Can you get a computer chip for $5? It's called an ESP32, and it's the same microcontroller found inside countless smart devices and loT products. For just a few dollars, you can buy one mounted to a development board, giving you easy access to power programming, and all of its input/output pins. Despite their tiny size, these boards can interface with sensors, motors, relays, displays, and countless other electronic components. Think of it as a tiny programmable brain that you can teach to monitor, control, or automate a specific task. They're incredibly popular for hobby projects, but they're also found in commercial products and industrial applications. If you've ever wanted to start building your own electronics, an ESP32 is one of the best places to begin.