Decent 24 volt Pic power supply

[sayzer]

If the case is high input voltage, then just use one 7818 or 7815 to drive 7805.

7818 or 7815 allows higher input voltage and in your case can make even better protection for 7805.


--------------------------------

[Acetronics2]

May be here ????

http://www.dimensionengineering.com/DE-SWADJ.htm

or here :

http://www.dimensionengineering.com/DE-SW0XX.htm

Alain

[rwskinner]

Thanks for all the comments and suggestions. I surely could run the two linears back to back like that and get away with it. Overall, a good simple switcher would still be the best bet as far as heat and effeciency. I break down and build some protos when I get time and come up with one for my library.

Again, Thanks to all and have a Merry Christmas.

[Ron Marcus]

I had a client project that ran on 24 volts AC and needed a good 12 volt supply for a camera, then 5 for a PIC. I used a switching regulator from National with a minimum number of parts to drop to 12 VDC. As I recall, the regulator didn't even get warm to the touch with 400 mA of current draw!