555 male and female voice electronic guest greeting circuit

Published:2011/6/2 1:02:00 Author:TaoXi | Keyword: 555, male, female, voice, electronic, guest greeting | From:SeekIC

The monostable delay circuit is composed of the IC1(555) and the R1，C1. When you areopening the door, the door control switch MK makes the pin-2 of 555 to connect with the ground, the 555 sets, the J closes, and J1-1 connects with the C4, the door control switch makes the pin-3 and pin4 of IC2 in the short-circuit state, and also the door control switch triggers the pin-3 and pin-4, so the circuit sends out the high pitch female voice thank you for coming , then the temporary stability time of the monostable circuit is up, J releases to connect the J1-1 to the C5, the circuit sends out the high pitch male voice thank you for coming . When you design the circuit parameters, the press time of the door control switch is about 3-4s, the time of broadcasting a word is about 1.4s, so we choose the monostable temporary stability time 1.4s



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