Robert_Kidd

modified 6 years ago

Mains to 12V DC Adaptor

247

04:59:12

DANGEROUS - DO NOT BUILD UNLESS YOU ARE EXPERIENCED WITH MAINS POWERED CIRCUITS.
This is a low current 12V output DC supply. 2.2uF capacitor must be at least 400 VAC rating. 470k = 1W
100R = 2W
470uF = 2W
Diodes = 1N4007 or similar

published 6 years ago

lenzrulz

6 years ago

Love it, very stable DC delivery...👍

giomix

6 years ago

[BLOCKED]

giomix

6 years ago

[BLOCKED]

lenzrulz

6 years ago

crake

6 years ago

What's the zener part number? I don't see it listed

Robert_Kidd

6 years ago

A 1N5349 would do. It is a 5W but a 2W zener would be adequate.

giomix

6 years ago

@crake could be 1N4742 zener

Robert_Kidd

6 years ago

Thanks for pointing out the omission @crake. I had intended to detail it and forgot.

Robert_Kidd

6 years ago

1N4742 is only 1W.

Robert_Kidd

6 years ago

And Correction: 470uF is 25V working voltage (not 2W).

kiani

6 years ago

[BLOCKED]

kiani

6 years ago

[BLOCKED]

kiani

6 years ago

[BLOCKED]

lenzrulz

6 years ago

Your idiotic “Taser gun with 555” is extremely hazardous producing voltages of 1.36Gv. You have an unenviable history of propagating extremely unsafe “fire” circuits my ignorant friend and yet you have the audacity to post stupidity on this circuit?

crake

6 years ago

All of you, enough of this! Kith and make up.

rich11292000

6 years ago

Needs only 1 ground, 2 grounds makes a bypass

Robert_Kidd

6 years ago

@rich11292000, correct. I should have removed it which I now have. Was hurrying :-)

hurz

6 years ago

No problem @robbi_kiddi, having a second ground to short half the circuit is a typical noob mistake, dont worry. For you to think about, what happen if the zener gets damaged and an open circuit?

kiani

6 years ago

[BLOCKED]

Robert_Kidd

6 years ago

@hurz, thanks for your constructive comment.

kiani

6 years ago

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kiani

6 years ago

[BLOCKED]

lenzrulz

6 years ago

More idiocy...😡

kiani

6 years ago

[BLOCKED]

Robert_Kidd

6 years ago

Kiani, you choose to demonstrate here again what a pathetic joke you are. Perhaps you should learn to keep quiet. Everyone else, thanks for your useful comments.

lenzrulz

6 years ago

Well said Robert...👍🏻

giomix

6 years ago

Well said Kiani 👍

kiani

6 years ago

[BLOCKED]

Robert_Kidd

6 years ago

Can’t stop yourself, can you? 😂

kiani

6 years ago

[BLOCKED]

kiani

6 years ago

[BLOCKED]

lenzrulz

6 years ago

More idiocy...😡

Robert_Kidd

6 years ago

Can’t stop yourself Kiani, can you? 😂

kiani

6 years ago

[BLOCKED]

Robert_Kidd

6 years ago

Can’t stop yourself Kiani, can you?

kiani

6 years ago

[BLOCKED]

giomix

6 years ago

[BLOCKED]

Robert_Kidd

6 years ago

If anything is possible then stop. Now.

kiani

6 years ago

Does that mean you ve stopped lenny!?

Robert_Kidd

6 years ago

Stopped him doing what?

giomix

6 years ago

To blackmail community for example if someone criticize it

giomix

6 years ago

To publish only circuit having flashing leds 😁

giomix

6 years ago

To answer to all the other comments LOL, my friend, more idiocy, and last but not least, dot.

Robert_Kidd

6 years ago

Kiani?

giomix

6 years ago

To refuse to learn somwthing

giomix

6 years ago

To pretending himself as an expert

giomix

6 years ago

Other?

Robert_Kidd

6 years ago

Kiani?

giomix

6 years ago

[BLOCKED]

Robert_Kidd

6 years ago

Kiani?

hurz

6 years ago

[BLOCKED]

kiani

6 years ago

[BLOCKED]

kiani

6 years ago

[BLOCKED]

kiani

6 years ago

🎈 condoms.

kiani

6 years ago

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kiani

6 years ago

[BLOCKED]

kiani

6 years ago

http://everycircuit.com/circuit/6452093293166592

kiani

6 years ago

[BLOCKED]

kiani

6 years ago

[BLOCKED]

lenzrulz

6 years ago

More idiocy...😡

faceblast

6 years ago

it'd work with a step down transformer on the front end with an output of ~30V p-p. cap series mains supplies are never a good idea; the input capacitor works too hard, and when they fail they punch through, putting the surge through the load. this circuit is nice in theory but very dangerous.

kiani

6 years ago

[BLOCKED]

Robert_Kidd

6 years ago

@faceblast, thanks for your useful input. Of course if I used a transformer it wouldn’t be transformer-less. Occasionally I publish a circuit that has been published in a reputable electronic book or magazine - this is such a circuit. Whilst @hurz asked a relevant question about the Zener going short circuit and you have raised concerns that should be considered, Kiani has again chosen to exercise his right to show his utmost stupidity.