RE: Lunar Lander

The other thing is that you should be able to apply the +/- 22V DC to
the 36V AC inputs. Look at the schematics and follow the diodes-- all
they really want it something above +/-15 for the regulators in the DVG.
So, you feed in the +/- 22V DC, it only forward biases one of the diodes
in each half of the rectifier, but you still have about +/- 21V or so
going into the regulators-- should be enough to still get a clear +/-
15V. I did this to run an Asteroids board off a Star Wars power supply
for a while...

You can also use +/- 12V, but your picture won't scale full-screen on a
mono monitor. (Plenty good for testing on a scope though.)

-Clay

> ----------
> From: Ray Ghanbari[SMTP:ray@Agouron.COM]
> Reply To: vectorlist@mcfeeley.cc.utexas.edu
> Sent: Tuesday, March 02, 1999 1:14 PM
> To: vectorlist@mcfeeley.cc.utexas.edu
> Subject: Re: Lunar Lander
>
> mike_ranger@DOFASCO.CA wrote:
> >
> > Thanks Al...
> >
> > I looked, did not see a link, but forgot to FTP in to take a
> look.
> > Nice quality as usual, gotto return the favor one of these
> days!
>
>
> Mike, you don't need 36VAC to test this on a bench. You need 5V and
> +-12V (can't remember if you need -5V) Just find the appropriate test
> points on the PCB on the other side of the voltage regulators.
>
> Cool game and fairly rare. The PCB is definitely worth saving...
>
> Ray
>
>
Received on Tue Mar 2 17:34:21 1999