All Questions
Tagged with ac-dc voltage-regulator
16
questions
3
votes
3
answers
2k
views
How to power two ESP-01S chips from 220 V AC [closed]
I would like to supply power for two ESP-01S microcontroller chips. I am a beginner with such kind of circuits. There are some constraints:
The only available power source is 220 V AC, so I need an ...
- 748
0
votes
2
answers
182
views
AC-to-DC Conversion: Which topology is better?
I am putting together a circuit board that is supposed to do its own power regulation. I need to convert 120VAC to ~5VDC. Due to the very limited real estate on the PCB, I would rather not use ...
- 101
2
votes
0
answers
123
views
What would be the cause of measuring AC voltage across a LM7805?
This is my first time here so I apologize if I don't provide enough information. I am trying to repair a centrifuge that is giving an error on its LCD display. Though the service manual doesn't say ...
- 21
0
votes
3
answers
232
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Powering small DC load ( 1W ) using 220V AC supply
I am trying to design a small control circuit for controlling large currents (not too large, around 200W, AC 50Hz). I have kept in the AC circuit isolated from the DC control circuit. But the problem ...
0
votes
1
answer
98
views
AC to DC conversion: is this an appropriate implementation?
I understand that a 20v AC converter supplies 20V RMS AC. I wish to convert this to 20v DC and so have drawn up a schematic for this which includes: the AC to DC conversion, regulation, smoothing, and ...
- 7
0
votes
2
answers
188
views
3.3v Powersupply
I have been needing a 3.3 volt power supply that can use at least 12-24 volts ac dc in. I have looked online and managed to make this schematic
but I have no idea if it works.
I was hoping if you ...
0
votes
0
answers
54
views
SMPS topology for combination of current controlled rail and fixed voltage rail
I'm looking at designing a LED driving power supply that can interface with a universal AC main input (~90VAC-260VAC) and produce 2 rails at the output; one a current controlled rail, and the other a ...
- 151
0
votes
1
answer
113
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About Ac to DC convertor..? [closed]
Which is the best way to convert Ac to DC , with maximum efficiency possible by using a transformer.
The required voltage is 5v and current is 1a .
I saw a circuit from my mobile phone charger they ...
0
votes
1
answer
76
views
Back Up Battery System Design
So I’m trying to design an AC/DC convertor for a test unit that will go inside of an environmental chamber, but I’m also trying to build in a battery backup charger and switcher circuit, in the event ...
- 1
2
votes
2
answers
1k
views
What is deciding the current of an AC to DC circuit
I'm a beginner, trying to build a power supply based on the sketch below to convert 230V AC to 5V DC. My final aim is to supply precision voltage for Arduino, which I think is 5V 700mA.
Here is the ...
- 669
3
votes
1
answer
216
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How to get from 3 phase variable high voltage AC to 230V AC
I already asked all the electricians in my area (at least 7-8) and nobody could help me, so I am asking you.
I have a Pelton generator - a type of water powered generator.
My output is 3 phase ...
0
votes
1
answer
338
views
Regulate, convert to DC and store current from home made AC generator to charge laptop
I am working on a small experimental project, learning more and more about electricity and electronics.
So, I have found this broken mixer and, surprisingly, it has a 300W engine with magnets that ...
- 145
1
vote
3
answers
785
views
Understanding a variable 220v AC to DC Power Supply
Can someone just please explain how and why the diodes D3 D2 and D4 are used?
Why D3 is single while D2 and D4 are in series?
How do we calculate the capacitance of capacitor required in a circuit ...
0
votes
3
answers
524
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How to get rid of voltage drop of this timer circuit?
I'm getting ~ 12VAC pretty stable without load with this circuit
However when I try to convert this signal into 6VDC up to 500mA or 1A with AC to DC conversion and a regulator;
I get huge voltage ...
- 117
-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 ...
