Hello friends! Today, we are starting our microcontroller tutorial series from the basics. Before connecting a PIC, installing a compiler or writing an LED-blinking program, we need to understand what a microcontroller does and how its software interacts with an electrical circuit. Think of a project that reads a push button, changes a pattern of lights and reports its operating state. A microcontroller can coordinate those actions by repeatedly reading inputs, applying programmed rules and updating outputs. The same basic idea appears in sensor loggers, small robots, appliance controls and many other embedded systems. In this series, our detailed hardware example will be the PIC18F452. We will first learn the general ideas, then study that device's connections and development tools. You d ...