Let me say hello to everybody here before I start explaining my doubts!
Here we go, I'm currently making an Arduino project with a HC-06 Bluetooth module, 2 LEDs, a Pulse Sensor and an Arduino Pro Mini. My problem is that I really don't know what's the best power supply for this circuit. I was wondering if I connect a pair of CR2032 batteries would be the best way, but I don't know really. Circuit is 3.3v, and each CR2032 battery gives 3v, so I don't know if I can use the circuit with those batteries.
What do you recommend me? I need a power supply small and lighter.
Thanks a lot.