Joystick Tester A600 but make sure that it

but make sure that it specifically lists 12V

The Greaseweazle board and cables are available as separate listings or add-ons

It only conveys +5V DC and 9V AC power

and the total time of operation (stored in internal non-volatile memory)

C64 PSU OLED Digital Gray EU - Declaration of Conformity

Joystick Tester A600 but make sure that itTest the functionality of your vintage C64 Amiga style joystick Use the Joystick Tester to test if your vintage joystick works without plugging it into your vintage computer. Will tell you whether all four directions (up, down, left right) as well as the fire button works, and it comes with a switch to optionally feed the joystick with 5V. Power the tester with a normal mini USB lead, or connect your own battery or similar to the provided solder pads.