Questions tagged [dimmer]
The dimmer tag has no usage guidance.
225
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PWM LED strip dimmer induces noise in power supply
I've developed a PWM dimmer to dim 100W of LED strips. As I dim it to low PWM values, the power supply begins to hum. I have tried to use also higher PWM frequencies of up to 30kHz, but the problem ...
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1
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AC Motor Control circuit not working in Proteus
I am new to 555 Timers, Triacs and Proteus and I need help to fix a circuit I have built. The intended function of the circuit is as follows.
Two 555 Timers are used to produce variable duty cycle 0-...
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1
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110
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How to dim an LED with a 10 k potentiometer?
I would like to know how to use a 10 k potentiometer with a small LED. Each time I try, the LED won't turn off completely and also it used only 20% of the potentiometer. I would like to be able to ...
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Dimming a constant current LED after the LED Driver?
I want to get a constant current LED tube. This particular model is made by toggled. And I would like to hijack it and place some sort of a dimming device AFTER the LED driver and before the LED ...
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2
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157
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Modify LED headlight with buck converter, to make it dimmable
I only know enough in electronics to be dangerous.
Is there a way to modify this LED board to make it have a dimmable setting?
I was hoping to just remove a resistor and replace it with a variable or ...
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2
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Snubber Filter Circuit Not Working Triac Dimmer
Hi I am working on a project using a triac to do phase control dimming of 120V ac powered devices. I recently translated my project from perfboard to SMT using an SMT fabrication service. The project ...
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How are standard consumer LED dimmers built?
What would be a circuit of a shelf consumer LED dimmer that works, let’s say, with a potentiometer? Is it important/more efficient to have the dimmer circuit integrated with the 230V mains to 12V/24V ...
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1
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Can I plug directly a 0-10Vdc dimmer current for LED to a SMD4051?
I have a LED dimmer which generates a 0-10 Vdc, can I connect it directly to a SMD4051 such as the Onsemi (on Reichelt) (documentation)?
If I understand well, the plexed current must be below the DC ...
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Can a 12 V LED dimmer be used with a 6 V incandescent load? [closed]
Can a 12 V LED dimmer be used with a 6 V incandescent load?
I'd be interested in knowing what factors make such an arrangement suitable or unsuitable.
Specific example: I bought a 12 V, 60 W Dimmer ...
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AC PWM Dimmer with Arduino, but the light is on even when Arduino is off
I'm trying to build an AC dimmer using Arduino Uno microcontroller.
I tested a few options and came up with the circuit below which works perfectly fine:
The only problem with this circuit is the ...
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relays 5V 10A and 12V 30V stop working after a few days of use
We built a system for heating 3 bioelectrochemical reactors, but after a certain time of operation the system starts to heat up. We identified that when this occurs, the relay works despite the light ...
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Phase cut dimming driver for panel lights having occasional flick
I am designing a phase-cut dimming driver for Incandescent bulbs as well as LED panel lights with dimmable drivers.
Using a BTA24 Triac and VOT8121AB Optocoupler driven by my MCU.
For zero-cross ...
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How to protect potentiometer in adjustable soldering iron?
I have an adjustable soldering iron and noticed that recently at some position of the adjustment potentiometer (R3 in the schematic below, this is the potentiometer ...
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4x 12V LED strips in parallel with dimmers on 8xAA batteries?
I've built a play kitchen for my kids and would like to make the stove and oven light up.
It's been a long time since I've done electronic tinkering so wanted to check I've done my homework right.
The ...
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116
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Fan humming sound when decreasing speed with a dimmer [closed]
I am using a ~large 400mm wall mounted metalic fan (specs below).
I wanted to decrease the speed (and noise) with light dimmers (I tried 2 models so far) but when speed is decreased it makes humming ...
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What is this IC for motor driver?
I have a 220 V motor driver and I think it is a dimmer from its bt138 TRIAC (it goes to a 220-24 transformer and then to the motor) and its IC surface is erased and expunged and I don't know its ...
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119
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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 ...
