Servos and DC motors have been used a lot in this tutorial, as most robots will have servos, motors, or both installed. There may be times that using many servos or very heavy duty ones directly off the EZ-B may not be feasible due to power requirements.
So putting a lot of what has been talked about in this tutorial together, such as "current", "voltage", "power supplies", and "series/parallel", we can find a more efficient of powering them. A good way to power these servos and DC motors, is to power them directly from the "power source". That could be the same source that's powering the EZ-B (parallel) providing the motors and devices connected to the EZ-B use the same "voltage". This way, depending on the power supply specifications, they will get all the "current" they need to operate at optimum efficiency. You could also use a separate power source and power the motors or servos from that.
So, we started with amps then voltage, then everything else that which these power variables are used with...
EZ-B pins that deliver the power,
Batteries and mains supplies that deliver the power,
Series/Parallel which is how this power is distributed,
Multi-meters to measure the power,
Regulation to reduce or increase the power,
and the Wire that transports the power.
Lots of subjects that all interconnect. Hopefully from reading through this tutorial, you will see that there is a lot information to take in for getting the right power requirements for your robotic projects. But if you take each of the above steps one at a time, you will soon be able to understand what is needed, and hopefully avoid any mishaps.
Isn't electricity a weird and wonderful thing!
Tutorial created on 11th October 2015.