Voltage-To-Frequency Converter (VFC) with 555 IC

Voltage-to-frequency converter (VFC)  circuit is shown in the schematic diagram below. The circuit employs 555 IC as the core of its function.

Voltage To Frequency Converter VFC with 555 IC circuit schematic diagram

This circuit uses +5V and -5V supply voltages, and the input is limited to 0-2V. You can adjust the zero point by grounding the input and adjust the 4k7 pot to obtain the lowest frequency oscillation. [Circuit’s schematic diagram source: lh-electric.4t.com]

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