I am using a Pololu DRV8355 dual motor driver. According to the specs, it requires voltage between 1.5V and 11V to operate. I'd like to use two 3V motors with it, and also power an Arduino (Mega 2560) board through it. Since I'm a complete beginner, I am not sure about the input voltage I should provide to the driver. With my limited understanding, I came up with the following possibilities which I don't know how to verify (other than asking here):
- Does the input voltage just need to be anything in the range 1.5-11V - in other words, can the driver adjust the voltage to whatever is needed? If so, would that mean that just two 1.2V batteries would work, and adding more wouldn't help in any way?
- Does the input voltage need to be the maximum of needed voltages - 7V?
- Does the input voltage need to be a sum of required inputs, which would be 3V + 3V + 7-12V? This clearly exceeds the driver's operating range. Would I therefore need to provide 6V to the shield and just power my Arduino directly with another power supply?