deskthority

Hello! Recently I got a free IBM terminal from Craigslist that came with a "Bigfoot". I immediately disconnected it from the terminal and went about putting together a USB converter using a Teensy. This is the first time I've done something like this, so I used this guide to do it. I'm confident that I wired it up correctly, I have done and redone it many times now, but when I hook up the keyboard, when I press keys, it will always register a keypress that is either near the key(Such as a press of "u" registering as a press of "y" and "i"), or just not register a keystroke at all. Knowing that the Model F is capacitive, I believe that the problem lies here. I have no idea how I would fix a problem with the capacitance of this keyboard, but I'm sure someone somewhere has had this problem before. Does anybody have any suggestions? Thank you!

In addition, I'm wondering if there is a better place to go for troubleshooting tips. Thank you!

1. Do you o ow for sure what keyboard you have? Model M or Model F?
2. What do you get when you use HID listen?

I'd also check if you slided the backplate all the way into position. If the flippers are somehow misaligned it could also cause extra keystrokes.

zzxx53 wrote: 03 Nov 2020, 04:03 I'd also check if you slided the backplate all the way into position. If the flippers are somehow misaligned it could also cause extra keystrokes.

I thought about this, but it was having this behavior before I disassembled it the first time, and I could tell that it had never been disassembled before

Tbernstein2368 wrote: 03 Nov 2020, 03:42 1. Do you o ow for sure what keyboard you have? Model M or Model F?
2. What do you get when you use HID listen?

It's a Bigfoot Model F, one of the earlier terminal keyboards. HID listen will rapidly scroll with different key inputs when I hit a key. I'm confident the issue is with the keyboard and not with the Teensy