Hello everyone, thank you for taking the time to look at my project.
I am attempting to sense "pinball events" which include hitting switches, contacting the pop bumpers, triggering the flippers etc on an older Electro-Mechanical pinball machine made in the 1970s by Gottlieb. I have attached an excerpt of the schematic below, which shows several of the pinball components and the way they are wired up. Labeling outside of this photograph shows that there is 25 VAC running across these components in parallel.
I have built the circuit below, replacing the diode array with a GBL005 Bridge rectifier, the power entering the Bridge Rectifier is 25 VAC, and I have left off the fuse. I am planning to use the dedicated 5V to trigger an Arduino's I/O pin, and am using a 10k Ohm resistor in parallel before the I/O pin just like in the basic Arduino button example. With a single circuit I have been able to measure individual pinball events around the machine including the flippers, pop bumpers, switches etc.
When I go to add a second of the above circuit arrangement, I am getting false I/O positives in that one pinball event will trigger both or all I/O pins attached to the pinball circuit. I have tried placing my circuit in parallel with the relays, with the NO switches, and in series before the switch. I figured that it was now time to call in the experts so any help / advice or even questions requesting clarification are welcome.
Thank you
I am attempting to sense "pinball events" which include hitting switches, contacting the pop bumpers, triggering the flippers etc on an older Electro-Mechanical pinball machine made in the 1970s by Gottlieb. I have attached an excerpt of the schematic below, which shows several of the pinball components and the way they are wired up. Labeling outside of this photograph shows that there is 25 VAC running across these components in parallel.
I have built the circuit below, replacing the diode array with a GBL005 Bridge rectifier, the power entering the Bridge Rectifier is 25 VAC, and I have left off the fuse. I am planning to use the dedicated 5V to trigger an Arduino's I/O pin, and am using a 10k Ohm resistor in parallel before the I/O pin just like in the basic Arduino button example. With a single circuit I have been able to measure individual pinball events around the machine including the flippers, pop bumpers, switches etc.
When I go to add a second of the above circuit arrangement, I am getting false I/O positives in that one pinball event will trigger both or all I/O pins attached to the pinball circuit. I have tried placing my circuit in parallel with the relays, with the NO switches, and in series before the switch. I figured that it was now time to call in the experts so any help / advice or even questions requesting clarification are welcome.
Thank you