Re: ? Overloaded Auto Chromatic Tuner

William R. Walsh wrote:
It's a frequency identifier. How can I test it? Is it replaceable or
even worth it?

It's actually an 80C51 microcontroller. If it is fried, you'll not only have
to replace it, but also the code that was programmed into it. Finding
another 80(C)51 isn't going to be so bad. It's getting the code that makes
it run that will be the hard part. You'd almost have to find another example
of a working unit and try to get the code out of it somehow.

The code is to identify an input frequency. It's an instrument tuner,
so the code is pretty important.

Have you tried the manufacturer to see if they would repair it?

No, it's really old and would probably cost much, much more to have
professionally repaired than to buy a new one. Part of why I want to
repair it myself (besides that I'd rather not spend money I don't have)
is to do an electronics project since I haven't done one in a while.
Also, I feel awful that I wasted a perfectly good thing, and would like
to alleviate that feeling.

--
Alec S.

.

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