Discipad is a 17-key numpad assembled with only through hole components, including usb type-c.
Precompiled firmware can be found here.
Kit Includes 1 x Discipad PCB 1 x Discipad Acrylic Component Cover 1 x Discipad Acrylic Bottom Plate 1 x ATMEGA328P-PU Microcontroller 1 x 28Pin Microcontroller Socket 17 x Diodes (Through Hole) 2 x Zener Diodes 1