Sitting at the heart of the Ploopy Headphones preamplifier is a chip called “RP2040”. It’s the microcontroller, or MCU, recently made and released by the Raspberry Pi Foundation. It’s cheap, it’s available, and it punches way above its weight. This post will explain why we chose it for the Headphones preamp, as well as the… Continue reading RP2040: The Little Engine that Could