Search the Community
Showing results for tags 'battery backup'.
Found 1 result
Found this through hackaday. Sunrise Alarm Clock. Uses a G2553 (Programmed via Launchpad) Uses a DFC-77 Atomic Radiowave Time Receiver for, well, atomic time. Standard Character LCD (via a shift register) (and pwmed backlight) Settings through Pushbuttons Simple Alarm via PWM melody. 10mm LEDS to provide Sunlight (These could/should be replaced with high current 1a/3a type leds imho) And battery backup (with backup status recognition on p1.4 interrupt) via three diodes! A full featured project, though it could use better leds, and unless you are in Europe, a different clock (either standalone rtc, or a regional radio clock source WWV or WWVB in US though I can't find a source for modules) And a complete schematic would be nice (I think they mislabeled which regulator they use, since they have 5v in on a 7805 regulator (5v out), connected to the g2553) http://renaud.schleck.free.fr/reveil.php