Looking for help on best power solution for my rover. I’ve always struggled with understanding volts, amps, capacity and all the calculations etc.
The rover has:
Rasp Pi v3b with camera 5v from battery, ~1000ma
4x DC work gear motors 20RPM 12v from battery, max 500ma each = 2000ma
2x HC-SR04 ultrasonic sensors 5v from GPIO, 15ma each = 30ma
2x 128×64 OLED monochrome displays 3v from GPIO, 25ma each = 50ma
1x IR avoidance sensor 3v from GPIO, 20ma
1x L298N motor driver board 5v from GPIO, 2000ma
5x WS2812 LED bars (40 LEDs total) 5v from battery, 50ma each = 2000ma
Total is 7100ma.
At the moment I have a 11.1v 2200mah Lipo powering everything but the LEDs using 5v bucks to step down where required. And a set of 4AA batteries for the LEDs with a 5v buck to step down.
I usually only operate it for 5-10 minutes at a time, with driving for a few of these minutes. Would like to do this 5-10 times between charges or swapping out the batteries.
So my ultimate questions are:
Is my power solution at the moment adequate?
Can I replace everything with a 12v 7200mah SLA battery? Like this one.
Is my logic above correct?