Elektor Team
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Voltage inverter

Voltage inverter
A negative supply voltage may be obtained easily with the use of a special inverter IC. Such ICs are not always readily available, however. Fortunately, if the current drawn is not excessive, a standard HCMOS-chip may be used. The present circuit is based on a Type 74HC14, which contains six Schmitt triggers, whose combined gates can deliver a fairly high output current. Moreover, such devices can be made to oscillate easily.
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