A transistor photoelectric controller circuit

It can be said that H1 uses the photoelectric conversion principle
to control the light control operation of electrical equipment. The circuit is shown in Figure 2-26. When the visor covers
the YUAil'd of the spotlight HL, the photosensitive diode n shows the electric current of Yin vnwcr:. I annoyed body tube U saturated conduction, ¨ cut lL. Relay
, -bt for. After moving the light plate, the resistance of the photosensitive tube ¨acting as the lighting lamp IiLfFj is very small
. The normally closed contact is broken, and
it is powered by the circuit to cause a power outage and stop the operation. The road towel lamp E'L is used as
the indicator for the action of the relay J. When the action is carried out, the E/L light is switched on.
    In this experiment, the light-shielding switch can also be used to change the on-off beam of the small open signal SA. Photoelectric control.