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Using 6.3 v winding for relays power supply

Aha, I see but you are wrong stoner. It is about 3 relays and 4 LEDs and if the 7806 wouldn't be needed OP would not use it. He just needs 1 part to have it working as it should. A regulator is not meant to not regulate.

He now has used a circuit with almost the same outcome: also not working OK. Needs more parts to make that one work OK.
 
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He has a 7806 and not a bunch of dropping resistors to trial and error (or calculate) it seems...

LEDs can run from AC as can AC relays. No 7806 or DC needed at all. That's not the point though, is it?

What it seems he's done is make a Delon from 6V to make ~16V unloaded but the caps are too small to sustain that voltage under load.

Under loading it seems the Delon sags to 10V but that's still more than enough headroom for the 7806 so it works.
 
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What is the point of bringing a new subject up? Anyhow modern LEDs are quite reluctant to AC. Therefor we use a diode in series and a resistor when feeding it AC. Add a small cap to that to avoid flickering of the LED. Some LEDs die when fed a reverse voltage of 4V. For 4 LEDs that means way more parts than using an 7806 the proper way. Also the voltage doubler circuit does NOT work OK as it puts out 10V at the output of the 7812 so that one does NOT regulate. What is the point of doing stuff exactly as it is not meant by design?

I see we are in trial and error and "just doing something" reverse logic area so I am out of here. Ciao!
 
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I'm pretty sure he's using a 7806. That schematic is a copy of one I made in another thread. I'm sure you read the thread and the link I posted RE Delon doubler (post 3 I think).

If I'm right, that's why it's working.

Also, I'm not sure where you get your LED's but the 5 cent ones I use don't care if they run from 120VAC if you use a large enough dropper, and reducing flicker isn't necessary otherwise they would use a DC/cap system on LED Christmas lights.
 
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Everything is working so far with 10V on the 12V relays and a 12V regulator?!? I am glad I can't follow the logic. What you created with the fully redundant doubler is a higher voltage with still too much ripple voltage as the caps are still too small 😉 Instead of being closer to a solution you are further away from it as the regulator does not regulate anymore.

Is it so hard to understand simple electronics? After rectifying a pulsating DC voltage is available that must be smoothened with a filter cap. The filter cap value determines the ripple voltage. Or is this the in this section famous "just doing something" doctrine?

I just mean that my 3 relays can be managed. I'm not satisfied with 10 volts, but i can check the preamp and go forward. I order bigger caps tonight and i'll redo the board before adding the led's.
And no, it's not difficult to understand the basics of filtering AC, but i can't spit a 2200 µF so easiy and i don't want to put 5 or 6 470 µF in //, it's ugly and i don't have them.

Is it so hard to understand?
 
I'm pretty sure he's using a 7806. That schematic is a copy of one I made in another thread. I'm sure you read the thread and the link I posted RE Delon doubler (post 3 I think).

If I'm right, that's why it's working.

Also, I'm not sure where you get your LED's but the 5 cent ones I use don't care if they run from 120VAC if you use a large enough dropper, and reducing flicker isn't necessary otherwise they would use a DC/cap system on LED Christmas lights.

Yes it's your schematic, and i used a 7812 for this one...
 
I stand corrected. I thought you were getting 10V into a 7806. My mistake. JP is right, you could remove the regulator and gain some voltage - it isn't regulating anything.

You could just drop in the 7806 to use your 6V stuff if you like.
 
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