(Topic ID: 199666)

System 1 soundboard switch-a-roo.


By Slack_Thompson

1 year ago



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  • Latest reply 1 year ago by swampshroom
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    #3 1 year ago

    Hello,
    Yes, you can very well control the "bip-blup-555" Gottlieb board from a different source.

    This card is very basic, it has three circuit-based oscillators 555, each triggered by the grounding of a pin.
    The three frequencies generated (594 Hz, 266 Hz and 153 Hz) are then mixed and amplified by a LM380.
    555sounds (resized).jpg
    It require a 24 v DC power on pins 9 and 6/7 (GND).

    The tones are activated by grounding one (or more) pin : 1, 2 or 3
    - Connected to ground = tone
    - Not connected = no tone

    The board has been designed to replace directly the xylophone coil controls (similar, activated by grounding).

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