I have chosen a winner to receive the second NES to N64 adapter I created for my last video. If the winner would send me a direct message of where they want me to send the adapter I will send it soon.
I also included the ino file if you wanted to try and create your own. I created my using an Arduino Nano. An Arduino UNO should work too.
To wire it, you need to connect the N64 data wire to pin D2.
For the NES pins, you need to connect these as followshttps://psmay.com/wp-content/uploads/2011/10/nes-controller-pinout-300x200.png
D1 from the NES goes to A0
CUP to A1
OUT 0 to A2
You will also need to connect the ground for both the NES and the N64 to ground on the arduino. The 5V out from the arduino should connect to VCC of the NES controller.
If you want to power the device from the N64 instead of the USB port you will need to buy a boost converterhttps://www.amazon.com/gp/product/B07L76KLRY/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1And use that to convert the 3.3v from the N64 to 5V needed by the arduino. I used a 330uf capaciter between the 3.3 input voltage and ground to smooth out the voltage from the boost converter.