Inspired by this
, I decided to build a morse transmitter and add some cool features to it.
This project show how to build a little morse transmitter using an MSP430G2231 MCU.
The device can transmit in two modes:
- serial, getting the characters from a COM port and translating them into morse code;
- manual, using the key switch.
In serial mode, one character at a time is read from the COM port and transmitted as morse at 15 WPM. To better understand how morse code works, read this
Morse keying is achieved toggling an output pin connected to the oscillator power pin, thus getting a pure CW mode.
The device is powered with 2xAA batteries, and the power consumption is kept to a minimum thanks to the Low Power Mode when not transmitting. You may add a second 4xAA supply for the octal buffer in order to increase RF power.