How does GPS determine your location? The Global Positioning System (GPS) uses radio signals transmitted by satellites orbiting Earth. A GPS receiver, such as the one inside a smartphone or satellite-navigation device, measures how long those signals take to arrive and uses that information to calculate its position. GPS can work almost anywhere in the…

How does Bluetooth work? Bluetooth is a wireless communication technology that allows nearby electronic devices to exchange information using short-range radio signals. Instead of connecting through a cable, compatible devices transmit digital data across the 2.4 GHz radio frequency band, enabling functions such as wireless audio, keyboards, computer accessories and communication between electronic sensors. Bluetooth…

How do QR codes work? A QR code is a two-dimensional pattern of small squares that stores information in a form a camera or specialised scanner can recognise. The device analyses the pattern, decodes the information and then offers an appropriate action, such as opening a website, displaying text or connecting to a wireless network….