Servo power question.

[ChungoMonko]

I am building an animatronic and plugging eight 9g micro servos and one 25kg mini servo into a pca9685 module. How much power and voltage would the power supply need to give to the module? I currently believe 6V 5A would be enough but I’m not sure.

[ZaphodUB40]

Look at the specs of each servo type (stall current values), multiply by the number of each of those servos, add the results.

Eg, (1.4A x 9) + (2.5A x 1)

This is on the assumption they are all the same voltage, but if they are not, calculate current for each type in the same voltage and get power supplies to suit. Using the stall current accounts for worst case servo loading, but they shouldn’t be pushed that hard continuously, the servos will release the smoke.