Multi-function electric fan control circuit with crickets sound using PT2124

Published:2012/11/13 20:13:00 Author:Ecco | Keyword: Multi-function , electric fan , control circuit , crickets sound | From:SeekIC

As shown in the figure, when you press speed key to start the fan, in each case, it is operates with stroke. M-end (15 feet) outputs drive signal which is added to VT1 (PNP tube)'s b pole by R6 to make VT1 get conduction, e pole's low level signal can triggers IC2. IC2 uses animal voice simulation integrated circuit KD-56020, once it is triggered, the animal voice is broadcasted as signal which is amplified by Darlington-level with VT2 and VT3-l, then it drivies speakers b to emit sound.



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