Light ophthalmic light switch circuit (1)

It is a light remote control light switch circuit . The remote control can be used as a flashlight or toy laser pointer. When using
, just use a flashlight to shine
on the photoresistor RL2,
RI.2 shows low resistance, VT2
is turned on immediately, the relay K
absorbs the platform, and its power platform contact kl
closes to self-lock the circuit,
and the other moving contact k -2 is closed
to make the electric lamp E energized and emit
light. When you need to turn off the light, you only
need to illuminate RI.1 again, and RI.1 will suddenly change to a low resistance, causing VT1 to quickly turn on. The turn-on of VT1 will
pull down the base potential of VT2, forcing VT2 to cut iL and release K. Its two moving and closing contacts jump open and the light goes
out. The function of VD2 is to raise the base potential of VT2 when it is turned on, which is beneficial to the shutdown operation of irradiating RI.1.
The working power supply of this machine is supplied by the capacitor (1z step-down, VD3-VD6 rectifier, vs voltage regulator and [1. filter]. RP1 and
RP2 are used to adjust the control sensitivity of turning off the lights and turning on the lights respectively.
  RL1 and RP2 are both used M (; 45 type photoresistor , the larger the multiple of the difference between the light resistance and the dark resistance
is, the better. They should be made separately. We should add a shading tube to eliminate the interference of ambient light on them. However, the shading tube should not be too
deep and If it is too small, rain will make it difficult to accurately trace the remote control operation. K should use a working voltage of 12V, a small electromagnetic relay with two sets of switching
contacts , such as JRX-13F, DC12V type, etc. f, should use a voltage-resistant
LBB type polyethylene capacitors above 400v , no special requirements for other components.