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731
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Arduino PWM LED lights dimmer using MOSFET - Rise time problem
I’ve made a simple PWM dimmer for LED lights (50W) using IRLZ44N MOSFET and Arduino Uno. PWM frequency is 490 Hz. The Arduino is programmed in a way that dimming tries to mimic daylight using ...
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4
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1k
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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 ...
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Circuit design to dimmer a 15W led with ESP32
I'm new here! I'm designing an electronic circuit to control a led light (switch on/off and dimmer) in my room with homekit integration (iOS home).
So first of all I don't want to spend a lot of money ...
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0
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184
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Operate and speed control a 230V 50Hz AC Ceiling Fan with Power MOSFET based Dimmer Circuit
I am trying to control the speed of ceiling fan at my home using a power MOSFET based dimmer circuit.
The ceiling fan operates at 230V AC and can consume maximum 50 to 75 Watts power.
The circuit ...
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1
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87
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Convert 24VAC SCR Dimmed to LED
Hello I have been working on this for many months, many parts, circuits, etc. I dont know if its even possible. I have a 24V A/C source lighting fixture that uses two SCRs in anti-parallel for dimming....
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why capacitor with triac?
Could someone please explain why there is a capacitor (C3 10nF 400V) parallel with main terminal pins of the triac (VS2 BT136)? Please see the schematic photo.
This is a soft start circuit for AC ...
user284562
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74
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Use household power strip for 12V/24V power
I have a 12V/24V dimmer (rated 60W) and need to hook up 8 different lights, can I just use a regular power strip to distribute the 12V/24V? the power strip of course says 230V on it, but does it ...
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122
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Problems with low-side MOSFET in 12V LED dimming switch
I'm pretty new to electrics/electronics. I'm sorry if I make dumb questions, and thank you for your time.
I wanted to control my LED strip shipped from Ebay, which works well with 12V 2A DC adapter. ...
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67
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Can I connect a wall switch to DC?
simulate this circuit – Schematic created using CircuitLab
I am making an air blower with a Kingwin RL4B-B1402512H fan. Can I use the wall switch, and if so, can I use the dimmer as well?
user279966
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0
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IGBT trailing edge dimmer: the LED bulb only lights up around 40%, strange wave form before that, please advise what is causing that
I built a trailing edge dimmer with IGBT, and I am driving it using Raspberry Pi 3.
The circuit mostly works, but I noticed some strange behavior, that I can't put my finger on.
Please could you help ...
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Adjusting voltage to non-dimmable LED lamps
Some commercially available LED lamps are considered non-dimmable. Traditional phase-control dimmers don't work well with them.
Would the behavior of such lamps be different if a full sine wave AC ...
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Two dimmers controlling LED strips and blinkig at certain levels
I have two LED strips powered via two dimmers, like so:
Certain combinations of dimming on both dimmers lead to the LED strips blinking. The level of blinking is not deep, maybe 15-20% of brightness, ...
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606
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Debugging burned out TRIAC for vacuum cleaner motor speed control (inductive load)
I have tried to use speed control for vacuum cleaner like below (2000W):
I have tried this circuit with two different control methods for the TRIAC (BTA24 -24A):
Arduino base by MOC3063
DIAC for ...
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245
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Modifying a sliding foot dimmer KFD-527G for LED bulbs
I replaced the incandescent bulbs of a living room floor lamp with LEDs. This lamp was equipped with a sliding foot dimmer but since then, even when I put it on the minimum position, the LEDs do not ...
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FL5150 Multi channel dimmer
I'm looking to design a four channel dimmer using the On Semi FL5150/FL5160 dimmer chip.
This will be controlled by a digital signal sent over an isolated I2C interface, with my initial design using ...
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230V AC triac dimmer for single phase motor and LED lightbulbs
I successfully developed produced my first AC Triac dimmer board, which works fine on resistive load like regular light bulbs. It also works fine for an AC motor the last 2 years. However, in order to ...
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Christmas LED dimming circuit with potentiometer
I need help.
I would like to dim LEDS of a Christmas tree with a potentiometer.
