Over on EEVblog there was talk of a 3 cents uC from Padauk: (w/ several follow-ups) https://www.eevblog.com/2018/11/07/eevblog-1132-the-3-cent-microcontroller/

Over on EEVblog there was talk of a 3 cents uC from Padauk: (w/ several follow-ups) https://www.eevblog.com/2018/11/07/eevblog-1132-the-3-cent-microcontroller/ https://www.eevblog.com/2018/11/07/eevblog-1132-the-3-cent-m... That 3c is packaged & all :-) One-time programmable iirc.