Using ADC Module of PIC Microcontroller with MPLAB and XC8

This project centers on interfacing an analog sensor simulation with a PIC16F877A microcontroller by utilizing its built-in Analog-to-Digital Converter (ADC) module. The circuit is assembled on a breadboard, where a potentiometer is connected to a designated analog input pin of the microcontroller to act as a variable voltage divider. By adjusting the potentiometer's wiper, you manually alter the analog voltage supplied to the PIC pin, sweeping continuously between ground and the reference supply voltage. To process this physical phenomenon inside a digital processor, the microcontroller's internal ADC module samples the continuous analog voltage and translates it into a discrete digital value based on its bit-resolution. Writing the software requires using MPLAB IDE along with the XC8 compiler to configure the special function registers that control the ADC channels, clock selection, and result formatting. Once the C code initializes the hardware and initiates a conversion cycle, the register captures the digital equivalent of the analog voltage. This setup effectively demonstrates how modern embedded systems bridge the gap between physical, real-world analog signals and computational digital logic, allowing engineers to read and evaluate sensor inputs programmatically.