I thought I would drop this topic on the community and see what kind of feedback is available.
I'm very new to electronics. However, I've spent 22 years now in the electrical industry and I'm licensed for 90v-600v. I know how to properly size and construct high-voltage circuitry but I'm not familiar with the Printed Circuit Board world and its many specialized parts.
What I'm trying to do:
1984 Bally Spy Hunter - "S-H-0-T" Target area - lower playfield, right-hand side, under the Eiffel Tower plastic...
Using something similar to:
Derive a 12vdc power supply large enough to power 5 of these "post light leds" wired in parallel.
(tek question: what is the load presented by One of these lights @ 12vdc?)
After proper sizing of the 12vdc power supply, the 12v output should be routed through a relay of some sort.
I'm hoping to use a PCB mounted relay capable of switching the projected load at 12vdc
And I would like to use a nearby playfield lamp circuit (which flashes with certain game functions) as the actuator or control circuit - In other words, I hope to control a relay with the 5vdc playfield lighting circuit.
So to recap:
I'm looking for a PCB mounted relay whose coil voltage is rated at 5v and capable of carrying a 12vdc load at the projected rating of 5 "post leds" - whatever that load turns out to be.
This should be a simple, tiny circuit to build. I just plan on grabbing 120vac on the load side of the on/off switch, run 120vac through a 120vac to 12vdc step-down transformer, switch the load using control voltage supplied by the playfield lamp circuit.
If I'm correct, the only new load I present to the game - and its fuses, circuits, etc. - is the load presented by coil operation. The extra load should just be the coil itself and present a very tiny addition to the overall circuit.
Has this been done? Am I re-inventing the wheel here?
If so, please enlighten me. I really appreciate any guidance you might have.