servo

[moonshinesg]

i tried to run a very basic servo test based on the example in the documentation (servo1 = pyb.Servo(1) ) and it all worked well. Since it was a full rotation servo i used servo1.speed(x) to test it. All was well until I set servo1.speed(0) to stop it. Then the REPL froze. Not knowing what happened I tried another board. Same thing. All well until .speed(0).
Turns out both boards are "fried". Not showing up on USB, one has just faint LED lights (red, orange & blue) and the other one has nothing.

Anyone has similar bad experience and what is the explanation ? I don't dare to try a 3rd board.... but I would like to be able to use servos with the py board (new boards, I guess)...

Thanks.

The servo is a TowerPro MG995

[pythoncoder]

First I suggest checking if the boards are really fried. Disconnect any hardware including your servo, power the Pyboard via USB and try emergency boot mode 3 referenced here https://docs.micropython.org/en/latest/ ... neral.html. This should restore the board to a working state.

If it doesn't I suggest you report exactly how your board and servo are powered and connected. The Pyboard is pretty robust but an overvoltage could kill it.

[deshipu]

How did you connect the servo?

[moonshinesg]

the servo was connected to the X4, VIN and ground, really nothing fancy.
As mentioned, it worked, but when i did a `servo1.speed(0)` the board "froze". No emergency boot works. I even tried to do a DFU and the board does not get detected.

I am sure it's fried but I just want to figure out why so I do not repeat with another board...