I have a requirement to retain memory in an Arduino while AC power is not availeble (for about few minutes). I am expecting to use a 3.6V memory battery. How can I use it with Arduino Uno ? or ATmega328P.
Can I use a Super Capacitor instead ? If so How can I interface. I can power off most of the functions in Uno.
What would be the ideal solution if I need to power up a Bluetooth module (HC06) too.
Your kind help is much appreciated.