Capacitive coupling masks real design error

2,528 views · Published 29 September 2012 · 1:53 · Indexed 3 October 2026

Channel: CNLohr · 2012 · Science & Technology

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See the video about this modded nintendo zapper: https://www.youtube.com/watch?v=alBHtmm964E

In the development of my color-gun nintendo zapper mod, my trigger appeared to work, but seemed faulty, like the switch was bad.  When I clicked, it would only hold down momentarily.  Little did I know the bug was far stranger.

I was, in software looking at an adjacent pin.  It made me believe all was well because it was capacitively coupled to the right pin, when in fact the design was completely wrong.

The fix was as simple as changing the pin in firmware.

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