When the need arises to convert voltage readings from an analog sensor into a pulse train, a low-end microcontroller offers a versatile solution. The design in Figure 1 uses an 8-pin PIC 12F683 to provide a pulse train that’s proportional to the sensed input voltage. This is useful, for example, when transforming a sensor signal into a format that’s compatible with a basic digital or GPIO input. The output operating range ranges between 0 to 500 pulses for an input voltage of 0 to
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