Part 5: How to install an analog plunger in a virtual pinball machine

how to install an analog plunger in a virtual pinball cabinet.how to install an analog plunger in a virtual pinball cabinet.

In many electromechanical pinball machines, the steel ball is shot into the playing field via a “plunger,” a steel rod (shooter) with a spring mechanism. I wanted that for my virtual pinball too- the analog plunger was supposed to control the virtual ball on the screen.

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Virtual Pinball analog plunger Williams/Bally Ball Shooter Assembly
Virtual Pinball analog plunger Williams/Bally Ball Shooter Assembly

The mechanical movement of the plunger has therefore be converted into an electrically usable signal. The solution: A sliding fader that is moved by the plunger and a controller board, which can process the retention of the potentiometer.

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The PinIn1 controller board can process the analog signal of a potential and the setup was pretty straight forward:

The PinAna1 is a bit older, but it offers a KeyBoard emulator, a motion sensor for the "Tilt" function and an input for an analog plunger.
The PinAna1 is a bit older, but it offers a keyboard emulator, a motion sensor for the “tilt” function and an input for an analog plunger (top right).

I used a linear sliding potentiometer (ALPS 10K linear sliding poti mono with 100mm travel) and mounted it on the plunger. A helpful guide for wiring, which can be tricky, can be found here: https://www.flippermarkt.de/community/forum/threads/schiebe-poti-richtig-anschliessen-fuer-analogen-plunger.148714/. When buying a fader, just make sure it has 100mm travel and it is linear.

Analog Plunger and 10kOhm sliding potentiometer
Analog Plunger and 10kOhm Sliding Fader with 100mm travel -test Setup

Analog Plunger setup in virtual pinball

Video of the final setup of my virtual pinball analog plunger with 10kOhm fader.

Having the plunger mounted, now the cabinet “feels” like a real pinball machine. Most table support a virtual plunger. There are, nevertheless some tables (e.g. Bally Star Trek 1979 oder Sons of Anarchy) that rather use a “Launch Ball” button instead of a plunger. Therefore I mapped one of my 4 buttons to the “Enter” key, that will launch the ball in this tables. I just did not want to install another button below the plunger.

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analog plunger from the cabinet’s front.
Demo of the analog plunger in the finished virtual pinball;-)

Next part:
PC system requirements for a virtual pinball and power management…

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