The Amazing $1 Microcontroller (2017)
One Dollar? Pah! I present to you the Padauk PMS150C three cent MCU. Its just one-time programmable, so better get it right the first time.<p><a href="https://hackaday.com/2019/04/26/making-a-three-cent-microcontroller-useful/" rel="nofollow">https://hackaday.com/2019/04/26/making-a-three-cent-microcon...</a>