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Questions tagged [dimmer]

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58 views

Light dimmer with capacitor [on hold]

I have a capacitor in series after a light dimmer. How could I calculate the voltage and current through the capacitor? simulate this circuit – Schematic created using CircuitLab
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1answer
22 views

Current flow in trailing edge dimmer

I was trying to learn something about dimmers for light bulbs. After some reading, I found that most trailing edge dimmers contain some variant of this: Found for example in this diy-project or this ...
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0answers
30 views

Connecting PWM-Dimmers to drive LED-Strip

I've got a question about how to connect multiple PWM-Dimmer to drive a RGB-LED Strip. I bought three of these Ebay-Article No. 272304972812 and connected them as shown below. Without any schematic ...
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2answers
131 views

how to convert a PWM AC dimmer circuit from normally-closed to a normally-open one?

Hi, As you see in schematic, the circuit is a normally-closed AC dimmer. Therefore when the connection between microcontroller - which produce pwm - and mosfet get halted, the lamp will be always on ...
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1answer
221 views

Modify 120v lamp dimmer for LED bulb

I have a "stick lamp" that has a pot/twistable dimmer with photocell. It works fine with a 24w Sylvania CFL bulb but won't light this 22w dimmable LED bulb (http://www.ikea.com/us/en/catalog/products/...
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7answers
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 ...
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2answers
4k views

Can I run audio signals through a dimmer switch to control volume?

I have long had a off/on light switch in my living room controlling whether the speakers in that room are on or off. More recently, I've wanted the music in the living room to be slightly softer than ...
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1answer
203 views

amplifier for 10V LED dimmer control using Raspberry Pi

My problem is I need to have an amplifier circuit design - schematic + components BOM with specific model information that is able to provide a dimmable output signal (Vout) 0.2-10V <0.8A for a set ...
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1answer
355 views

Looking for advice how to correctly configure PWM dimming with Mean Well LDH-45A-1050 device

I am looking to use a Mean Well LDH-45A-1050 DC/DC LED driver with a an LED matrix but crucially to use PWM dimming. Already have perfectly working led with this driver, just looking now to figure ...
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1answer
94 views

Flickering 230VAC Halogen dimmer

After using Stackexchange for several years now for solving all my Python, LaTeX, math, electronics, engineering and life questions, I have finally come up with a problem I cannot find an answer to. I ...
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3answers
79 views

uC controlled MOSFET based LED Dimmer stops responding

I've designed and implemented LED Dimmer driven by PWM from Adruino Pro Micro (CLONE) with software based on MySensors library. See the schematic attached below. The idea is really simple: uC is ...
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0answers
27 views

Halogen 24V/150W light dimmer design

I have 64640 HLX (24V/150W) halogen lamp with 24VAC/300W power source and I want to design a dimmer to control the halgen light. I have two solution in my mind: 1- DC solution : using PWM and power ...
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2answers
3k views

What does a reverse phase dimmer circuit look like?

I'm familiar with simple forward phase dimming using a triac. The circuit is stupid easy with only a handful of components. Of course this simple example can be improved upon to make it safer or ...
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1answer
112 views

Solid State relay trips when load on Input change

I am trying to control a 12V door lock using this solid state relay. In my switchboard, I picked the power from the common power line to power up my SSR at 5V using an adapter, The power line is also ...
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0answers
52 views

LED Dimmer current source and current sink detection

I'm trying to design an input circuit for a microcontroller that will work with 1-10 V dimmers. There appear to be two standards for dimmers, current source and current sink, and I'm trying to work ...
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1answer
109 views

regular wall switch on off led dimmer

Is it possible to make a simple dimmer thats operated just with the flick of the regular wall switch on and off? just like what Philips sceneswitch bulb does? My requirement is 100%, 50% and 10% ...
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1answer
137 views

Triac dimmer makes audible noise (hum or buzz)

I have some triac dimmer from IKEA (bought several years ago). This dimmer makes audible noise (hum or buzz), very notable during night when it is placed on a bedside table. I failed to find the ...
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1answer
27 views

I want to handle the voltage and current spikes from inductive load of 220V AC ceiling fan

I am trying to regulate speed of 220V ceiling fan from Arduino but unable to handle the reverse voltage and current though I am applying the flyback diode across inductive load.
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3answers
145 views

1000 W Arduino dimmer

[![enter image description here][2]][2]everybody, I have a project which is to dim 1000 W halogen light connected to Arduino. I used this circuit which is working fine with 100 W halogen light but ...
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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 ...
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1answer
54 views

Triac control circuit through load

Why is it that in every triac analog dimming circuit I find that the triac triggering circuit is fed through the load and not straight from the mains??
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4answers
52 views

Phase control universal motor dimmer

I need to control the speed of a 220v universal motor using arduino and I am thinking to use an atteny85 ic with a phase control circuit (ltv814 to detect zero crosses and moc3052 to drive a triac to ...
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1answer
71 views

How much battery power for LED and how to make it flicker [closed]

I am trying to figure out what configuration of battery(ies) I need to power this LED. I am only using one (specifically the warm white 1-up). I am also looking to make it flicker like a candle with ...
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1answer
51 views

Tripping a circuit breaker when using a half wave rectifier

How does a half wave rectifier or phase control dimmer affect the triggering of a circuit breaker? For example, if a 20A resistive load was on a 15A breaker with a half wave rectifier. Now average RMS ...
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1answer
584 views

