Mike sends us this HOWTO for turning an Atari joystick into an Atari noisemaker:
Information and schematic diagram on how to build a unit that generates all of our favourite sounds of the Atari computer games era. Squelchy, sawtoothy popie growls.
Once you put it together you have a couple of potentiometer knobs that you 'twiddle' and 'tune' to get that ultimate sound.
(Thanks, Mike!)