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OptI-PAC | Installing | D.I.Y Optical Sensor | OptI-Pac F.A.Q


The Opti-PAC (Optical Interface for Pc to Arcade Controls) is an interface for easily connecting optical-type arcade control devices including trackballs and spinners to a PC for use with emulators such as MAME.

Opti-PAC.

Features:
  • One USB cable handles up to two trackballs and 4 spinners/rotary joysticks.
  • No external power needed.
  • The active control (trackball or rotary) is automatically selected.
  • Supports buffered controls (Happ, Ultimarc U-Trak) or unbuffered (Suzo, Wico, Ultimarc 2 1/4), high or low polarity.
  • Configurable via software utility for active high/active low.
  • Full-Speed USB Interface. 16 Bit data.
  • Will work alongside PS/2 or USB mouse if required.

    Optical Controls Technical Info:
    A one-axis optical control such as a spinner has one LED which shines across a spoked wheel onto two sensors.
    The two sensor outputs are compared with each other to generate movement direction.

    Therefore the interface requires two parts:
    A voltage supply for the LED.
    Inputs for the two sensors.
    The OPTI-PAC has voltage outputs for the LED and the 2 inputs for the two sensors. It takes all voltage needed from the USB port.

    A dual-axis device such as a trackball has all the above multiplied by two. Two LEDs, two pairs of sensors. So the board has two independent circuits for the X and Y directions. These two circuits can either be used on the same dual-axis device or separate single-axis spinners.


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