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Non89 Posted - Nov 01 2010 : 8:27:18 PM
want to make a doorbell , after pressing 3 time or 5sec after without responce, another recorder circuit will work for record the visitor voice.... so how can i mix up the circuit, is the sensor needed???
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Aaron Cake Posted - Nov 07 2010 : 10:23:01 AM
3 tries, 5 seconds, or both?

I think you should only base this on time, not presses. Many people by default press a button more then once, as dumb as it is, it is just human behaviour.

Waiting 5 seconds is easy....just set up a 555 timer in one shot configuration (Google for the schematic).

Recording the voice is harder...easiest would be a tape recorder with a remote jack.

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