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The car back-up alarm (3)

2017-01-17 20:30  
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The car back-up alarm (3)
The car back-up alarm that will be introduced adopts the voice integrated circuit, which can make the alarm sound of ding-dong, back up to remind the pedestrian of safety.The working principle of the circuitThe car back-up alarm consists of the sound generator and the op-amp output circuit, see as figure 7-123. The sound generator circuit consists of the resistors R1-R3, capacitors of C2 and C4, regulated diode VS and voice integrated circuit IC