 ...
2
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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 ...
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
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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)....
1
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4answers
725 views

Why do lights get brighter when I turn on the hair dryer?

Intuitively, the hair dryer sucks power out of the wires, causing a voltage drop, causing the lights to dim. But the opposite happens: the lights get brighter. These are LED bulbs. It is the ...
1
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3answers
2k views

0-10V Digital Rheostat for LED Dimmer?

I have an LED light with a power supply that follows the ISO 60929 0-10V standard for dimming. The manufacturer says "the power supply is current sourcing, and is roughly 0.5mA." The following ...
1
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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 ...
1
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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 ...
1
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2answers
187 views

What is the purpose of diode in parallel with the resistor divider in MOSFET gate driving circuit

I have built several 200W AC dimmers using Microchip 8-bit CPU and the illustrated back-to-back MOSFET circuit. I have seen on Internet schematics with the D1 diode in parallel with the R1 resistor, ...
1
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1answer
109 views

Why triac output goes higher than line 230-240 voltage in AC dimmer circuit?

I am using AC dimmer circuit using arduino. circuit is working normally but the only problem is about voltage. as the dimmer circuit varies dimming,the output voltage also increases and decrease. Line ...
1
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1answer
799 views

Best Lamp Dimming Circuit? [closed]

What's the best way to dim a lamp, and why? Also, which method is typically used in most typical residential dimmers? I originally thought it was as simple as wiring a potentiometer between the source ...
1
vote
2answers
608 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
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1answer
68 views

Why does this dimmer switch have reduced wattage capability for LED / CFL bulbs?

The Lutron "Maestro C•L" dimmer has different wattage ratings depending on the type(s) of bulbs being controlled. Its an electronic dimmer. Specifically, when 100% incandescent or halogen it can ...
1
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1answer
575 views

Analog Dimmer Circuit Analysis

I am trying to analyse the basic circuit of a dimmer. I don't have much experience in AC circuits, so I am not sure how do I need to proceed. My circuit is the next: I have something like this: I ...
1
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1answer
762 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 ...
1
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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 ...
1
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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, ...
1
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2answers
3k views

How to use SCR to control the power of a heater

I would like to point out that I am not an expert (as it is perceived by the question) in the use of scr, diac, and triac and that this question is more for academic purposes than use in real life. ...
1
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1answer
874 views

Replace potentiometer with resistor

Can I replace the potentiometer in this AC dimmer circuit with a fixed resistor so that I can get a permanent dim setting?. If yes then how. Components in this circuit are The parts used are WH149-...
1
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1answer
654 views

Bi-color LED Intensity + Color Control

Full transparency, I'm a cinematographer, not an engineer, so forgive my ignorance here! I'm attempting to make an inline dimmer for small bi-color LED strips and fixtures. I have larger, more ...
1
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1answer
329 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 ...
1
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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 ...