KEY2USB
About the KEY2USB PCB
KEY2USB is an open source PCB design by acwright, published on GitHub under the CERN-OHL-P-2.0 license. It is a 2-layer board measuring 57.9 × 83.9 mm, with 9 components from 8 distinct parts.
Other key parts include the 28C64, 74LS32, 74LS273 and 74LS74. By type, the board carries 4 ICs, 3 connectors and 2 diodes.
It belongs with the retro computing and keyboards designs in this gallery.
From the project
Commodore 64 / C128 expansion port cartridge to USB HID keyboard
A non-invasive Commodore 64 expansion port cartridge that lets the machine's own physical keyboard act as a USB HID keyboard for a connected PC running the VICE emulator. Plug it in, power on the C64, connect a USB cable — no case modification, no soldering into the keyboard.
- Overview - Compatibility - Quick Start - Architecture - Mode Jumper - Hardware - KEY2USB Board - Revision History - Firmware - VICE Setup - Joysticks - Verifying your setup - VIC-20 (xvic) - Software - CAD - Production - Schematics - Libraries - Bill of Materials - Purchase - License
Main components on the KEY2USB
KEY2USB bill of materials (BOM)
9 components, 8 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 28C64 | DIP-28_W15.24mm_Socket_LongPads | U1 |
| 1 | 74LS32 | DIP-14_W7.62mm_Socket_LongPads | U2 |
| 1 | 74LS273 | DIP-20_W7.62mm_Socket_LongPads | U3 |
| 1 | 74LS74 | DIP-14_W7.62mm_Socket_LongPads | U4 |
| 1 | MODE | PinHeader_1x03_P2.54mm_Horizontal | J1 |
| 1 | C64 EXP PORT | C64_EXPANSION_PORT | J2 |
| 1 | USB | UJ2-BH-BL1-TH | J3 |
| 2 | 1N5227B | D_DO-35_SOD27_P10.16mm_Horizontal | D1, D2 |
KEY2USB design files
The KiCad project lives in the acwright/KEY2USB repository on GitHub; these links point at the commit this page was built from.
- LayoutHardware/KEY2USB.kicad_pcb
- SchematicHardware/KEY2USB.kicad_sch
KEY2USB: common questions
How big is the KEY2USB PCB?
The KEY2USB measures 57.9 × 83.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the KEY2USB?
9 components, from 8 distinct parts. The full bill of materials is listed on this page.
Where can I download the KEY2USB design files?
From the acwright/KEY2USB repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the KEY2USB design in my own project?
Yes, under the terms of its CERN-OHL-P-2.0 license, which acwright chose for the repository.
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