General • Re: Pico Cannot Handle Multiple Servos ?

In light of OP pictures posted I wanted to also note that the yellow jumper seems to separate the wave share from the Pico for powering and it seems the Pico must be powered through its USB port / VBUS when waveshare is on battery.

The jumper is not separating power for Pico (there is a permanent diode connected which feeds the Pico), it's for selecting the 5V source for servos.

3.6V DC x 4 batteries in series is more than the input voltage of 12 volts of the regulator at 14.4V DC.

Fully charged can go 4.2V/cell, but I don't think that's the problem here.

I'm leaning more towards:

As others have said, the most likely cause of the problem is an unstable power supply. It's probably not a case of overloading - more likely the power supply goes overvoltage either due to instability with the short pulses of current being drawn by the servos, or possibly even the servos themselves feeding current back into the power supply as they 'brake' to stop at the commanded position.

I have a MG996R (360/continuous variant), I've seen some voltage spikes, just need to set up a current probe, and wish I had more time.

Statistics: Posted by gmx — Mon Jan 20, 2025 12:14 am

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