AC power

TG

Any suggestions for AC to DC convertor to power a STAMP project. The smaller the better. This is something I will want to mount on the board, ie internal not external

Thanks in advance

Post Edited (TG) : 3/12/2006 7:20:30 PM GMT

Robert Kubichek

TG said...
Any suggestions for AC to DC convertor to power a STAMP project. The smaller the better. This is something I will want to mount on the board, ie internal not external

Thanks in advance

We would need more info.
Output(s), Voltage/Amperage requirements????
Physical size restraint???

Bob N9LVU

TG

Besides the Stamp, I will be powering the Memsic g-meter and a LCD.

I am wanting this to be under 1''x1''x0.500''
Thank you

allanlane5

The problem with this approach is that you wind up with 115 volts AC on your board, which can be dangerous. The nice thing about the 'wall-wart' adapter approach normally used by Parallax is that it keeps the high-voltage AC away from you and your project board.

The typical solution to this is a transformer driving a full-wave rectifier driving a 7805 linear regulator, with a few capacitors added. Another solution is a small switching power-supply.

If you're going to connect it to AC anyway, there's going to be a cord, anyway, so you might as well use a 'wall-wart' supply to provide 7.5 to 12 volts DC, and use an on-board linear regulator (about 1/2" x 1") to regulate down to +5 volts. And Parallax sells very nice, reasonably priced ($8 or so) wall-wart supplies.

Mike Green

RadioShack sells very nice, small, switching wall-warts for 6V and 9V. The 6V one is rated at 1800ma and measures 1.25 x 1.75 x 1.00 inches exclusive of the prongs and strain relief. You can barely get a plug that is that small.