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(Topic ID: 270994)

does anyone have the ability to modify a williams rom?

By j_m_

4 months ago

Topic Stats

  • 6 posts
  • 3 Pinsiders participating
  • Latest reply 4 months ago by Coyote
  • No one calls this topic a favorite


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    #1 4 months ago

    I was wondering if anyone here on pinside has the know how to take an existing .bin file and make a slight change to the way the lighting works.

    I'm interested in taking a feature where the bulb flashes on/off when active to just turning it on while that mode is active and would be willing to pay someone for their time for a one-off project that I'm working on.

    #2 4 months ago

    Is that all you need changed?

    Someone familiar with PinMAME might know what to do.

    Myself, I'd try a hardware solution, have the bulb signal feed a timer circuit that keeps the bulb lit as long as the input keeps "flashing." AKA a monostable multivibrator.

    #3 4 months ago

    the purpose for changing the light from blinking was to make it easier for me to trigger something else that I want to use in place of the bulb.

    basically, I'm looking to replace the little pc boards currently housing the incandescent bulbs.

    #4 4 months ago

    The problem is that even if you changed how the bulb was 'lit', it would still be 'flashing' (pulsing) as far as a digital circuit would see - since lamps are *pulsed* on and off at a high frequency.

    #5 4 months ago

    so, it sounds like my best bet is just to code and accommodate for the flashing bulbs

    my original thought was given that I can check for a "light on" scenario at least 10x a second, as long as I am able to detect a high (lit) value every second, treat it as the bulb is on (eg. flashing)

    the only thing that I need to follow up on is whether or not multiple bulbs can flash on the same board at the same time during game play

    #6 4 months ago

    I'm no expert, and maybe a more circuit-oriented person can comment, but perhaps a mix of some kind of voltage gate with a capacitor would help with the 'pulsing'. If so, then you could - in theory, take 'x' number of readings per second, and assuming that if half of the readings are on, then you could tell the lamp flashing..?

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