- Published in issue 11/2018 on page 78
Energy-efficient LED Clock
Time, only when you need it
Clocks with LC display without backlighting are difficult to read in twilight and at night even when a room light is switched on. Unfortunately, with a backlight, an LCD uses almost as much power as an LED display. A practical battery-powered wall clock using an LED display can be designed if it only needs to show the time when someone is there to read it… Sounds like a good application for a PIR motion-detector module.