This is a circuit that has function as LED Flasher. This circuit will flash a bright light of the LED (5000 mcd) to take attention getting devices to the alarm. This circuit is work with based on the two transistor as the control of the circuit. The component value that we used is not a critical component. This is the figure of the circuit.
Flash duration in the circuit is determined by R2 and C1 and it is approximately 3 time constant. For control the brightness of the LED by R3 with limits 20 milli ampere. R1 is provide bias for the transistor.
Flash duration in the circuit is determined by R2 and C1 and it is approximately 3 time constant. For control the brightness of the LED by R3 with limits 20 milli ampere. R1 is provide bias for the transistor.
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