I want to make sure I properly understand the power requirements for my proposed setup before I start purchasing parts and batteries.
In the motor shield user manual (http://www.ladyada.net/make/mshield/use.html
) it is stated that the driver chips are designed for 600ma per motor
, which to me indicates that the motors are wired in parallel. So, if I wanted to power four 6v DC motors with free-running currents of 70mA, I would need enough battery capacity to account for the sum of these currents, right? That is, if all four motors run with little or no resistance then I will be drawing 280ma from the batteries. So using four 1.5v alkaline batteries, which are rated at 2400mAh, should give me a rough battery life of around 8.5 hours, or a little less because the motors will rarely run with no resistance. Is this correct, or am I missing something important in my understanding?
Also, how do I incorporate the stall currents of the motors... if the motors have stall currents of 700mA, how does this factor into determining the battery requirements?
Thanks in advance for any help!