Light control switch circuit
Source: InternetPublisher:兰博 Keywords: Switch circuit light control switch relay Updated: 2020/04/15
Shown is a light-controlled switch circuit with a simple structure . It works stably and reliably, and is suitable for automatic power supply
control systems for electrical appliances that work at night. IC 1 in the circuit is an operational amplifier UC741C, which is used as a voltage comparator. Its non-inverting input terminal @ pin is adjusted
to obtain a suitable reference voltage by adjusting Rl, and is compared with the voltage on the inverting input terminal ② pin to determine the voltage of its output terminal. level. The voltage on IC 1② pin
is obtained by the series and parallel voltage division of RL, Ri and R2. When there is light, the relay does not work, and when there is no light, the relay operates.
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