[BBC-Micro] BBC PSU
afra at aurigae.demon.co.uk
Tue Nov 18 22:01:07 GMT 2008
I have a couple of spare Beeb boards that I don't have cases or PSUs
for, which I'd like to try running up. I have a 5V psu that I could
power them off, however the Beeb PSU supplies both +5V and -5V to the
main board. Looking at the circuit diagram it looks like it's only the
cassette input amps that use the -5V.
So would it be possible to run a Beeb board off 5V only as long as you
didn't want to use the cassete ? Alternatly I wonder if you could
generate the -5V with a little oscilator / rectifier circuit, in the
same way as the Sinclair Spectrum did ?
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !
"You can twist perceptions, but reality won't budge" -- Rush.
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