hero0765
Member level 2
hi:
here is a alarm speaker amplifier circuit , there is two MCU IO pins to driver the circuit to make the alarm speaker sound different alarm voice. But I have two question here :
1. the circuit is made of four transisters. how do the four transisters work?
2. how do I change the MCU IO signal to make the circuit work?
thanks!
here is a alarm speaker amplifier circuit , there is two MCU IO pins to driver the circuit to make the alarm speaker sound different alarm voice. But I have two question here :
1. the circuit is made of four transisters. how do the four transisters work?
2. how do I change the MCU IO signal to make the circuit work?
thanks!