Turbocharging NES Controllers: A 3‑Button Mod
Add a third fire button to your classic NES pad without breaking the original feel.
A simple solder‑on mod can give you the edge you need for modern speedruns.
What happened
We took a stock NES controller, opened it up, and installed a tiny tactile switch alongside the existing A and B buttons. The mod uses the controller’s existing wiring and a spare pin on the connector, keeping the original ergonomics intact. After a quick test on Super Mario Bros., the new button responded instantly.
Why it matters
Speedrunners rely on precision and comfort; an extra button lets you execute complex combos without thumb gymnastics. Collectors also appreciate mods that preserve the console’s aesthetic while adding functionality. This tweak bridges nostalgia with competitive play, extending the life of the hardware.
How to think about it
Plan the layout before you cut—measure where the new switch will sit to avoid interfering with the original pads. Use a thin, heat‑shrink tube to insulate solder joints and keep the controller’s silhouette unchanged. Test the wiring on a breadboard or spare controller first to avoid frying the port.
- Cheap and reversible
- Keeps original look
- Instant input boost
- Requires soldering skill
- Adds a tiny weight
- Potential warranty void
Make sure the new switch’s voltage rating matches the NES controller’s 5 V supply to avoid damaging the console.
FAQ
Do I need a special screwdriver?
A standard #1 Phillips works fine for the NES case screws.
Can I use any tactile switch?
Choose a 6 mm low‑profile switch rated for 5 V and around 50 mN actuation force.
Will this mod affect controller latency?
No, the added switch introduces negligible delay—well under a millisecond.
Sources
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