[Coco] Adding a CoCo 2 Case Fan

[Mike Pepe]

Chad H wrote:
> Well I already have a small bare board that turns 120VAC to 12VDC, so was
> going to mount that inside :)
> 

The power supply already does that. No need to add another power supply 
to just run a fan.

I usually grab 12v from the anode side of one of the fat diodes. Ground 
is pretty easy to come by. Usually I just solder to the bare tin near 
one of the copper keyboard supports.

This voltage is unregulated, so as a great side effect, you get audio 
feedback as to how busy your CoCo is.