I have some questions:
First of all i have 4 GM2 gearmotors from solarbotics 2 for each side of the robot (left/right) each motor consumes 52 mA free running at 5V. That means all together its 208 mA. But im running them at around 10v, so they consume 416 mA now. Also, im replacing the DC motors in the gearbox with better motors provided by solar botics, these new motors apparently consume 4x the power of the previous ones
So if i assume P = I*V and the voltage is constant, then 4P = 4I*V? which means free running the motors will consume 416*4 = 1.6 Amps?
If the motors stall, they consume 600mA each (at 5v with the old motors) which translates to 19.2 Amps at stall total. Now i dont plan to run into anywalls or anything with my robot, its for a comepetition where i have to put stuff up in my box
1. did i calculate my current draw correctly? lol
i dont wanna have to pay $50 for a motor controller that can support 20Amps for a few seconds.
I want a dual motor controller that can continuously support 2Amps (or 5 considering the load/weight on the chasis) i guess... but i want it to just be an IC, which is only about $6 max.
2. Is that a dangerous choice? What if i put a heaksink on the IC for the rare occasion that my motors draw more than 2 Amps? will this work