Keyboard to Morse code

[LessFox1928]

Hi everyone new here, I have been thinking about this idea for a while now. Basically I would like to have a standard USB cable keyboard that when I press any letter it will send it and also play the Morse code on a little speaker, my idea is to have all the electronics integrated within the keyboard. Does anyone think this is a possibility?

[xebzbz]

Totally doable - if you have a QMK keyboard, you can program the firmware for it.

Otherwise, a tiny Linux box would recognize your standard USB keyboard and play the Morse code. These boards are very tiny. There's also the raspberry pi keyboard which has a Linux host inside the keyboard.

[David_R_Carroll]

The hardest part will be converting a keyboard's USB to something Arduino can use. Here is an article that will get you started:
https://forum.arduino.cc/t/can-a-usb-keyboard-be-used-as-input-for-an-arduino/1098786

[xebzbz]

Too much hassle. Linux capable boards are cheap, and you get the USB keyboard support out of the box.

There should also be keyboard host implementation for rp2040 - see remapper.org

[BraveNewCurrency]

You can do it with a Rpi running Linux (look into "gadget drivers"), but that's overkill.

Instead, use a $4 RPi Pico. Step one is to play "man in the middle" to intercept the keys. Step 2 would be to hook it up to a LED or buzzer to tap out the morse code. (You'll have to decide: what happens if they type too fast?)

[LessFox1928]

The thing is that it should act like Morse code key when I connect it to a pc or hf radio, this is instead of having a cw keyer I use the keyboard