This document describes a digital fuel level monitoring system for internal combustion engines. The system uses a microcontroller to monitor the fuel level in a tank. When the level reaches a low threshold, an AC/DC motor pump is activated to fill the tank. The pump automatically shuts off when the maximum level is reached. Relays are used to control the pump motor based on signals from the microcontroller. The system aims to accurately monitor fuel levels and filling to avoid wastage through an automated process that reduces manual labor and maintenance needs.