Linked Questions
10 questions linked to/from 230V AC to 5V DC converter, lossless
0
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4
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Is this transformer-less power supply a good idea? [duplicate]
This is based on a design I found somewhere , I just wanted to know whether this is a good idea ,I intend to use this to power a microcontroller and a 70 ohm 5 V relay . The cap c1 limits the current ...
- 382
7
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2
answers
24k
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Converting universal AC to 3.3v DC @ 0.1A
There's a bunch of topics around this but i haven't found something that fits my requirements. I'd imagine this is a fairly common thing though so any pointers would be appreciated
Basically i want ...
- 483
0
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2
answers
3k
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How exactly should I build a smart wall light switch for a smart home
I'm planning to build a smart home system and as you know smart wall light switches are a important part of it. I've been digging around for almost two weeks but still couldn't find what I'm looking ...
- 15
0
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2
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780
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Does AC voltage charge capacitors?
I was testing an old power supply(didn't work!) which have EMI filter caps on the inputs, when I disconnected the power source (220v AC), I touched the plug metal parts and I got an electric shock.so,...
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3
votes
2
answers
1k
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Wide input voltage range buck converter/circuit to 3.3V 150mA
I am building an appliance that should work in very wide range input voltage:
In some scenarios input is 5VAC, in other scenarios it can be 250VAC.
It's not a problem to convert AC to DC, then ...
- 335
-2
votes
1
answer
3k
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AC-DC 5V 700mA 3.5W Power Supply Buck Converter Step Down Module [closed]
I am trying to implement 220V AC-DC 5V converter on my custom PCB. Anyone can refer me to the circuit schematic that is being used in the referred link below. I am expecting the converter to have main ...
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votes
1
answer
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Wi-Fi controlled light; 230VAC - 12VDC/3.3VDC
I try to connect an ESP8266-12 and a 12V RGB LED strip to 230V AC. Based on this link, I've came to the following scheme. This will also be the first time I will etch a PCB myself.
The partlist will ...
- 111
1
vote
1
answer
457
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'Dielectric Strength' parameter meaning for cheap inductior coils
Initially I need an inductor to be used in cheap low-power AC-DC power supply. I'd like to use LNK304 solution:
When I reached 1mH coil I found Bourns 77F coils: very cheap (only 8 cents at some ...
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1
vote
2
answers
334
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A 1.44 W Universal Input Buck Converter
In the following post 230V AC to 5V DC converter, lossless , the 1.44 W Universal Input Buck Converter was mentioned.
In the LNK304 datasheet (applications section) , http://www.mouser.com/ds/2/328/...
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2
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AC to DC low power Converter
I am looking for low power power supply without transformer.
Input \$110V-230V\$,
Output plan to use 7805 regulator IC.
Application demand \$5V/3.V, 150-250mA. \$
In input side I ...
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