Hello everyone,
I am currently trying to make a robot with arms, legs, fingers etc, and I have a bit of a problem figuring out what battery I need for my robot. Before I continue I think I should mention that even though I’ve created a few simple robots in the past I am still a newbie and this project is the hardest I’ve tried to undertake so please forgive me if what I am asking here seems pretty obvious or dumb.
I will be using a Raspberry Pi 2 and two Adafruit Pi hat servo controllers stacked on top of the Pi. Each servo controller can drive up to 16 servos, therefore, giving me the ability to use up to 32 servos. My intention is to use 16-18 Tower Pro MG995 servos and 8 SG90s, so that gives us a total of 24-26 servos. The Adafruit sheet for the servo controllers suggests for powering each board/hat, the following:
]
Good power choices are:/:m]
]
5v 2A switching power supply
(up to perhaps 4 servos)/:m]
]
5v 4A switching power supplies
(up to perhaps 8 servos)/:m]
]
5v 10A switching power supply
(up to perhaps 16 servos)/:m]
*]
4xAA Battery Holder
- 6v with Alkaline cells. 4.8v with NiMH
rechargeable cells, portable!/*:m]
*]
4.8 or 6v Rechargeable RC battery packs
/*:m]Of course, I want the robot to be portable and not restricted to the length of a cable mounted to the wall, so I will need some sort of a rechargeable battery pack. What I am guessing from the adafruit sheet is that I need a battery pack with voltage between 4.8v- 6v and current up to 10A. I would much appreciate it someone could recommend me a battery for this robot, as well as if I could make some kind of configuration to power both adafruit servo controllers with one battery instead of one for each board. I should also mention that the Pi itself is powered by a 10000mAh powerbank.
LINK TO ADAFRUIT SERVO HAT SHEET: cdn-learn.adafruit.com/downloads/pdf/adafruit-16-channel-pwm-servo-hat-for-raspberry-pi.pdf