Arduino AC dimmer, with Wall switch control

I'm building an AC dimmer with arduino, but I also want to have the ability to control the lamp from the wall switch (just on/off, with no dimming). What is the best way to achieve this? Do I also ...
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2answers
79 views

Combining a light therapy LED lamp with a light alarm clock - programmable dimmer

I live in a place where there is little daylight in winter, so I would like to use a light therapy lamp. Also, I would like to use it to wake me up, gradually increasing the intensity of the light ...
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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 ...
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2answers
127 views

Dimmer switches and analogue voltmeters

I want to make a steampunk type table lamp. I want to use a dimmer switch and an old fashioned analogue AC voltmeter to display the "voltage" as a feature/gimmick. This displayed voltage doesn't need ...
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1answer
74 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 ...
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1answer
40 views

Create a polar cap with a diode?

I'm trying to order components, so I can make a board following this circuit. My problem is, I cannot find any 0.1uf capacitors, that are rated at 275VAC. The highest voltage I can find, in stock, is ...
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1answer
197 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 ...
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2answers
216 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, ...
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1answer
52 views

True replacement for MOSFET Infineon SPD04N50C3

I have built many 240V AC dimmers with back-to-back Infineon SPD04N50C3 N-channel MOSFET transistors without any problems. Unfortunately they are not manufactured anymore. I found a replacement from ...
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4answers
481 views

How should I modify this back to back MOSFET AC mains circuit?

I have a WiFi enabled AC mains light dimmer/switch that uses a back to back MOSFET design. The device sits in series with the load (lightbulb) and therefore does not have its own return/neutral ...
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0answers
187 views

Light dimmer circuit using triac gives fluctuating dimming

Light dimming using triac and optocoupler is very common and basic circuit, I have successfully tested the dimming for 1 channel (1 triac, 1 opto-coupler) now I want to add one more light dimmer with ...
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2answers
391 views

How to dim my dc push button led switch that is too bright?

Attached is a screenshot of my button and the dimmer I found, it’s getting a 12V source. I figured using wiring the pwm dimmer like the one shown will work. Please let me know your suggestions on if ...
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1answer
81 views

How to: Led Dimmer switch to on/off switch

I have a led strip with a wonderful no touch dimmer on the bottom of the kitchen cabinets. What i would like to do is to "link" the inner lighting of the cabinets to the same switch, in a manner that ...
0
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2answers
102 views

TRIAC and Driver is heating up

I am trying to do a dimmer and below is my schematic. Before doing an actual PCB, I did a proto on a veroboard and the circuit works perfectly. Now when I did a PCB and got it back from the ...
1
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1answer
69 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 ...
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1answer
310 views

How to choose the right potentiometer for dimming a LED

I have a reading lamp from IKEA. It has a bright LED. Too bright for my taste. So I inspected it and it is composed of a DC power supply unit that outputs 7V and a maximum of 3W. The LED unit is ...
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3answers
383 views

Calculate Angle for Triac Phase Control

Triac-based phase control of the mains power into resistive load. According to this post, https://www.physicsforums.com/threads/how-to-calculate-rms-voltage-from-triac-phase-angle.572668/#post-...
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1answer
773 views

COB LED Dimming via Poentiometer?

I want to create a dimmer for high power LED light's i'm building for video work. I'm using CREE CXB3590 chips, which have run at 36V with a forward current of 3.6A. I am powering these through a 150W ...
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1answer
96 views

Can I use X9C102 digitally controlled potentiometer on AC voltage?

I am working on a project to make a dimmer using the triac and a photocoupler, and I want to know if I can use a digital potentiometer to regulate the intensity of the light. I know it works for ...
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2answers
29 views

LED dimmer/controller: preserve state after loss of power? [closed]

Summary: Are there LED Dimmers that are "always on" and whose settings survive loss of power? Details: I am considering a more or less standard led-strip set (consisting of power transformer/driver,...
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3answers
965 views

Can I use dimmer voltage regulator for single phase multi speed AC motor?

I have a swamp cooler motor which is single phase 3 speed motor, 1/7 HP i.e. 106 watts. I wish to reduce its speed (rpm) by 50%. Can I use this dimmer circuit to do so? This dimmer regulator is rated ...
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2answers
487 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 ...
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1answer
64 views

Decreasing the surge power of the AC loads

I have a pure sine wave inverter 12v to 220v AC, its continues output power is 600VA and the surge power is 1130VA, I want to running my 200W fridge, but unfortunately my fridge surge power is a bit ...
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1answer
114 views

Potentiometer is Heating [closed]

I have this light dimmer circuit, when I plug it into the AC, the dimmer works fine but I noticed that the heat in potentiometer is increasing, is there any workaround to fix this problem?
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1answer
36 views

LED Dimmable 2 of the 8 turn off when others are dim [closed]

So I just had Integrated LED Recessed Retrofit Ceiling Light Fixtures installed on a Lutron Toggler 150-watt Double Pole 3-way White Toggle Indoor Dimmer (rated for LED lights). When the dimmer is ...
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1answer
34 views

Convert a 100-277V dimmer to 1-10V [closed]

I'm trying to use the following dimmer: https://www.smarthome.com/switchlinc-dimmer-insteon-2477dh-remote-control-dimmer-dual-band-high-wattage-white.html with these lights https://www.eledlights....