These two circuits flash two 5 watt to 21watt car lamps. The first circuit uses BD679 Darlington transistors and the second circuit uses a 555. This 12v Warning Beacon is suitable for a car or truck break-down on the side of the road. The key to the operation of the circuit is the high gain of the Darlington transistors. The circuit must be kept "tight" (thick wires) to be sure it will oscillate.
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