This thread has been most helpful
I would just like to share my experience with hooking up a 12v Coin Meter to my I-Pac
I was so paranoid about destroy my I-Pac with 12v
I wired my coin meter up to the I-Pac and so-far so-good, nothing has been fried or failed to work. The coins are being registered on the coin meter and the I-Pac is awarding credits properly. No issues
The I-Pac (with the help of the diodes) are seeing none of the 12v I thought it would be.
I tried separating the ground wires (to limit 12v grounding through the I-Pac and thus the USB port)
1. Coin Meter would ground to the PSU
2. Coin from the I-Pac would also ground to the PSU (by-passing the I-Pac altogether)
Didn't work for me, I-Pac would not register the credit switch.
My thinking being, was the credit switch was still completing a circuit. (Still some things I have yet to understand
)
So wired the whole lot up as per the picture = working!
(The diodes are under the heatshrink, sorry, should have taken the pictures 'before' finishing the connection)
One more thing, that diode across the Coin Meter, install one! Do it! Even if you don't have an I-Pac, it'll save your JAMMA board (or whatever you have it plugged into)
I was just testing the coin meter by tapping the connection on to 12v. Coin Meter would work and count one, but not without a bright spark!
After wiring in that diode, no spark! Beautiful!
The diodes are you friends