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 ...

Last time, we looked into using a logic analyzer to decode SPI signals of LCD displays, which can help us reuse LCD screens from proprietary systems, or port LCD driver code from one platform to ...

[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 ...