As mentioned before, 4 out of 6 GPIOs in a PIC12F683 also provide analog-to-digital converter inputs with 10-bit resolution. They are GP0-GP2, and GP4. In this experiment we will feed an analog voltage to one of the ADC inputs (say AN0, which is GP0) and display the output digital value on a hyper-terminal window on PC. The analog voltage will be simulated with the potentiometer on our board.
Experimental Setup:
Connect the output of potentiometer (POT2) to AN0 (pin 7). GP5 (pin 2) will serve as TX pin for Software UART so connect it to input Tx of TTL to RS232 Level Shifter circuit. Also connect Rx (2) and Gnd (5) of a RS232 port to the board. This is similar to what we did in Experiment No. 2.
Circuit diagram for each experiment may not be available separately because they are conducted with PIC12F683 development board that I made. So, the readers should first see the schematic of my development board.
