Current draw from servos when MSSC is unpowered

I’m using separate battery packs to provide servo power and control-board power with the micro serial servo controller. I’m trying to figure out if I need one switch or two.

If the control board power is disconnected, are the servos drawing any current at all? I’m told that ordnarily servos draw a couple mA when not receiving any control pulses. But maybe the MSSC board does something clever to disconnect them completely when the board is powered down? Or do I really need two switches?

- Joe


You’ll need two switches. The servo controller just distributes the servo power to the servos (you can see the traces running down the columns of pins).

- Jan