30 Jun
2008
30 Jun
'08
12:56 p.m.
On Sun, Jun 29, 2008 at 6:27 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
What about a transformer with 2 separate 9V secondary windings (not hard
to find)? Use one for the 9V AC, the other to feed the 5V
rectifier/regulator circuit.
This seems like the best idea, to me. I'm not any kind of electronics
wizard, but a power supply circuit driven from a transformer with two
secondary windings is something I'd be comfortable designing.
Thank you very much for the tips, everyone.
-Seth
Sounds like you just need a single 9VAC power supply,
a bridge, a
voltage regulator, and perhaps some caps to clean up the signal a bit.
The trick is to provide enough wattage.
No.
The 9VAC has to be a separate transformer winding from the one that provi=
des=20
the +5VDC eventually, because of how it's used...