nanoKeyer (based on K3NG Arduino keyer)

This is an open source and open hardware Arduino based keyer.
The nanoKeyer is suitable as a standalone keyer or for keying the radio via the USB port by using the K1EL Winkeyer protocol from a connected computer and your favored contest logging software. By means of the K3NG firmware, it can also be used as a computerless keyboard keyer by attaching a PS2-Keyboard to it.

Full-assembled PCB
(all parts are soldered, nanokeyer_rev_D firmware is burned to Arduino Nano):
Dimensions: 99*70 mm
Weight: 80g
Cost: 40USD

Full-assembled with metal enclosure
Dimensions: 112*75*35 mm
Weight: 300g
Cost: 70USD