Programmable USB keyboard controller module simulates keystrokes for up to 64 keys
Peripherals
USB Camera Adapter, USB Male to Female OTG Data Sync Cable with Charging Port Compatible with iPhone, iPad, Card Reader, USB Flash Drive, MIDI Keyboard Controller - White - Walmart.com
Keyboard-Controlled Reset Circuit
40% Keyboards: Raspberry Pi 400 keyboard controller
Amazon.com: PCsensor Metal Single Pedal USB Foot Switch Programmable Keyboard Mouse Shortcut Compatible Medical Instrument Game Controller Transcription Push to Talk (Mechanical Switch) : Electronics
Keyboard controller - Deskthority wiki
Building a USB - HID Keyboard (DIY on a prototyping board) - YouTube
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CH9350L LQFP-48 CH9350 LQFP48 USB Keyboard Mouse to Serial Communication Control Chip Controller IC Original
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USB Keyboard/Mouse Combo Controller In Chip & Evalboard
Bluefruit EZ-Key - 12 Input Bluetooth HID Keyboard Controller [v1.2] : ID 1535 : Adafruit Industries, Unique & fun DIY electronics and kits
Keyboard controller - Deskthority wiki
Programmable USB Keyboard Controller IC in a QFN28 chip or DIL28 Module
Laptop Keyboard Converter
Sum USB keyboard adapter for A1200 - Amedia Computer France SAS