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i was also confused by the usage of schmitt triggered ttl , but his website says "it works" .. :roll: ... hmmm..audioguru said:I don't think a crystal mic has enough current to force the input of an LsTTL gate low.
I don't think a Schmitt trigger inverter will oscillate with its input directly connected to its output.
Maybe miracles happen.
Watch out for circuits on the web. Maybe his wire from the output of the Schmitt trigger inverter to the input had resistance. Then it would oscillate.akg said:his website says "it works" .. :roll: ... hmmm..
And propagation delay. Note the tuning capacitor on the output which uses the output resistance to create variable delay, and hence variable frequency.audioguru said:I guess the output of a 74LS13 must have some output resistance that would allow it to oscillate. Right?
as far as i know.. electronics is a science.. so is there any chance for miracles ?? if it works then there should be some reason .. the best thing would be to test it..does any one has the ic , and a 5min to spare?? . (i have time but no ic :wink: )audioguru said:Maybe miracles happen.
akg said:as far as i know.. electronics is a science.. so is there any chance for miracles ??
eblc1388 said:akg said:as far as i know.. electronics is a science.. so is there any chance for miracles ??
Certainly, according to Mr. M.... :shock:
hmm...... :roll: ....u r a veteran so no arguments...Nigel Goodwin said:A miracle is simply something you don't understand YET! - so there's certainly scope for them in electronics.