hello, newbie, but i can take it.

[Burnt circuitry]

Hi all. done a search, couldn't find any threads. So, using a 19-24 v power source, not having an L7812, how do i regulate those volts down to 12v for a 12v bluetooth module?

 

[abraxalito]

Try a 12V zener diode and a series resistor. How much current does the bluetooth module take?

 

[Burnt circuitry]

Blue tooth takes 12v. Amp takes up to 24.

 

[twocents]

Simple - use a dc dc step down buck converter like this one:
https://www.amazon.com/MCIGICM-step...dc+to+dc+buck+converter&qid=1617627978&sr=8-8
But I think this question is best answered in the power supply forum.

 

[tomchr]

Why not use an LM7812? That seems like the simplest solution. If you'd rather start with a finished board, you can find a metric s*-ton of regulator boards on eBay. Boards based on the LM2596 seem common and cheaper than dirt.

Tom