Questions tagged [dimmer]
The dimmer tag has no usage guidance.
258
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Firing TRIAC / AC Light DIMMER module
I am currently testing the AC light dimmer with a blower fan output that has a specification of 220V 0.45A. When the trigger angle is set to 0, why does the output of the AC light dimmer allow a ...
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Electronic Dimmers for Halogen Lights [closed]
I am attempting to find an electronic dimmer for a 120Vac halogen light. Looking at leading edge (TRIAC) and trailing edge dimmers, is one type more suitable than the other for halogen lights?
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2
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Dim a 158V DC Led
I bought a led lamp and it's too bright. When I saw the converter, it's not a standard 12 or 24 VDC one. it's a 120-215 VDC; Picture attached. I didn't trust that. Borrowed a multimeter and checked, ...
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3
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39
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Help with a VCR for Triac dimmer circuit
I’d like to replace the potentiometer component (RV1) of a typical triac dimmer circuit with a voltage controlled resistor. The DC control voltage has a range of probably about 1 mV - 2.5 V. It seems ...
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3
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Using an LDR and PNP transistor to automatically dim 12 V common anode 7-segment displays
I have designed and built a GPS time derived six digit digital clock using an Arduino. the digits are LED 2.3 inch common anode 12 V devices (because that's what I had!) and, after much work to drive ...
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4
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Dimmer for 2 halogen headlights [closed]
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 ...
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Shared neutral betwen 120v AC line and 82v ac output of triac phase dimmer?
I'm building a power supply for an old photographic enlarger (LPL/Saunders 4500ii aka 7451).
The enlarger has a jones connector with four pins for ground, a fan (120v ac), and a 200W bulb (82v ac RMS),...
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Dimmer with 2x MOSFET + isolation
I'm working on a test schematics for LED dimmer with MOSFETs rather than TRIACs. Some part of the schematics (MOSFET part) is taken from various websites, but combination below was never seen as a one ...
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2
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58
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AC dimmer vs AC motor controller
I successfully made an LED dimmer, except it doesn't work when I connect an AC motor to it. Actually, what happens is the motor/fan just turns on on its own.
I was told that a snubber circuit is to be ...
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200
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AC dimmer / ESP32-Wroom32d
I am making Leading Edge AC dimmer with ESP32-Wroom32d. I have problem with esp timer intterupts.
So I want to create a delay after zero-crossing(z.c.) (7ms) and then turn on Ac Pump and leave it on ...
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84
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Controlling minimum voltage output with a DIAC/TRIAC dimmer circuit
I purchased a hot plate/magnetic stirrer from Amazon (Model SH-2, a very common cheap device from what I've found) and would like to alter the circuit so that the minimum temperature from it is lower ...
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2
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127
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How can I control the light intensity of a LED tube?
I want to implement a lighting system and control the light intensity of each LED lamp. I thought about using an LED light with some communication protocol, but it seems that it is very expensive so I ...
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2
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216
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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 ...
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76
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Filter choice and EMI concerns for 10 A dimmer
I need a power router to divert excess photovoltaic power into a water heater.
Context: Solar panels are connected to a grid-tied inverter. A smartmeter measures how much power the house draws, and ...
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Change LED dimmed signal to full power when turned on?
Here's the scenario...
EDIT: Everyone seems to so far be missing the part about ELIMINATING the dimming, first and foremost.
I have a 12v circuit that is powering an LED array. On some event, the ...
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93
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Modify TRIAC-based light dimmer for lower current
I have bought a commercial Solera-branded light dimmer, model ERP31LED, which is according to the manufacturer designed to dim lights at 230V between 3W and 250W.
When set to the minimum, the three 3W ...
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To control the crossfade between 2 identical PWM LED dimmer modules, can a single dual gang potentiometer replace the 2 separate rotary controls?
