Folks,
Thank you all for your encouragement and kudos. Allow me to work backwards as I go through some of the technology that I developed. First, I am a big fan of Pinscape, as it was the promise of nudge and plunger that got me committed to building a cabinet. The bonus was having digital outputs that are LED Wiz compliant, but it required a series of complicated companion board along side the KL25Z board to make it work. So I designed a mezzanine board that simply plugs into the KL25Z giving it 16 channels of medium current (50mA) enough to drive most LEDs. I have another 3 outputs that are amplified MOSFETS that can drive 2 amp each. Last, all the button inputs have been neatly routed to designated headers along with plunger pot connections and MOSFET output connections. Below is a photo of this PCBA and an image of the raw PCB.
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