Home>Electronic Modules>Development Board>Photo-Sensitive And Light-Controlled Sound-Light Alarm Kit Electrician Welding Practice DIY Production Parts
Photo-Sensitive And Light-Controlled Sound-Light Alarm Kit Electrician Welding Practice DIY Production PartsItem NO.: Photosensitive kit
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Photo-Sensitive And Light-Controlled Sound-Light Alarm Kit Electrician Welding Practice DIY Production Parts
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- Product Name: Photo-Sensitive And Light-Controlled Sound-Light Alarm Kit Electrician Welding Practice DIY Production Parts
- Item NO.: Photosensitive kit
- Weight: 0.1 kg = 0.2205 lb = 3.5274 oz
- Category: Electronic Modules > Development Board
- Tag: Photo-Sensitive And Light-Controlled Sound-Light Alarm Kit , DIY Production Parts
- Creation Time: 2024-05-05
Photo-Sensitive And Light-Controlled Sound-Light Alarm Kit
Product Information:
VR is an adjustable resistor used to adjust the sensing sensitivity. GR is a photosensitive resistor. When the light is bright, the resistance value of the photosensitive resistor decreases, the base current flowing into Q1 is large, the voltage of the triode collector decreases, D1 is lit, R2 is a current-limiting resistor, while the base current flowing into Q2 through R1 is also large, Q2 enters the saturation state, SP is a buzzer, and it starts to sound the alarm after receiving the current.
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