NEGATIVE_VOLTAGE_FROM_A_POSITIVE_SUPPLY

Published:2009/7/16 1:25:00 Author:Jessie | From:SeekIC

By using a 555 timer to generate a square wave and voltage-doubling the output, a negative voltage that is almost equal to the positive supply can be obtained. The current available is up to 20 to 30 mA or so, depending on the regulation and voltage needed.



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