Teensy 2.0 Keyboard Controller / USB Development Board w/ Pins (PJRC)
Programmable USB Keyboard Controller IC in a QFN28 chip or DIL28 Module
Chip Usb Keyboard | Game Keyboard Module | Usb Keyboard Module | Us Keyboard Chip - Usb - Aliexpress
USB Laptop Keyboard Controller
Dr. Monk's DIY Electronics Blog: Hack a USB Computer Keyboard to Make a Synth Pedal Board
USB keyboard controller and pi zero - Raspberry Pi Forums
YDKB Keyboard Controller Board USB/BLE Controller for HHKB Pro2 Series | eBay
Amazon.com: SJ@JX Development Keyboard Encoder Board Game Controller DIY LED Keyboard Development Board Media Music USB Encoder 88 Keys Arcade DIY Kit : Electronics
YDKB Keyboard Controller Board USB/BLE Controller Type C Interface for HHKB Pro2 | eBay
YDKB Keyboard Controller Board USB/BLE (Type C Interface) for HHKB Pro2 Series | eBay