Roomba Virtual Barrier

Roomba virtual wall box using Arduino UNO. (Note the photo has an old slit layout that I changed in the model)

Parts needed:
1 x Arduino UNO or clone
1 x 5mm diameter IR LED
1 x 680ohm resistor (or whatever works with the LED you pick)
8 x M3 x 6mm machine screws with hex heads (you should be able to replace with similar imperial sized screws if needed). Lengths are only important for Arduino mounting holes as they have limited depth.

"Circuit":
Digital Pin 3 --- Resistor --- LED --- Ground Pin

For the electronics portion, I used the code and wiring from Eric's YT video and links (I attach the script here for convenience, it's fully his work though).

The code, video and his full project details can be found here:
https://github.com/MKme/Roomba