As shown in the figure, the timer is composed of 555 as the core. When the switch AN is pressed, it is released. The timing starts. Press AN to set the trigger end of 555. The 3 pin is high level. The normally closed contact of the circuit. The exposure lamp is lit, the servo C is charged by VT, RP, and in order to keep the charging voltage linearly increasing, the field effect transistor 3DJ8 is used for constant current charging.
KNB1-32 Miniature Circuit Breaker
KNB1-32 Mini Circuit breakers, also named as the air switch which have a short for arc extinguishing device. It is a switch role, and also is a automatic protection of low-voltage electrical distribution. Its role is equivalent to the combination of switch. Fuse. Thermal Relay and other electrical components. It mainly used for short circuit and overload protection. Generally, According to the poles, mini Circuit breaker can be divided into 1P , 1P+N , 2P, 3P and 4P.
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