use two diodes one to power from vdd and one to power from Batt via 1K to feed RTC. (Or gate)
Picbuster
Just 12 posts up. And on the same page too.
https://forum.allaboutcircuits.com/threads/batttery-backup-of-the-rtcc.141621/#post-1195072
use two diodes one to power from vdd and one to power from Batt via 1K to feed RTC. (Or gate)
Picbuster
| Thread starter | Similar threads | Forum | Replies | Date |
|---|---|---|---|---|
|
|
My external backup storage died today. | Digital Design | 22 | |
| J | LiPO Power Charging and Power Supply | General Electronics Chat | 4 | |
| S | Circuit design for battery backup | General Electronics Chat | 10 | |
|
|
PC Power Backup Design. | General Electronics Chat | 28 | |
|
|
LEDS controlled with raspberry pi 3 and external batttery | Microcontrollers | 13 |