Questions tagged [dimmer]
The dimmer tag has no usage guidance.
187
questions
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1answer
54 views
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, ...
0
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0answers
34 views
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/...
2
votes
1answer
38 views
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 ...
0
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0answers
65 views
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 (...
0
votes
1answer
50 views
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 ...
0
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0answers
50 views
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/...
1
vote
1answer
72 views
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 ...
1
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0answers
14 views
Lutron MACL-153 with Shelly 1
To sum up my question, can a digital dimmer switch be controlled with a ESP8266 WiFi switch? I don't fully understand how a digital dimmer works and I doubt that just switching the power through a ...
0
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1answer
40 views
Reverse Phase Dimmer MOSFETs
I have a comprehension question regarding the design of a reverse phase dimmer. I have a picture attached of the part of the circuit I do not understand:
The line is connected to the Drain of Q2 and ...
1
vote
4answers
104 views
Can I prevent a 9V LED flickering when dimmed to around 30%?
I bought an overly bright 9 volt, 3 watt LED to light up a bird box which has a webcam in it. The LED module is this one: https://www.amazon.co.uk/gp/product/B07CWSRF6N
However when I dim it using a ...
0
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3answers
154 views
Using very low voltage from dimmer switch to trigger 12 volt supply
I have a new stereo head unit in my car that auto dims when the headlights are on. The head unit does not have a variable dimmer, it is either on or off. I have a dimmer switch in my car that is ...
1
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0answers
74 views
Suppressing the turn off transient for a trailing edge 120V AC dimmer
I am designing an 120V 60 Hz AC trailing edge dimmer based on the reference design above. The gate is driven starting at 0/180 degrees of each cycle and turns off at a programmable phase later in the ...
1
vote
1answer
267 views
2-channel dimmer from NE555 + LM358?
I have a 12-24 V dimmer for LED strips like this:
https://www.circuitlab.com/editor/#?id=c8m48y
simulate this circuit – Schematic created using CircuitLab
I want to understand a couple of ...
0
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0answers
247 views
AC Dimmer circuit with MOC3021 & EL817 along with ESP8266 (NodeMCU)
Major two issues/question are here:
1) The challenge I am facing is, my interrupt is not working.
2) do I need to include a Heat Sink in this?
Hello, I am quite ...
0
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0answers
50 views
zero cross detection using linux GPIO in C
I am trying to make an AC dimmer and need zero cross detection using GPIO in C, I am using beagleboard. I have seen others using python on RPi so it should be doable but, it seems that GPIO reading ...
0
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0answers
27 views
Triac failure and Capacitive Transformerless Power Supply Load
I have done a dimmer using a PIC microcontroller (with a Transformless Power Supply), with BT137 (sensitive gate, four quadrants), firing on QII and QIII, and its load an old fashion Edison style 220V ...
0
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1answer
81 views
how to make a variable light dimmer circuit without potentiometer?
I was looking at the Wemo Dimmer and thought to make one at home myself because the price of it is very much if I buy(including import duty). I searched for the knowledge which helps me create a ...
0
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3answers
349 views
FL5150 (LED dimmer) circuit explanation
I have been working on an IC from Fairchild semiconductor named FL5150, whose electrical working I have tested by controlling the brightness of a lamp. Until now I have been using the circuit given in ...
0
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0answers
52 views
Firing Triac strategy for motor phase control
I try to design a replacement potter's wheel motor controller for an old potter wheel. I have solve some problem and I am able to control the phase standard of filament light.
Now I try my board on ...
0
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0answers
32 views
COB LED Can't figure maximum voltage
I need to know max voltage parameter of COB, it's video led light Aputure c120d(cob 130w, manufacturer "luminus", unknown model, 6000 Kelvins,CRI96+), i have working driver/dimmer with this light.
...
0
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1answer
42 views
Capacitor Shorting in transformer circuit
I built the circuit shown in the link with 240v
https://www.instructables.com/id/Variable-voltage-ignition-coil-power-supply/
It did not work (produceing no spark), as I believe my capacitor was ...
1
vote
1answer
60 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 ...
0
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0answers
37 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 ...
1
vote
3answers
109 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 ...
1
vote
1answer
54 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.
0
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3answers
253 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 ...
1
vote
1answer
361 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 ...
0
votes
1answer
77 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??
0
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4answers
116 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 ...
0
votes
1answer
92 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 ...
0
votes
1answer
58 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 ...
3
votes
1answer
181 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 ...
0
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1answer
47 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 ...
0
votes
1answer
321 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 ...
1
vote
2answers
521 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, ...
1
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1answer
59 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 ...
5
votes
1answer
264 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 ...
-1
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2answers
93 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 ...
0
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1answer
112 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
votes
2answers
173 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 ...
0
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1answer
1k 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 ...
0
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3answers
701 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-...
0
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1answer
113 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 ...
0
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2answers
43 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,...
3
votes
2answers
526 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 ...
1
vote
1answer
90 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 ...
0
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1answer
166 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?
-1
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1answer
39 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 ...
0
votes
2answers
276 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 ...
1
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1answer
83 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 ...
