diy photosensitive light sensitive technology small production small invention maker technology scientific light control circuit production experiment

Product Name: Photosensitive Light Source

Item No.:DX 1 2 3

Package: Packaging bag

Product dimensions:105*77*35 MM

Weight per unit: 0.12KG

Number of boxes to be packed: 600

Box dimensions: 60*50*55 CM

Photosensitive lamp

After the self-oscillating multivibrator starts operating, an oscillation pulse signal is output from pin 3 of the IC. This signal is amplified by V3-V5 and then used to drive the EL for lighting. By adjusting the resistance value of RPl, the operating frequency of the self-oscillating multivibrator can be changed, and the duty cycle of the output pulses can be controlled, thereby regulating the brightness of the EL.
Under indoor lighting during day or night, the photoresistor RG decreases in resistance due to light exposure, causing Vl to become saturated and conduct, while V2 closes off. lC loses its power supply and stops working, and EL does not emit light. At night, when indoor lights are turned off, the resistance of RG increases, causing Vl to close off and V2 to conduct. The self-oscillating oscillator and output circuit operate normally, and EL turns on. Adjusting the resistance of RP2 can modify the sensitivity of the light-controlled switch.