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Light Controlled Sound and Alarm kit, Photosensitive And Fun DIY Electronic Production Parts
Home  ⇨  Light Controlled Sound and Alarm kit, Photosensitive And Fun DIY Electronic Production Parts
Light Controlled Sound and Alarm kit, Photosensitive And Fun DIY Electronic Production Parts
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Light Controlled Sound and Alarm kit, Photosensitive And Fun DIY Electronic Production Parts

$39.21

500 in stock

SKU: 3256808347485277 Category:

Description

  • Brand Name: EMDSXGO
  • Accessory Type: Extension Board
  • Battery Included: No
  • Origin: Mainland China
  • High-concerned chemical: None
  • Compatible With: new


YOU CAN ADD ALL ITEMS TO YOUR CART,THEN PLACE ORDER TOGETHER, SO IT WILL COST ONLY ONE  SHIPPING COST ACCORDING TO THE TOTAL WEIGHT, THANKS MUCH】



 
Product Features
Product characteristics
This circuit is used to detect environmental light and emit sound and light signals when the light is bright.
W1 is an adjustable resistor used to adjust the induction sensitivity. GMDZ is a Photoresistor. When the light is bright, the resistance of the photoresist decreases, the base current flowing into Q1 is large, the voltage of the triode collector decreases, D1 is lit, and R2 is a current limiting resistor. At the same time, the base current flowing into Q2 through R1 is also relatively large. Q2 enters a saturated state. SP1 also starts to sound an alarm when the buzzer is powered on.
 
 
 
 
 
 
 
 
 
 
 
 
 
 



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