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DRIVE A RELAY USING IC 555

TITLE:

          DRIVE A RELAY USING IC 555

CIRCUIT:


COMPONENTS:

IC 555                           x 1
12v battery                   x 1
Diode 1N4004              x 1
Relay 12v                     x 1
Resistor 220k               x 1  

DESCRIPTION:

  • This is the simple circuit to drive a relay.When pins 2 and 6 are connected as an input the chip requires only about 1 uA to activate the output.
  • In figure A output will be opposite to that of input.Figure B has output same as input i.e for logic high input high output is obtained. Important thing to be noted that input should be 2-3 V for output to be low and 1-3 V for output to be high.This is called HYSTERESIS and prevents any noise on any input.

APPLICATIONS:

  • This can be used to drive devices via any microcontrollers.

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