4 Oct
1999
4 Oct
'99
1:59 p.m.
The PC boards
that make up the backprojector make use of a unique
technology: the PC boards themselves are just plain old two-layer boards,
with the actual PC traces carrying only power and ground. All the actual
wiring is done by fine machine-laid wiring between pads, with all
the wire layers "potted" in a plastic compound. Obviously, reworking
such a PC board is extremely difficult, but it gives impressive component
densities for the time. The modern equivalent of this is multi-layer
PC boards, naturally.
-Dave McGuire