Passive Autofire

From Arcade Otaku Wiki
Jump to navigation Jump to search

A cunning little autofire circuit based on a 74HC04 hex inverter that uses the voltage supplied to a button for power. While it does have a miniscule "pause" in fire rate every second or so, it's excellent for use with most games and is incredibly cheap to produce.

Schematic

Passive Autofire Schematic.jpg

Thanks to Yosai for drawing this

Usage

Passive Autofire.jpg
  1. Unplug the GND from a button on your panel
  2. Plug the spade connector from the circuit into the GND wire connector in your harness
  3. Connect either blue wire to the GND on the button
  4. (Optionally) connect the second blue wire to yet another button by disconnecting it's GND

Photos

  • In detail

    In detail

  • 74HC04 IC

    74HC04 IC

  • 100uF 16V capacitor

    100uF 16V capacitor

  • Resistors and potentiometer

    Resistors and potentiometer

  • Clone (by Yosai)

    Clone (by Yosai)

Retrieved from ‘https://wiki.arcadeotaku.com/index.php?title=Passive_Autofire&oldid=6597’