Careful the most common cheapo such board uses 5v for io[0] even though it has a 3.3v regulator onboard. Shit design. 0. https://www.eevblog.com/forum/repair/c

Careful the most common cheapo such board uses 5v for io[0] even though it has a 3.3v regulator onboard. Shit design. 0. https://www.eevblog.com/forum/repair/ch341a-serial-memory-programmer-power-supply-fix/ https://www.eevblog.com/forum/repair/ch341a-serial-memory-pr...