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Questions tagged [dimmer]

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P-channel MOSFET LED dimmer

I am building the dimmer circuit for the LED array. The circuit is based on P-channel MOSFET. The circuit works but I afraid that the MOSFET can be damaged when the potentiometer R1 is in its lowest ...
Anton Sheinin's user avatar
0 votes
2 answers
53 views

Do dimmers affect consumption?

I'm almost hesitant to ask this question because it just seems like I'm going to get lambasted with the obvious but I truly do not know the answer. This is a two prong (no pun intended) question. If I ...
Paul Sebesta's user avatar
0 votes
2 answers
36 views

Using 5-in-1 dimmable power supply with PWM dimmer for LED strip

I hope my question is not too basic. I'm confused as to how I am supposed to connect a PWM 24V dimmer with my 24V 5-in-1 dimmable power supply. The 5-in-1 has AC inputs (neutral and load), LED- and ...
Marc-André Lafortune's user avatar
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0 answers
118 views

Using a 24V dimmer with 12V

I have a Paulmann 70975 24V LED touch dimmer that I want to use with 12V LEDs. The input voltage is provided by a MeanWell LPV-60-12 12V 5A power supply. The consumer is a 12V 2835 white LED stripe of ...
redspider's user avatar
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0 answers
50 views

LED dimmer driver board

I am all very new to the electrical stuff and perhaps this is an advanced project but hopefully someone can at least point me in the right direction. I am looking to create a PCB that will allow me to ...
Maciej Olborski's user avatar
0 votes
1 answer
98 views

Optimizing Incandescent Traffic Light Design

I'm currently working on designing an incandescent traffic light system and could use some guidance on extending and optimizing my design. Initially, I've successfully implemented the required ...
Zipho Lunika's user avatar
1 vote
2 answers
89 views

Why is this light-dimming configuration flickering? Why is it not stable?

My question is why is this configuration showing an unstable flickering voltage accross the light bulb? Were incorrect capicitance values used? Observing the oscilloscope, I note that there is some ...
Zipho Lunika's user avatar
1 vote
1 answer
129 views

Fan dimmer using MOC3021 and TRIAC suddenly stopped working. Cannot find possible reason. The circuit worked fine for two days

I am trying to control speed of a fan using MOC3021, BT136 and zero crossing detector. The circuit worked fine for 2 days and then suddenly stopped working. I am unable to find the problem in the ...
Aditi Kumari's user avatar
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0 answers
30 views

Floating relay terminal in AC circuit causing simulation error

I'm trying to switch between two branches for my circuit. But as the relay switches, the other terminal is left floating. In an AC circuit, I cannot use a pull-down resistor. I also have a feeling ...
Zipho Lunika's user avatar
0 votes
1 answer
93 views

Dimmer + LED light bulb + resistor = Ohm's Law Broken

CIRCUIT: A 12 volt battery powers a dimmer. The output of the dimmer powers 4 LED light bulbs. They are all in parallel: 6W + 2W + 2W + 2W. The 6W bulb is a spotlight. The 2W light bulbs are under ...
rstross's user avatar
0 votes
2 answers
87 views

Add Motor Speed controller to floor heating mat? [closed]

EDIT: I've updated the question. Would it be safe to add an inline PWM motor speed controller as a dimmable controller? I'm having trouble finding a floor heating mat in my country domestically. I'...
mg13's user avatar
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1 vote
1 answer
230 views

How to bypass dimmer switch? [closed]

I bought this lamp from "Ferm Living" that comes with a built-in 3-level dimmer mode which I don't like. I rather would like to connect the lamp to a switched power socket and whenever the ...
Airlike1's user avatar
1 vote
0 answers
100 views

Triac dimming light is affected by other non dimmable load (relay)

When I am using one dimmable light turning on/off is working OK and dimmable is OK. But when I’m using other non-dimmable load turn on/off through relay, then dimmable light is on/off for the 1 s. Is ...
Jaimin's user avatar
  • 69
1 vote
1 answer
93 views

