A $2 Arduino, an ESP32, an STM32, and a Raspberry Pi can all be called development boards, but they are built for completely different jobs. 🤖🔧 An Arduino can read a sensor and control a motor with almost no overhead. An ESP32 adds Wi-Fi and Bluetooth for just a few dollars. An STM32 gives you the precise control often needed in industrial hardware, while a Raspberry Pi gives you something closer to an entire Linux computer. That difference matters because “dev board” covers a much wider range of hardware than it sounds like. Some boards are designed to do one job repeatedly with precise timing. Others can run servers, process camera feeds, handle networking, or even run smaller machine-learning models. Choosing the right board isn’t about finding the most powerful one. It’s about matching the hardware to what you’re actually trying to build. Once you understand that spectrum, projects like robots, smart-home systems, drones, data loggers, cameras, custom controllers, and weeken...