$1 Microcontrollers (2017)
This is a good article but it's a few years old, and out of date now.  I can't see its date with my current adblock settings.  It would be great if someone could find it and put it in the title.There are stupendously powerful $1 microcontrollers now, including the RP2040 (dual core cortex m0+ with 264KB ram on the chip), ESP32-S2 (Espressif core with 400k of ram and wifi), and ESP32-C3 with wifi and RISC-V core and again something like 400k of ram.Jay Carlson also has a series about microcontrollers as cheap as THREE CENTS, i.e. the famous Padauk 3 cent MCU:https://jaycarlson.net/2019/09/06/whats-up-with-these-3-cent...