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?
"Ralph"
** If the IC has 8 pins, I bet it is an LM301A.The dudes at ETI were besotted with them in the early '70s.
Still an impressive device.
....... Phil
Wrong guess Phil
I have the mag, it was a 741.
Russell
circuit,
"Russ_Verdon"
** Ok - so they were slumming it that day ....Pukes .....
........ Phil
Thanks to Russ, I can state that the 514 used the 741 and the latter 514B used the 301, as Phil guessed. Ralph
Phil appears to be good at that (guessing that is). :P Pity his guessing (mostly incorrect) extends beyond the sphere of electronics into other areas of which he has absolutely no knowledge or expertise.
Cheers, Alan
"Ralph"
** That was no mere "guess".I built a 514B back in 1976.
Took a nice pic of a yellow balloon bursting with my Pentax KX.
....... Phil
"Ralph" wrote in news:e09ku1$86j$ snipped-for-privacy@mws-stat-syd.cdn.telstra.com.au:
LOL, so they *were* slumming it that day!
GB
-- "Men will never be free until the last king is strangled with the entrails of the last priest." (Diderot, paraphrasing Meslier)
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