QR codes–square, dot-matrix variants of the venerable UPC–are becoming an increasingly popular way to share information such as URLs, contact details, GPS coordinates, and calendar events. The idea is ...

Software built into the cameras on iPhones and Android phones make quick work of decoding QR codes. How do you do that on a laptop or desktop computer?

Convolutional codes represent a cornerstone in modern communications, offering a method for continuously encoding data streams to mitigate errors due to interference and noise. These codes operate by ...

Quantum computers promise to solve problems that overwhelm classical machines, but their most stubborn obstacle is noise that scrambles fragile quantum states before any useful answer emerges. A new ...

Here’s the front-end circuit of the IR sniffer. The hardware will capture an IR code and retransmit it on demand. The schematic isn’t particularly complex. The IR receiver module is represented here ...

While efforts in Europe focused on Enigma, the outcome of the Pacific War hinged on intercepting and breaking Japanese naval ...

Morse code encodes a simple text into a sequence of dots, dashes/dits, and spaces. It is one of the earliest methods used to transmit messages in the form of audible or visual signals. The Morse code ...