I could use some perspective on a circuit I'm planning to build. It's a robot with 6 standard servomechanisms and 4 microservos. I'm set on using a single power source and three step-down converters to feed most of the servos + Arduino Uno + PWM driver with 5V but also supply 6V to two servos to maximize the torque and 7.4V to a higher range (6-8V) servo that has some serious lifting to do.
I suppose the questions that are bugging me are:
PDF schematic included.
I suppose the questions that are bugging me are:
- Is this setup considered common ground since everything comes back to the same accumulator? Some motors are powered through different converters than Arduino that controls them and I'm too new to this electronics business to not be a little worried.
- Will the battery provide only the current that is required or is it not that simple? If I splice the output of a 5V converter between a high-current servo driver and a low-current Arduino could there be some unsolicited amperes where they're not needed?
- Would the grounding require a dedicated plane of some kind, as there occasionally might be a serious current draw? Or is not an issue if it all mostly goes through wires (assuming they have proper thickness)?
PDF schematic included.
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