Hi, I'm a PIC newbie/hobbyist, and I'm currently doing a project that requires comparison of 4 voltage levels ranging from ~1v - 5v. So I was wondering if it can be done by using PICs and programming, specifically the PIC16F84A. If it's not possible then can someone recommend me a way to go about it?

Thanks in advance.

 

With this PIC you cant do it because it has not built-in ADC. You can connect external ADCs but is easier to work with a PIC with built-in ADC like the PIC16819. Its not the only one, you can search for other PICs at www.microchip.com

 

You can also use a quad voltage comparator, although circuit and signal details would help.

 

better use another member from PIC family better PIC16F72 which has built in ADC