a good 48hours staring at a circuit that wasn't working thinking all
sorts of rude things about the quality of this and that and how crap
the advice was that website B and colleague B gave me to find I hadn't
connected power to all the components or something as equally daft -
In other cases I had made up simplified logic in my head that turned
out to be inadequate for the complexity of the circuit I had made
(especially true of op-amps and analog electronics) ...
One particular circuit I had reverse engineered from a product with a
mind to make a few for my mates (component costs were a factor of 200x
cheaper than the bought product) .. well anyway I had drawn up a cct
diagram and had a few months later used it to build a working circuit
at least twice but from then on all attempts to remake it have
failed... I cannot for the life of me see what is different about my
latest attempts compared to the working versions, swapping all the
individual components shows nothing at fault ... The amount of time
spent on it soon made the cost of a new bought item worth while again.
anyhoo - these are some reasons why I tend to rather blame myself
first, but since life must go on I'll ask fro help from such forums
and email groups ...... aaaaaaaaand to cut a long story short:
blow me down >> one of the probes ground dingalings isn't showing
continuity from the alligator clip to the end of the BNC-ish
thingy-dingaling at the other end.
5mins later - wire was broken at spring clip end (other end of
alligator clip) ... cut and resoldered ... WORKING
right on the money!
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