Hello everyone.

I am new to pinball but do dabble with electronics as a hobby. However, I am a bit gun-shy with this project because of how expensive these things are. I recently purchased a new Stern Star trek and Ghostbusters machine. All I want to do is add a little bit of color.

So... on Star Trek, the existing enterprise ship has three blue LEDS. I wanted to add two green LEDs somewhere else and I wanted them to be always on... just like the Enterprise LEDS. So I thought it'd be a good connection point.

However, I can't figure out the current limiting component of the circuit. I added a green LED lamp in parallel with those lights and the blue lights turned off and green lamp was on half brightness. With the blue LEDs unplugged, the green lamp illuminated correctly.

So am I to understand that none of these lamps have a current limiting resistor? Ordinarily, I'd just size a resistor for 3 blue LEDs in series (which is what I thought they did) and then splice into that feed with a parallel circuit with a correctly sized resistor for the green LEDs. But now I'm wondering if the current circuit will play nice with this approach.

Given that these will be always on, maybe I should find another power tap elsewhere?

Any help would be greatly appreciated.

Thank you,
Joe