Posted by Circuits Arena on Thursday, 25 December 2014
Proximity Sensor Switch Circuit is the artlcle explaining Proximity Sensor : The circuit diagram of a proximity sensor switch circuit that finds a lot of applications in many fields.The circ...
Proximity Sensor:
The circuit diagram of a
proximity sensor switch circuit that finds a lot of
applications in many fields.The circuit is based on a magnetic reed
switch(S1) as the
proximity sensor. A monostable multivibrator based on
NE555 (IC1) and a toggle flip flop based on CD4013 (IC2) does the rest
of the circuit.
Fig.Proximity Sensor Switch Circuit
- When a magnet is reached in proximity of S1 it closes to give a negative
trigger at pin 2 of IC1.The output of IC1 goes high for a time
determines by R2 and C2.
- This clocks the IC2 wired as a toggle flip flop.The output (pin 1 ) of
IC2 goes high and the transistor Q1 is biased to ON.The relay is
activated and so do the equipment connected to the relay and the LED D1
glows when IC1 is triggered.
Parts List of This Circuit Shown Above Circuit Diagram.
