If you tune around the shortwave bands you’ve probably heard various buzzes, high-pitched screeches and other annoying sounds. Many of these aren’t just noise, but amateur radio digital data transmissions. These messages are surprisingly easy it is to decode using free open source software. FLDIGI is a digital modem program for Linux, Free-BSD, OS X, […]
Category Archives: data transfer
Easy infrared UART data link
Here’s an easy way to transfer data with an infrared LED and an infrared remote control demodulator. The example uses an Arduino, but the technique will work with any microcontroller. The transmitting microcontroller powers an IR LED from a pin configured as a 38KHz pulse-width modulator. Another pin configured as a 2400bps UART switches the […]