Friday, March 6, 2020

AUTOMATIC STREET LIGHT

Rakshitha.M
Sindhu.M
2nd Year B.SC, NCMS


Components Required:

  1. LDR
  2. Resistor 1k
  3. LED lights
  4. Transistor 2222a
  5. Battery 9v

Working:
When the power is supplied to the circuit it automatically turns on and off depending on the intensity of light. During light the LDR gives high resistor due to this the voltage passing through the base will become less than 9v and then LDR glows. During day time LDR gives low resistance due to this the voltage through the base will become greater than 5v and it switches the current to emitter and then light turns off.

Circuit:



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