MINIMUM_COMPONENT_FLASHER

Published:2009/7/6 9:05:00 Author:May | From:SeekIC

Opening SA, changes the indicator lamp from flashing to steady-lit condition. The 6-V incandes-cent lamp on the collector of Q2 requires about 0.3 A. A 1-KΩ load resistor limits Q1's collector cur-rent to about 6 mA. The circuit is, therefore, asym-metrical with respect to the on currents of the transistors, allowing use of a much smaller transistor for Q1 than for Q2.



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