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- May 1972 ETI sound operated flash
March 24, 2006, 2:27 am
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I have a sound operated camera flash circuit that I built in the 70's.
It has the IC missing.
I thought that it was built from an English Practical Electronics circuit,
but the circuit appears very similar to the ETI 514B published in May 1976.
It does have a few differences however.
Does anyone have the May 1972 ETI that published the original ETI 514?
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