Using a PIC as potentiometer

Community PCB Design
1

Hi,

is there a simple way to change a resistance valeu using a PIC controller - without using a POT and also for a Condensator.

I would like to change the value of an RC control (external to my PIC) using PIC logic.

Thank you

Marcel

2

Well that depends what the voltage range is. As well as what resolution you need.

3

Lookup digital potentiometers.

http://www.analog.com/en/digital-to-ana … index.html

http://www.maxim-ic.com/products/digi_pot/

http://www.onsemi.com/PowerSolutions/pa … ?id=100010

For variable capacitance lookup Varactors:

http://www.onsemi.com/PowerSolutions/pa … .do?id=827

http://www.nxp.com/products/diodes/varicap_diodes/