When I'm doing my hobby projects, I'll often prototype on an Arduino UNO with breadboard. Then in "production" I'll buy a stock ATMega328 and a couple supportin

When I'm doing my hobby projects, I'll often prototype on an Arduino UNO with breadboard. Then in "production" I'll buy a stock ATMega328 and a couple supporting components and build it right onto my perfboard. Great guide here on how to do that. https://www.arduino.cc/en/Tutorial/ArduinoToBreadboard https://www.arduino.cc/en/Tutorial/ArduinoToBreadboard If you want even more control, you can just use the avr C libraries with any atmega328, Arduino included.