TRIAC driver circuit - MOC3021

I have created a TRIAC AC dimmer circuit using an MOC3021 and I am facing the problem that the output is always on. Please help me rectify the issue. Please see the image of the circuit and Zero PCB I ...
Rahul Goyal's user avatar
1 vote
0 answers
76 views

Custom 240V Infrared Heater Controller

I'm DIY'ing a controller for a few heaters I'm placing on my covered deck, components listed below. I'm using an Arduino Uno Wifi Rev2 to control on/off and a dimmer to adjust the heater output. A ...
saulpower's user avatar
  • 111
0 votes
1 answer
148 views

PWM from the Robodyn AC light dimmer

I am currently conducting a test on a Robodyn AC light dimmer product, and I want to check the PWM trigger output from the controller. Due to equipment limitations, I am only checking the trigger from ...
Angga Amalul Ahli's user avatar
1 vote
1 answer
69 views

Back-to-back MOSFET conduction problem for the negative cycle

I've been trying to design a DIY light dimmer circuit but I'm pulling my hair over this particular problem I'm facing. Is there any way to control conduction of both MOSFETs in both cycles of input? I ...
Salman's user avatar
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0 votes
0 answers
177 views

Controlling TRIAC with PWM from microcontroller

I am looking to control a mains heater with a microcontroller. It seems like most solutions use an optocoupler to signal the microcontroller at a zero crossing and another optocoupler to trigger the ...
Levi Applebaum's user avatar
0 votes
0 answers
51 views

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 ...
Angga Amalul Ahli's user avatar
0 votes
2 answers
118 views

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, ...
Ansel Zandegran's user avatar
0 votes
3 answers
72 views

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 ...
Eli Y's user avatar
  • 91
0 votes
3 answers
117 views

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 ...
Mark Borchers's user avatar
4 votes
4 answers
200 views

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 ...
Chris's user avatar
  • 41
0 votes
0 answers
61 views

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),...
Brians Spare Time's user avatar
0 votes
0 answers
79 views

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 ...
unalignedmemoryaccess's user avatar
0 votes
2 answers
222 views

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 ...
Popeye's user avatar
  • 339
0 votes
1 answer
420 views

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 ...
Matej Knific's user avatar
1 vote
1 answer
283 views

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 ...
LarryBud's user avatar
  • 511
1 vote
2 answers
640 views

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 ...
WalterPH's user avatar
  • 440
4 votes
2 answers
228 views

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 ...
pbandjazz's user avatar
  • 337
0 votes
1 answer
144 views

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 ...
bobflux's user avatar
  • 79.5k
0 votes
0 answers
55 views

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 ...
Konfucius's user avatar
0 votes
0 answers
175 views

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 ...
Marcos Del Sol's user avatar
0 votes
1 answer
81 views

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 ...
shigginpit's user avatar
2 votes
2 answers
737 views

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 ...
user avatar
0 votes
0 answers
73 views

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 ...
Ercksen's user avatar
  • 101
0 votes
1 answer
728 views

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. ...
Bowman's user avatar
  • 349
1 vote
1 answer
121 views

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 ...
rdtsc's user avatar
  • 16.3k
0 votes
1 answer
176 views

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.
maher471's user avatar
0 votes
1 answer
97 views

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 ...
Kamal Moussafir's user avatar
1 vote
3 answers
145 views

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?
Mahmoud Youssef's user avatar
2 votes
2 answers
427 views

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 ...
jancoow's user avatar
  • 51
0 votes
1 answer
134 views

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 ...
Felipe Perez's user avatar
4 votes
3 answers
821 views

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 ...
Guilherme Gaspar's user avatar
0 votes
1 answer
108 views

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 ...
VirtApp's user avatar
  • 579
1 vote
1 answer
78 views

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 ...
Peter 222's user avatar
0 votes
1 answer
145 views

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 ...
AQUAMAN's user avatar
  • 361
0 votes
0 answers
196 views

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 ...
Bassem Faris's user avatar
11 votes
4 answers
1k views

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 ...
A. Daty's user avatar
  • 113
-1 votes
0 answers
20 views

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 ...
Jacob's user avatar
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