[Hans Peter] wanted to move away from using full Arduino boards in ... in order to test it on a breadboard. The first board he assembled was too loose in the USB port, but he added some tape ...

A few things might inhibit an Arduino, AVR, or PIC user from making ... So if you have a breadboard and a USB to serial adapter, you could build the bare bones version of this for about $6 and ...

Compatible with Arduino and Raspberry Pi, it can almost meet all your needs. (Without Microcontroller Board) Breadboard and Power Supply Modules-Include various LEDs, resistors, buttons ...

It also has fewer pins than other boards, and its USB port is somewhat outdated ... make it perfect for prototyping with a breadboard. However, Arduino also offers this board without headers ...