Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [dimmer]

256 questions
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4 answers

Powering and dimming a few hundred light bulbs

I want to power a very large light fixture: it has 273 G4 socket light bulbs. The bulbs I found for the thing are 12 V 5 W ones, incandescent. So the question is how to power the beast (as it is 1365 W of power), and how can I dim the whole…
A. Daty
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Night light broke after trying to dim LEDs

I purchased a cheap night light that plugs directly into a 240V wall outlet. It has three color changing LEDs. The problem was, those LEDs were way too bright. I decided to modify that night light a little, so they're not as bright. The…
polemon
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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 needs a "special" CL dimmer. How do the…
boatcoder
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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). Depending of the received voltage in the…
Eduardo
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4 answers

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 circuit : Circuit and Code Link Code which i…
Daniel Euchar
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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 was working fine, other than a bit of a buzz coming…
user1304223
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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 crossings. N504/N505 are isolated drivers, in parallel…
Bogumil
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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…
mina_g
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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 illiterate to understand). I hired an electrician to…
R Munson
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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 some more pictures of the dimmer switch. This is…
David
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Dimmer for 2 halogen headlights

I have two halogen automobile headlights (12v, 65 watt) that I’m using to make a wall hanging. I want to be able to dim the lights with a dimmer that I can have on a side table. I have a transformer to go from wall outlet to 12v, but what type of…
Chris
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P-channel FET won't turn off from micro

I'm having an issue with what I think is a standard high-side PWM LED dimmer circuit. It uses a P-channel FET ATP304-TL-H and gets an input voltage of anywhere from 9 V to 16 V. The Zener diode across the gate and source is 16 V to prevent exceeding…
pbandjazz
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How do I control the sensitivity range of an LDR-controlled LED?

I'm trying to make an LED dim according to the ambient light (darker ambient -> brighter LED), through use of an LDR. I'm using a voltage divider with an NPN transistor (BUL38D). I've tried multiple values for each of the resistors shown, but always…
Guilherme Gaspar
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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 detector, AVR microcontroller, and controllable TRIAC…
bonchenko
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TRIAC phase angle control 120 VAC line ripple

I'm working on a phase angle controlled TRIAC dimming circuit (schematic attached below), and I'm seeing a lot of ripple/noise on the 120 VAC input as I near 50% power. I'm wondering what I can do in my circuit to possibly clean the line to reduce…
JesseBuesking
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