Good afternoon and sorry for my English,
I wanted to tell you about a problem I had with a robotic arm.
I followed the tutorial to create a robotic arm:https://howtomechatronics.com/tutorials/arduino/diy-arduino-robot-arm-with-smartphone-control/, I connected all the components to the protoboard, I entered the code and I have installed the application. When I wanted to check if everything worked correctly I have seen that the servomotors (both full-turn and small ones), only vibrate a little and do not turn. They vibrate every time I give an imput.
The fact that they vibrate makes me think that everything is correctly connected. I tried disconnecting and connecting servomotors but nothing changes.
What can I do to fix it?