Microcontroller demo boards such as the Arduino UNO are ubiquitous on Hackaday as ... can’t really be called a board since there is no PCB. Instead of the traditional fiberglass, [Jiří Praus ...

A right-sized container for the etching solution is placed on the tray, where you can drop your PCB. To make this project yourself, you'll need any old CD/DVD player, an Arduino Uno board ...

It also helps that the whole thing is put together on perfboard with jumper wires; no PCB fabrication required ... The chip gets programmed in an Arduino Uno and then transplanted into the ...