11 Nov
2005
11 Nov
'05
7:53 p.m.
>>>> "Douglas" == Douglas Taylor
<dj.taylor at starpower.net> writes:
Douglas> What I don't have is circuit schematics that tell me how to
Douglas> connect power to these parts and what voltages, and how to
Douglas> cable the electronics to the interferometer portion.
Douglas> Any tips on how to efficiently reconstruct circuit diagrams
Douglas> from inspection of the electronics? There are two cards,
Douglas> with standard TTL and analog parts. The printed circuit has
Douglas> a design date of 1985, while the IC's have 88-89 dates.
The only way I can think of is to take a large piece of paper, draw
the components (ICs, etc.), then trace each etch on the PCB. You
might use a felt tip pen to put a dab of color on each pin whose
connection you have marked on your drawing.
paul