[sdiy] My Fancy Paperweight, the ESQ

[David G. Dixon]

Ah, the glories of digital!  Why not just redesign the whole circuit in
software on a microcontroller?  You should be up and running with a far
superior circuit before the weekend!

(Insert annoying winking emoticon here)


> It was suggested that given my problems with it (after replacing the
> memory battery, it still stays stuck on a screen telling the make, model,
> and OS)(MIDI doesn't work either btw), there was liable to be some
> something wrong with one of the logic ICs.
> 
> Well, how ought I go about testing that sort of thing? Just a logic probe
> and datasheet handy for each chip, or need I so much as a logic
> comparator? There's one on eBay now for $40 shipped, though I wonder if it
> would be that worthwhile an investment. I already paid that much for the
> ESQ alone (though if that'll get it to work...).
> 
> If a probe is enough, and precautions and things to bear in mind there?