Pro Micro ATmega32U4 5V/16MHz

Your basic microcontroller using an ATmega32U4 chip.  This is the go to option for doing your build on a budget.  I have been using these for years with great results.  Available with the traditional micro USB connection or the increasingly more USB C connector.  All micro USB pro micros I have encountered have a somewhat fragile USB connection (USB C does not have this).  Care needs to be taken when plugged in but not installed in the case.  

Features:

• ATmega32U4 chip
• 2x 12 pin headers included
• Standard for keyboard builds