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Electronic birthday candles circuit

Electronic birthday candles include a "candle" and a " Happy Birthday . " It uses the traditional birthday candles mimic the shape and the " points "and" blowing " candle mode of operation , very interesting , circuit as shown. It consists of a 412 input NAND gate CD4011 , of which the door D3, D4 composition of RS flip-flop , flip-flop the two output states use to control the candle " lit "," blow out "and the birthday song playing And stop . Door Dl, D2 form two linear amplifier and microphone MIC receiver signal composed of inflatable voltage conversion and amplification of the signal to trigger the formation of enough voltage to make RS flip-flop flip .

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Electronic birthday candles circuit