BATTERY BACKUP with charging (will not trigger arduino reset)

Projects Discussion and Showcase Product Design
9

Rethinking this:

  1. Considering that without the mq-2 sensor and the lcd backlight and all relays disconnected my current draw is 50mA I can definitely use 12v 4ah batteries.. and achieve the 5-6 or more hours battery on time. Because the lcd with backlight on "looks cool" (hee hee) doesnt justify its usage on power off.

  2. With a solar charger this could run on batteries indefinitely..

  3. So.. on power off -> disconnect mq-2, lcd backlight, all relays

UPDATE: 7/11

Eureka! Just survived a real life power outage! Power came on and off 4 times, then stayed off for 55 minutes. Power is now back on and my clock has maintained time, and my arduino did not reset.

IT TAKES A LICKIN.. AND KEEPS ON TICKIN BABY! hee hee :fearful: