Light control switch circuit controlled by flashlight 2
Source: InternetPublisher:走马观花 Keywords: Switch circuit flashlight light control switch Updated: 2021/09/12
It uses 555 time base integrated circuit A and uses a bidirectional thyristor V as a non-contact switch,
so the circuit is simple, has good anti-interference performance and is stable in operation. Photosensitive transistors VTi and VTz are used as detection components.
In Figure 2-103, the resistor Ri plays the role of anti-interference and improving circuit stability.
When the flashlight shines on the phototransistor VTz, the triac V is turned on and the load is turned on; when the flashlight shines on
the VTi, V is turned off and the load is cut off.
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