On Sun, 21 Sep 2003, Tony Duell wrote:
> >From the part number of the regulator I'd assume it was a 5V output part
> (that would make snese -- a lot of electronics runs at 5V). In which case
> the input voltage to the regulator is going to be a bit more than that --
> say 7-9V.
Ok.
> Of course you also need to determine if the thing wants AC or DC (is
> there a bridge rectifier connected to the input socket), and if it's DC,
> the polarity (Does one of the input socket pins go to the 0V rail, if so,
> it's the -ve one).
It's hard to tell. There's a diode from the center conductor to pin 1 of
the regulator. The outer conductor (don't know the proper name) connects
through another (much smaller, surface-mount type) diode, that then goes
off to pin 4 of the regulator. Pin 2 of the regulator connects to some
(again, very small) surface mount transistors.
I can make a JPEG available if that would help.
--
Sellam Ismail Vintage Computer Festival
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Received on Sun Sep 21 2003 - 10:27:00 BST