CWVox Converts “Dah” and “Dit” Speech Into Morse Code with an Arduino

Every project these days that involves detecting speech seems built around complicated algorithms: machine learning, pattern matching, and spectrum analysis — to name a few. However, amateur radio operator Kevin Loughin (AKA KB9RLW) created CWVox, a voiced-activated keyer that converts the spoken “dits” and “dahs” into morse code using only an Arduino Nano’s ADC!

Morse code, also sometimes called just “CW,” is coded symbols (or words) that consist of short and long tones. When written, the short burst is a dot, and the long burst is a dash.

A keyer is a device that creates the short and long tones most people associate with Morse code. Generally, these devices have paddles that the user actuates with their fingers. So, what happens when you cannot use your fingers and, therefore, a keyer? This roadblock is where CWVox comes in.

Radio operators that know Morse code already speak the tones with the words “Dit” (short) and “Dah” (long.) As it turns out, the length of saying these words is slightly different, and that difference is all you need for simple yet practical word detection. At least, when you only care about two words!

Read more – Hackster: