Kyle Wadsten has released his interface boards for the Model 3 and 4 that allow plugging in modern keyboards into the classic TRS-80 Model 3 & 4 machines.
There are two different board designs, one for USB keyboards and another for PS/2 input.
What I find very intriguing and helpful is the ability to use the existing keyboard along with a modern keyboard at the same time.
Check out more at his order page or on the Facebook announcement page at the links below:
Kyle Wadsten’s NEWKEY/80 Arduino and custom board allow for a modern keyboards on your Model 3 & IV machines.