How to modify the amplitude of a PIC16F88 digital output???

[Steve311]

Hi All; I am working with a project where the output changes with respect to frequency and duty cycle, and I would also like to modify the outputs in such a way to vary the amplitude of these signals (ideally with no external crcuitry).

What would be the best approach for this?

Thanks,
Steve

 

[3v0]

Hi All; I am working with a project where the output changes with respect to frequency and duty cycle,
and I would also like to modify the outputs in such a way to vary the amplitude of these signals (ideally with no external crcuitry).

What would be the best approach for this?

Thanks,
Steve

There is no way to change the amplitude of a PIC output bit without external circuitry. The bits are digital and you are asking for analog. It is possible to combine several PIC bits and create a simple DAC using resistors. Wikipedia
**broken link removed**

**broken link removed**Or you could use a digital pot like the ones sold by Microchip as one leg of a voltage divider.