Adaptor to make your Iambic Paddle a USB keyboard input
Full credit for the design on this goes to these guys: https://www.nycresistor.com/2012/02/20/morse-code-keyboard/
But everytime I get asked about it, I have to go hunt this page down, so I'm consilidating my notes here.
You can see my comment on the bottom of the page where I detail the very minor touch ups I've done here.
I hope this helps somebody in the future that wants to build this little guy. Its a fantastic toy and really makes practice easy.
I ordered a Teensy 2.0 off of amazon fairly easy enough. The code loaded on much like any other Arduino software would load. Its a quite elegant design that uses some pins for input, some pins for speaker output and re-uses the USB port to connect to the computer. I took a few extra steps and put a 1/8in stereo jack on it and dropped the works into a case for the earbuds that came with a samsung phone of mine.
Edit iambic.c to set key speed
make and then open the Teensy Loader and plugin your Teensy and download the .hex file.
After that, plug into your USB port, plug in your Paddle and get to keying!
Paddle gets connected to B4, B5 and GND pins. B4 is dit, B5 is dah - swap if that's your thing.
Speaker gets plugged into VCC and pin OC0A which was labled B7 on the board. It was labeled as OC0A in the Teensy docs.
Video link here:
#1 https://youtu.be/SAqfvn5xvzI - Overview #2 https://youtu.be/dA1FuITq8fY - How to modify, build, upload code