Robert Ammerman wrote:

> Since you already plan to bring your analog inputs out to a test jig,
> perhaps you could add circuitry to the test jig to allow the PIC to
> measure the supply current to its own board using those inputs. Then you
> could not only determine if an LED lights, but also if more than one
> does!

A variation of this is to use a supply for the test setup that has a
defined source impedance. This would allow you to measure the voltage drop
in supply voltage caused by the LED. Since you have a voltage reference,
you don't need anything additional for this besides the defined supply
impedance.

Another option would of course be a nail bed with pogo pins and a custom
test controller -- if the production numbers warrant the effort. It
wouldn't have to be a test bed for the whole panel; probably it's feasible
to do it board by board.

Gerhard

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