Friday, April 12, 2013
Micro Flasher Circuit Using 555IC
This is a simple and compact flasher circuit that can be used where ever a flashing LED is needed. The circuit finds application in flashing beacons, alarms automobile and more. The circuit is nothing but an astable multi vibrator based on IC NE 555 (IC1). This is the figure of the circuit.
The frequency of the oscillation depends on the values of R1, R2, R3 and C2. The LED glows when the out put (pin3) of IC1 goes high. The IC1 NE 555 can easily drive a LED. The resistor R4 acts as a current limiter for LED. The circuit is powered by a 6V battery or 6V DC power supply. If you don’t need frequent changes in the flashing rate use a preset for R2 and set it for the required rate. The capacitor C2 must be rated 10V.
The frequency of the oscillation depends on the values of R1, R2, R3 and C2. The LED glows when the out put (pin3) of IC1 goes high. The IC1 NE 555 can easily drive a LED. The resistor R4 acts as a current limiter for LED. The circuit is powered by a 6V battery or 6V DC power supply. If you don’t need frequent changes in the flashing rate use a preset for R2 and set it for the required rate. The capacitor C2 must be rated 10V.
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