Protection circuit power source choices?

semi932 · 23rd July 2011, 07:46 PM

Running 3886 amp with nice low dc offsets.

I've been experimenting with other diy amp types so I ordered a protection relay kit off of you know where.

Nice kit for cheap money. Needs 12vac supply.
I'm going to use a wall wart for power.

Just wondering if there are any suggestions for other ways to get the 12v AC.?
It uses a 7812 regulator for dc so I guess I could make a 12v dc circuit and bypass the diode bridge and everything will turn on and off at the same time.

I may have answered my own questions.

Rembrant · 24th July 2011, 03:40 AM

Yea, you pretty much nailed it. However, its not impossible to get 12vAC wall warts. Look in a Radioshack. Either way, it will be basically the same thing. You will just be using the rectifier in the wallwart and not the one on board.

semi932 · 24th July 2011, 04:34 AM

Yeah.

I've got a couple of 12v AC wall transformers so that's probably the simplest and maybe best way to go.

Thanks

Minion · 24th July 2011, 06:48 PM

Why not use a 12v Regulator and the +V of your chip amp power supply , or use a 24v Relay and use the +V of the chipamp PSU ??

23rd July 2011, 07:46 PM	#1
semi932 diyAudio Member Join Date: Nov 2009	Protection circuit power source choices? Running 3886 amp with nice low dc offsets. I've been experimenting with other diy amp types so I ordered a protection relay kit off of you know where. Nice kit for cheap money. Needs 12vac supply. I'm going to use a wall wart for power. Just wondering if there are any suggestions for other ways to get the 12v AC.? It uses a 7812 regulator for dc so I guess I could make a 12v dc circuit and bypass the diode bridge and everything will turn on and off at the same time. I may have answered my own questions.

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24th July 2011, 03:40 AM	#2
Rembrant diyAudio Member Join Date: Mar 2007	Yea, you pretty much nailed it. However, its not impossible to get 12vAC wall warts. Look in a Radioshack. Either way, it will be basically the same thing. You will just be using the rectifier in the wallwart and not the one on board.

24th July 2011, 04:34 AM	#3
semi932 diyAudio Member Join Date: Nov 2009	Yeah. I've got a couple of 12v AC wall transformers so that's probably the simplest and maybe best way to go. Thanks

24th July 2011, 06:48 PM	#4
Minion diyAudio Member Join Date: May 2006	Why not use a 12v Regulator and the +V of your chip amp power supply , or use a 24v Relay and use the +V of the chipamp PSU ??

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