A while back, Logitech introduced their version of a wireless interface for keyboards, mice, and other human-oriented peripherals. Yes, they could have used Bluetooth, but that’s neither here nor there. What we do know, though, is that it’s now possible to stuff one of these Logitech transmitters into a Super Nintendo controller, allowing it to operate with your fancy-schmancy wireless keyboards and mice.
[Warrior_Rocker] wanted to retain as much of the stock appearance of the original controller as possible. To do this, he salvaged the Logitech transmitter from an old handheld Logitech keyboard/touchpad combo. The membrane of the keyboard connected directly to the transmitter, meaning tracing out the connections of the membrane to each pin was required to get a button mapping that made sense.
Once the lines of the SNES controller were wired up to the transmitter, [Warrior] needed a way to power his new wireless controller. The old keyboard used a pair of AA cells wired in parallel. With two AA cells, the keyboard had about a year of battery life, so with a single AAA cell, [Warrior]’s SNES controller should last a few months or more.
Except for a switch and a missing cable, [Warrior]’s wireless controller looks exactly like a stock controller. Pretty impressive, given this build is the product of stuff he just had lying around.