The transformerless tag has no wiki summary.
3
votes
2answers
279 views
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 ...
0
votes
1answer
114 views
Transformerless inverter from 20*12V batteries
Is it possible to convert 240VDC from 20*12V batteries to 180VAC-240VAC pure Sine Wave?
i have an idea using H-Bridge mosfet drivers....But i have seen on web that 350Vdc is must to convert it to ...
2
votes
3answers
676 views
Power Supply Design
I just let the smoke out of my testing setup. I designed and built a simple power supply using this guide. I built a capacitive power supply with a bridge rectifier and a final 3.3VDC voltage ...
8
votes
1answer
462 views
Understanding CS5463's basic circuit power supply
I'm trying to put the CS5463 chip functional using the example circuitry on page 41 of the datasheet (attached bellow):
Right now, I'm working on the top part of the circuit, which is the IC power ...
5
votes
1answer
295 views
How to calculate the zero crossing offset in a capacitive transformerless power supply
I'm working on a circuit powered by a capacitive transformerless power supply, that is a microcontroller based triac-switching project for resistive loads.
I've taken the basic design of the power ...
6
votes
1answer
523 views
Requirement to display 3 mm LED by 220 V AC supply
I want to power a single 3 mm LED by a 220V AC source. For this I think I need one LED, one resistor and one capacitor. I don't know the needed resistor value and circuit diagram. The circuit also ...
7
votes
5answers
3k views
How efficient is a capacitive power supply?
Something like this
Falstad sim version of it
(I'm tired, I keep making mistakes, so please excuse me for the second time.)
Now these are not very safe PSU's, due to the lack of isolation. But in ...
