All Questions
Tagged with capacitive led
6 questions
1
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3
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Purpose of electronic elements in a capacitive dropper circuit
I have found a capacitive dropper circuit in an LED light bulb:
I have a few questions about this circuit:
Normally, in capacitive dropper circuits, I would expect a resistor parallel to C1. I am ...
- 11
0
votes
2
answers
103
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LED on lamp outlet flashes when switch is off - is this capacitive coupling charging the power supply? And what to do about it? [closed]
I wanted to connect an LED light chain to a lamp outlet in my house in order to turn it on and off using the wall light switch. I have dismantled the 230V to 3V power supply that was built into the ...
0
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0
answers
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Variac and Other dropper in line
I have a beautiful old variac, with a sliding (rotating) center contact.
I would love to use this on a nice LED string inside a glass bulb on top of the device.
But also, use the variac as the dimmer, ...
- 140
2
votes
2
answers
1k
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Capacitive touch directly above LEDs
I'm trying to make a design where the user can run his/her finger directly over a series of 10 LEDs (covered with 1 mm glass), and the LEDs should glow on/off based on the finger's position.
I wish ...
- 4,972
0
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How can I make a POWER-LED Lamp?
What is the best way to light 10 POWER-LEDs with AC mains (220V)?
(I want to make an LED lamp.)
Here is more info:
I have 10 of these POWER-LEDs:
Product Chip: 40x40 mil
Chip Brand: EVERLIGHT-...
- 818
3
votes
2
answers
3k
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Designing a Transformerless power supply
I am working on a transformerless PSU for maiking a 3nos.x3 watt led, each having forward voltage around 3.6v and current around 650-700ma.
I have worked on this kind of circuit:
I guess a 1uf ...
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