25 Sep
2002
25 Sep
'02
9:19 a.m.
Better still, if you are testing the cards one at a
time with an external
supply, tack on a 5V (set to 5.5 or so) crowbar on the output side of the
local 5V regulator -- no cut traces, only tacking on 2 wires
temporarily...
Peter Wallace
Peter, yeah, this seems like an easy approach. Question: could a simple
6.2V Zener be installed reverse-biased from the 5V regulator output to
ground? Seems like you'd want inline fuses between the unregulated supply
and the backplace as well for this kind of test...
Patrick