MSP430F149 alarm circuit

Published:2011/7/4 0:35:00 Author:John | From:SeekIC

The main part of the circuit is to drive a buzzer. Once one end is grounded to the buzzer, the other end is connecting with the chip to take effects. Taking the drive capability of MSP430F149 into account, an amplifier is needed. The picture shows the implementation of the alarm circuit. It can be seen through the figure that acquisition circuit is simple and practical.To reduce the effects from the power supply’s input ripple, a 0.1μF capacitor is added to the pin feet of the power supply for filtering.



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