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Asked — Edited

Servo Power Supply And Connections

Do the 3 servo wires have to be connected to the EZ-B v4, or can the power wires of several servos be connected to a common power source with only the signal wire connected to the controller?

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United Kingdom
#1  
You can connect to a different power source, the only thing to remember is to use a common ground.
#2  
Great, thanks. That's the same as Arduino then.
#3  
can you explain how to common the ground?
United Kingdom
#4  
A common ground is when all grounds are joined together, therefore common.

The easiest method is usually to link all grounds of the batteries/power supplies together.

Like in this diagram

User-inserted image


All ground connections are connected at some point throughout the circuit.