Can the individual dimmer (rotary) controls of 2 identical prefab PWM LED light dimmer units be removed and replaced with a single dual gang potentiometer to crossfade between them for the blending of ...
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298
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LED brightness control with a potentiometer [duplicate]
Can we use these potentiometers to control LED brightness? 150mA current at 12 volts, the LEDs are 5mm in series and parallel, keeping circuit simplicity and avoiding CC circuit. Did anyone use ...
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Electrical noise between dimmer circuit and halogen transformer output
I am currently building an ESP32-based dimmer control for halogen transformers.
The dimmer should be controlled by touching any part of the transformer output circuit. Thus, I somehow need to connect ...
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300
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Speed controlling of AC motor with dimmer
I have a fan which has asynchronous motor. It's features are that 230V AC, 50 Hz, 50W. I want to control it's speed using AC dimmer. I can control the brightness of light bulb with my dimmer circuit. ...
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Forcing multiple-quadrant TRIAC operation through gate ringing
I got the possibly hare-brained idea to cause a single TRIAC gate pulse to go positive and negative, and thus fire in (maybe not all four but) more quadrants:
ThecLTspice simulation seems to show ...
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Alternative to the transil diode in an AC converter
Can I omit the transil diode (1.5KE68A1) in this 220V to 110V converter, or is it essential? Is there is an alternative, such as a varistor or EPCOS switching spark gap?
Circuit source.
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Fl5150 in 3-wire application
I was curious to navigate through the datasheet of FL5150/FL5160 phase cut dimmer IC:
Datasheet
and for circuits that operate on 220v, there is only a 2-wire application in the datasheet, how can we ...
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3
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136
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What is the importance of R1 connected in this circuit?
What is the importance of R1 in this circuit? What would happen if I removed R1 and kept VR1?
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2
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158
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Trailing edge dimmer
After having a successful design with a leading edge dimmer, I want to design a trailing edge dimmer for 230 VAC LED bulb dimming.
However, I'm having design difficulties with the power supply for the ...
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91
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Does anyone knows if the FL5160 work with 220V? [closed]
I live in Brazil where we have 220V 60Hz.
The documentation for the dimmer controller FL5160 (https://www.onsemi.com/pdf/datasheet/fl5150-d.pdf) is mostly saying that it works with 110v for the north ...
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3
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478
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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 ...
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87
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How can I regulate 220 Vac fans with a microcontroller?
I need to control some 220 Vac fans. The fans are PAPST 4650N and I would like to control the speed using a simple MCU like an ATmega328P.
I'm not interested in fine speed control, I only need to have ...
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56
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Can my dimmer run 100 LEDs in series through a bridge rectifier? [closed]
I have some Varilight dimmer switches which can be set to trailing edge or leading edge mode, The dimmers are marked with a maximum power of 400W for incandescent or 120W for LEDs.
Now, I want to run ...
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Can I use a light bulb dimmer to control an AC axial fan? [closed]
I have multiple AC axial fan that I need to slow down. Model number is ACI4420HH from ebm-papst. https://www.ebmpapst.com/de/en/products/compact-fans/axial-compact-fans/p/ACI4420HH.html
They run on ...
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How to make a dimmer that doesn't depend on the load's resistance?
I have an angle grinder which has a maximum power of 950 W.
My country provides 220 V as voltage source.
It has only one speed, so I want to make a dimmer to control its speed.
I used this circuit but ...
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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 ...
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Timer fade LED lamp [duplicate]
I have installed a 50 W LED lamp next to my bed and plugged it into a timer, so it works as a light supplement to my alarmclock. I love the intensity of the light, but I would like to have it fade ...
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Dimmer that takes LED from 0 to 50 W over a defined time-period [closed]
I have installed a 50 W LED lamp next to my bed and plugged it into a timer, so it works as a light supplement to my alarmclock.
I love the intensity of the light, but I would like to have it fade ...
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4
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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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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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362
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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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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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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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267
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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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1
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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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99
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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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621
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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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