Each ESP32 controls two screens over SPI, with a separate pin for synchronisation. At first, Charles used a perf board, but soldering was difficult, so he designed a custom PCB to make the connections ...

Radio Frequency Identification is widely used in contactless payment cards, National Highway Tollgate systems, and in security passes. By integrating an RFID reader with an Arduino, you will be able ...

We wager you haven’t you heard the latest from ultrasonics. Sorry. [Lindsay Wilson] is a Hackaday reader who wants to share his knowledge of transducer tuning to make tools. The bare unit he ...