(Topic ID: 290412)

Space Invaders Top EOS Normally Open

By rotormoshun

3 years ago

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Latest reply 3 years ago by rotormoshun
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Space Invaders Bally, 1980

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So I understand all the normally closed and normally open EOS's on the main (bottom) flippers, and I understand the top flipper normally closed and what is it used for.

But I am at a loss of what the second normally open EOS is used for on the SECOND (top) flipper. (Space Invaders has a normally open EOS on top flipper even though pictures doesn't show it.)

Anyone care to shed some light on its purpose?

See attached pic for diagram (except it doesn't show the normally open on the top flipper)
bally_dual_flippers_eos (resized).jpg

That switch is part of the switch matrix and the game uses it to trigger the flipper laser sound effect:

https://pinside.com/pinball/forum/topic/original-diodes-on-early-bally-solid-states#post-6083768

Thank you, now I know!

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