The nanoCH32V003 is a RISC-V dev board available for $1.50

https://www.electronics-lab.com/the-nanoch32v003-is-a-risc-v-dev-board-available-for-1-50/

nanoCH32V003 is a development board that was created by MuseLab and is based on CH32V003F4U6, which was manufactured by QinHeng. On the board are a reset button, an LED, and a crystal oscillator that operates at 24 MHz. The 1-wire serial debug interface (SDI) is supported, and all of the general-purpose input/output (GPIO) pins are […]