(Topic ID: 233424)

Adding Fire alarm bell and smoke geyser mods to my Funhouse.


By wrd1972

3 months ago



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  • 7 posts
  • 4 Pinsiders participating
  • Latest reply 3 months ago by wrd1972
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    #1 3 months ago

    Hello,
    I am preparing to take my Williams Funhouse machine to an expo here soon. And I am going to add a couple new modes to it, to make it really stand out. The idea is to tie these two new features to the knocker solenoid. This means that when a player gets a special, the fire alarm will sound and the smoker will spray upward behind the head, for about 2 seconds or so. Should make a very awesome effect.

    I will be using a pair of these digital timers:
    ebay.com link » Dc 6 30v Digital Led Relay Board Cycle Timing Circuit Switch Timer Delay Trigger

    One timer will be working the alarm (110VAC). And the other will be tied to the manual button on the smoker (likely 12VDC).

    So my question starts with...whats the voltage activating the knocker on Williams Funhouse (WPC)? I am guessing its something higher than 30VDC. So if you notice on the specs for the timer. The timer can be triggered with 6-30VDC.

    I am guessing that I will need to reduce the voltage from the knocker solenoid, that will trigger the timers. So this is my question. Whats the most effective way to do this? Resistors? If yes, what would be the correct size resistor to drop the input voltage to the timers, to around 12VDC or so?

    Thanks

    #2 3 months ago

    Williams just used a big power resistor in their WPC machines that were shipped with a counter, like in my reimported No Fear machine, that ran off the knocker voltage. I'll see if I can make out what value they used on it. But if I had to guess I think it's probably around a 4~5 ohm 8~10W resistor.

    #3 3 months ago

    That would be great. Many thanks.

    #4 3 months ago

    I think the knocker runs off 50V here, but it's activated by grounding it, so you could hook up any voltage really

    #5 3 months ago
    Quoted from zacaj:

    so you could hook up any voltage really

    He should also add a diode to isolate the higher voltage from the timer board.

    #6 3 months ago

    Alright took a look at the counter board in my machine. Couldn't actually see any markings on the resistor, but the I put my meter across it and it measured at 320 ohms.

    20190108_184735 (resized).jpg
    #7 3 months ago
    Quoted from zacaj:

    I think the knocker runs off 50V here, but it's activated by grounding it, so you could hook up any voltage really

    Okay that sounds like the winner here. So I can run 12V positive from the power supply to the positive timer trigger. And the jumper the ground wire to the knocker solenoid, over to the negative timer trigger.

    Does that sound correct?

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