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此开关电路，它可以是有用的许多things.which可以被控制电路的一个输出铃或其它声源电路或控制继电器或SCR（RY1，和SCR2的电路，仅用于与交流电压源）触点开关（S1，S2和S3）在并联电路中，它被用于控制连接的开关电路，可以有效的两个晶体管的工作是高度不确定的交换机，并做防盗报警器电路或控制报警信号。不会触发错误，因为没有其他的局部噪声传导的SCR2的时间是非常稳定，因为电阻1K作为触发relay.When平行和按下开关S2，它通常是关闭的用于断路器。继电器停止工作。LED1访问的晶体管Q2的发射极引脚，指示灯会亮，当电路工作原理。
This switches circuit,It can be useful many things.which a output of the circuit can be controlled a bell or other sound source circuit or control relay or SCR.(a circuit for RY1,and SCR2 are used with AC voltage source only) The contact switches (S1, S2 and S3) in the parallel circuit,it were used to control a connect switched circuit, which can usefully for a burglar alarm circuit or control alarm signal.
The two transistors work as switches that are highly uncertain,and do not trigger an error,because no other noise.The conduction of the SCR2 was very stable, because the resistance 1K as parallel to the relay.When the trigger and press the switch S2, which is normally closed for the circuit breaker. To relay to stop working. The LED1 to visit the emitter pin of the transistor Q2, it lights up when the Circuit works.
This switches circuit,It can be useful many things.which a output of the circuit can be controlled a bell or other sound source circuit or control relay or SCR.(a circuit for RY1,and SCR2 are used with AC voltage source only) The contact switches (S1, S2 and S3) in the parallel circuit,it were used to control a connect switched circuit, which can usefully for a burglar alarm circuit or control alarm signal.
The two transistors work as switches that are highly uncertain,and do not trigger an error,because no other noise.The conduction of the SCR2 was very stable, because the resistance 1K as parallel to the relay.When the trigger and press the switch S2, which is normally closed for the circuit breaker. To relay to stop working. The LED1 to visit the emitter pin of the transistor Q2, it lights up when the Circuit works.
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