Re: Apple //c power pinouts

[dempson@actrix.gen.nz (David Empson)]

In article <buckley.767123969@shazam.cs.iastate.edu>,
David Buckley <buckley@cs.iastate.edu> wrote:
> I've got a //c without a external `power brick'.  The connector
> for the external transformer is a 7 pin DIN, and only three of
> the pins seem to connect to the power circuitry on the motherboard.
> The label on the bottom claims that it requires 15Vdc @1.2amps;
> I'm guessing that the three pins are -7.5, ground, and +7.5.

Nope.  The seven pins are as follows:

1 and 7 are not connected.
2 and 3 are signal ground
4 is shield (chassis) ground
5 and 6 are +15VDC

The pins are numbered clockwise, starting to the right of the notch.

The internal power converter can accept any voltage from 9V to 20V,
but I wouldn't recommend going below 12V.  You will need to supply
more current at lower voltages, and less at higher voltages.  It is
possible to run a IIc from a car battery (e.g. via the cigarette
lighter socket).
-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand