File:Commodore 64 - Joystickports, EinAus-Schalter, Poweranschluss.jpg - Wikimedia Commons
Build your own Commodore 64 arcade stick - a guide - Retro Games Collector
Connectors Commodore 64 – My old computer
commodore 64 - Would a multi button controller have been possible on the C64? - Retrocomputing Stack Exchange
ESD Protection for the C64 Control Ports | hackup.net
Reading C64 Joysticks and Analog Signals (Programming Electronics with the Commodore 64 Part 3) - Retro Game Coders
Connectors Commodore 64 – My old computer
Control Port - C64-Wiki
C64 Joystick Adapter - Share Project - PCBWay
C-64 Workshop / Pin Connections
4 players adapter for Commodore 64 - Share Project - PCBWay
DAVES OLD COMPUTERS - Commodore 64
Building a Paddle for Arkanoid, for the Commodore 64 - Valiant EN
Made an ESD protector for joystick ports : r/c64
Commodore 64 User Port Project Development PCB - Share Project - PCBWay
![Commodore Info Page - Articles: C64 - DTV2 with IEC, keyboard and joysticks [en]](https://www.commodore-info.com/foto/th_computer_c64_dtv2_14.gif "Commodore Info Page - Articles: C64 - DTV2 with IEC, keyboard and joysticks [en]")
Commodore Info Page - Articles: C64 - DTV2 with IEC, keyboard and joysticks [en]
Atari joystick port - Wikipedia
The Keypad Joypad - Amiga, Atari, C64... | Hackaday.io
Converting the “Competition Pro Extra USB” to C64/Amiga/Atari DB9 – pagetable.com
Connectors Commodore 64 – My old computer
Retro Isle - C64/128 Technical Section
![Homebrew C64 "Paddle" Box : 4 Steps - Instructables](https://content.instructables.com/FUG/BYFZ/FGY0OSQ5/FUGBYFZFGY0OSQ5.jpg?auto=webp&frame=1&width=320&md=ec49c266fa18ffc9d5261d5388a399d9 "Homebrew C64 "Paddle" Box : 4 Steps - Instructables")
Homebrew C64 "Paddle" Box : 4 Steps - Instructables
Tezza's Classic Computers Articles and Projects - Blowing up and then fixing a Commodore 64
USB Joystick Adapters – breadbox64.com
