Hello everyone,
I'm working on a university project where I implemented an EMG-controlled robotic hand with 5 servo motors. The sketch has been working flawlessly for weeks, but today, out of nowhere, I started experiencing two major issues. I haven’t changed anything in my setup, so I’m really confused about what’s going wrong.
One servo motor suddenly stopped working
- The servo was working fine before but now doesn’t respond at all.
- I tried switching it to different PWM pins, but it still doesn’t move.
- Because of this, I assume the servo itself might be defective.
Arduino disconnects from the PC after every gesture
- After recognizing a gesture, the servos move accordingly, but then the Arduino disconnects from the PC, and the serial connection is lost.
- I have to reconnect the Arduino manually to be able to upload code again.
- I’m already using a 5V power supply as an additional power source for the servos.
Additional Information & Disclaimer:
- I don’t want to share my code since this is a university project, but I believe the issue is not in the code, as everything was working perfectly until now.
- I'm using an Arduino Uno R3 with SG90 servo motors.
- The servos are connected through a Grove shield on the Uno, using the corresponding Grove cables, since my EMG sensors only have a Grove connector.
Since these issues started randomly without any changes to my setup, I don’t know where to start troubleshooting. Has anyone experienced something similar? The unexpected disconnection of the Arduino after each gesture is the biggest problem.
Thanks in advance for any help! 
