Embedded Learning & Robotics Forum

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How to connect multiple servo motors to Arduino Uno?

Arduino Programming
I'm building a robotic arm with 4 servo motors but I'm having power issues. The servos work individually but when I connect all4, they don't move properly. Should I use an external power supply?
Asked by Alex R.
3 replies 2 hours ago
Yes, you definitely need an external power supply for multiple servos. The Arduino can only provide limited current through its 5V pin. Use a 5V/3A power supply and connect the servo power lines to it, while keeping the signal wires connected to Arduino pins.
Replied by Dr. Sarah Chen -1 hour ago

Raspberry Pi camera not working with OpenCV

Raspberry Pi
I'm trying to use the Pi camera module for computer vision but getting "camera not detected" error. The camera works fine with raspistill command but not with my Python OpenCV code.
Asked by Maria L.
2 replies 5 hours ago
Make sure you're using the correct camera index in cv2.VideoCapture(). For Pi camera, try cv2.VideoCapture(0) or enable legacy camera support in raspi-config if using newer Pi OS versions.
Replied by Tech Support - 4 hours ago

Best sensors for obstacle avoidance robot?

Sensors & Components
I'm building an autonomous robot that needs to navigate around obstacles. Should I use ultrasonic sensors, LIDAR, or camera-based detection? What are the pros and cons of each approach?
Asked by David K.
1 reply 1 day ago

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