Here is my electric diagram. (Please note I'm a beginner in electronics.)
I don't know how to choose a good value for ...
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487
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Perfect AC sinusoidal wave dimmer with PWM from micro-controller
I am designing a circuit for controlling speed of a AC fan using Arduino UNO, this is how the circuit looks like .
In this circuit the waveform generated for load is not perfectly sinusoidal,what i ...
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How can I fix this LED dimmer circuit?
simulate this circuit – Schematic created using CircuitLab
The circuit reverse-engineered above is a LED dimmer which is driven by 555 timer in astable mode which then drives an op-amp to ...
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Why are capacitors needed in dimmer circuits?
In a circuit like the one below, why is capacitor C1 needed? I mean I can make do with just a resistor and pot to attenuate the voltage to some level suitable for switching.
What does using capacitors ...
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Can a feed wire also be used as a relay trigger?
Can I use a low voltage wire (10.5 V) as a supply AND trigger With a single pole double throw relay? Is there a solid state option available?
I need a way to switch power back and fourth to LED lights ...
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0
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LED spot circuit sanity check
I, an inexperienced but curious and willing person, would like to have 4 LED spots managed together by 1 driver and a smart dimmer, but I would like to check if my plan is sound before turning $100+€ ...
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2
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How does this off-dim-bright lamp three-position rotary switch work?
I have this UBERHAUS floor lamp, with a single-filament, two-terminal bulb. They have a rotary switch in the tube (stem) that turns clockwise to three positions: off -> dim -> bright -> off.
...
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Could I use the foot pedal of an electric sewing machine to control the speed of rotary tools? [closed]
I am searching for a solution for powering power tools with lower noise levels. I live in an apartment and have many neighbors around me. When I have little projects, I don't want to disturb my ...
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558
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How can I regulate brightness of a LED strip with a potentiometer
I have a 12V, 5m long LED strip and an adapter (12V 1A). I want to control the brightness of the LED strip with a potentiometer, I found a simple circuit that involves only a pot and IRFZ44N ...
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RC Snubber connection
I'm going to use this AC Dimmer Module with an inductive load, so I plan to help it by adding an RC Snubber Module. Most of the schemes show that the best way to use an RC snubber is to connect it ...
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Can you dim already dimmed LED lights
Ive installed LED downlights in my room, these :
https://www.screwfix.com/p/lap-fixed-led-downlight-contractor-pack-white-370lm-5w-220-240v-10-pack/728fj
they are controller via a smart dimmer switch, ...
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150
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Will adding a resistive load to a lighting circuit stop my electronic dimmer from leaking current to my LEDs?
I changed my bedroom lights yesterday for 220V 7W dimmable LED lights.
My bedroom dimmer is an electronic type (LightwaveRF).
In the pitch black, last night, I could see the lights faintly glowing/...
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215
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Arduino based triac dimmer bulb flicker fix on touching Arduino ground
I've designed a triac based dimmer circuit. It is working just fine except the bulb is flickering on dimming (working fine with full brightness). Bulb I am using is filament based and dims perfectly ...
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4000W Dimmer Eagle PCB Design
I am trying to learn how to design PCBs, and for that purpose I am copying the simplest PCB I could found, a 4000W Dimmer:
The Squematic is this:
It has the next components:
1 TRIAC BTA416008 (...
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70
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Simple dimmer for led light
I am looking for a simple mini rotating dimmer I can buy for a 5v to 8v circuit.
Can I just connect a potentiometer to the LED and make it work?
Is for 16 parallel 1 watts LEDs powered by 4 AA battery ...
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How to determine LED dimming method
I'm just starting to get my feet wet with electronics so please pardon my ignorance. I bought an LED light-bar to mount to my mountain-bike for some night riding: https://www.korrlighting.com.au/...
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734
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How can I dim 50 high-power LEDs in series with an Arduino?
What I'm trying to do is to use an Arduino to control the brightness of two series of 50 high-power LEDs independently.
Each series has an independent LED driver, and each LED has a foward voltage ...
