[Rostislav Persion] wrote a simple Morse Code decoder to run on his Arduino and display the text on an LCD shield. This is probably the simplest decoder possible, and thus its logic is pretty ...

Morse code is used in telecommunication; it is a method of transmitting and receiving coded information. Each character (letter or numeral) is coded/represented by a unique sequence of dots and dashes ...

If you're not familiar with QR (Quick Response) codes, they are mobile barcodes that you can encode with different types of information, and then use a smartphone camera, and QR code reader app -- ...