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Science and education toy science experiment model airplane novelty toy educational toy
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Related items
Product Name: Photocell Light
Product Number: DX 123
Package: Packaging Bag
Product Size:105*77*35 MM
Weight per unit: 0.12KG
Packing Quantity: 600
Box Size: 60*50*55 CM
photocell" 或 "light-sensitive lamp
After the self-oscillating multivibrator starts oscillating, it outputs oscillation pulse signals from IC's pin 3. These signals are amplified by V3-V5 and then drive the EL to light up. Adjusting the resistance value of RPl can change the working frequency of the self-oscillating multivibrator, controlling the size of the output pulse duty ratio, thereby regulating the brightness of the EL.
Under daylight or at night with indoor lighting, the photoresistor RG is illuminated, causing its resistance to decrease, which allows the diode Vl to conduct in saturation and V2 to cease conducting, thereby shutting down the inductive coil lC and stopping its operation, causing the EL to stop emitting light. At night, when the indoor lighting is turned off, the resistance of RG increases, causing Vl to cease conducting and V2 to conduct, allowing the self-oscillating multivibrator and output circuit to operate normally, causing the EL to light up. Adjusting the resistance of RP2 can change the sensitivity of the photocontrolled switch.
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