Here is a one transistor LED flasher circuit which will flash a super bright LED. The circuit is using single transistor as driver which is taking flash rate from the LED 2 which is a self flashing LED. The flash rate can be adjusted by changing the value of 1k resistor used in the circuit. The circuit is using 2N3904
transistor but you can use any NPN transistor available with you. The input power can be from any 6V DC battery or powersupply.

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