Arduino is a programmable circuit board that makes it possible for the average developer to build custom hardware products.

This board also features 128 MB of RAM, 8MB of Flash and the usual compliment of Arduino pins in a Leonardo-compatible layout. Also on the SoC is a PCIE bus, Ethernet, a USB 2.0 host, and an SD card.

Above you can see [Hans’] creation next to the official Arduino USB-to-serial programmer. He used the same connection scheme ... The first board he assembled was too loose in the USB port ...