Hi, my name is Charles, I am a 15 years old guy who loves electronics. I own an Arduino Leonardo board, and I got the idea to interface it with a Dymo LetraTag XR label printer that I found for 20 bucks. So here is the main idea:
1-Connect the keypad with the Arduino, 2-Have software to make arduino issue keypresses to the LetraTag (for example: "H E L L O PRINT SHIFT+DELETE") 3-I'll have a little servo to push the blade to cut the paper, but that's not the deal now
Here's my problem: I don't know anything about interfacing matrix keyboard and programming a clock to scan presses and etc.... So, If anyone has done that with a similar keyboard, or anyone that knows the principe and could explain it to me, You are welcome!