There are 3 repositories under amiga-hardware topic.
A314 is a family of expansions for Amiga computers that lets a Raspberry Pi (RPi) be used as a co-processor to the Amiga
4/8 MB Fast RAM Expansion for the Commodore Amiga 500
An open source flicker fixer for Amiga 500/2000
Playstation to Commodore Amiga/CD32 Controller Adapter
Open Hardware 1 MB Chip RAM Expansion for the Commodore Amiga 600 Computer
Mechanical keyboard for Amiga 500 and 1200, using Cherry MX compatible switches.
SPI adapter that connects to the parallel port of an Amiga
A PCB build of Rob Smiths Amiga DrawBridge, an Arduino-based solution for reading and writing Amiga floppy disks on modern hardware. Also includes a version of Greaseweazle.
Verilog code to replace the Commodore SDMAC found in the A3000
4 MB Fast RAM Expansion for the Commodore Amiga 600
A 1MB chip RAM expansion for the A500+
Move your Amiga 2000 CPU to the Coprocessor slot!
Open Hardware Automatic Mouse/Joystick Switcher for Amiga Computers
Motorola 68040 to 68060 adapter
Amiga 4091 hardware - Gerbers, Schematics, EasyEDA files, etc
Allows use of regular EPROMS on Amiga 500 Rev 5 boards
Connect up to four joysticks to your Amiga!
Network interface & SD card reader for Classic Amigas
Amiga 600 with Gayle 1: VHDL implementation of PAL16L8B (XU1) with Lattice GAL16V8
An Arduino based adapter to use a PS/2 mouse with your Amiga.
A simple circuit to allow merging stereo input channels
Replace the old 44256 DRAM chips on your A500 with newer SRAM memory
A neat RTC for Commodore Amiga 500 and 1000 which fits under the M68k CPU.
Amiga mouse emulation library for arduino/platformio
This Arduino sketch converts an original Amiga 500 keyboard into a USB HID, allowing it to function as a modern USB keyboard. The sketch reads the Amiga 500 keyboard signals and translates them into USB keystrokes, preserving the vintage feel with modern compatibility.
All info needed to build RPi 4b into an Amiga 500 case without any case mods.