This document describes a simple automatic street light circuit that uses a piezoelectric transducer and photoelectric transducer to turn on LED or bulb street lights when a vehicle passes. The piezoelectric transducer produces energy from vehicle movement that powers a battery and the photoelectric transducer system, causing the street lights to illuminate as light hits the photoelectric transducer. The automatic street light circuit has applications for balcony, staircase, parking, street and garden lighting.

1. Smart and automatic street light
Many of the people have a phobia of
darkness, so to assist them in such situation,
we have explained a simple circuit. It will
automatically turn on street light in the way of
LEDs or bulb coupled with relay.

2. DIAGRAM

3. Working principle
 When vehicle start and it push
the Piezoelectric transducer then
emf produce that energy stored
in battery and battery connect
with photoelectric transducer
system and when light fall on it
the street light brighten

4. APPLICATION
 Balcony/ staircase /parking light
 Street lights
 Garden lights