Sledgehammer keyboard Sledgehammer Keyboard The Sledgehammer Keyboard is a scaled-up version of the classic desktop peripheral we use every day. The first iteration, rele SHKB v3 tech notes Older versions of SHKB were dependent on a hacked keyboard logic circuit. For this rebuild I moved to an Arduino Leonardo. SHKB v3 [carousel] The third major rebuild of SHKB is based on the ITU E.161 internati