Servo
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Micro Servo Motor SG90
$4.86Micro Servo Motor SG90 is a tiny and lightweight server motor with high output power. Servo can rotate approximately 180 degrees (90 in each direction), and works just like the standard kinds but smaller. You can use any servo code, hardware or library to control these servos. Good for beginners who want to make stuff move without building a motor controller with feedback & gear box, especially since it will fit in small places. It comes with a 3 horns (arms) and hardware.
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Servo Driver HAT for Raspberry Pi
$23.76The Servo Driver HAT for Raspberry Pi is a hardware add-on board for the Raspberry Pi microcomputer. It allows the Raspberry Pi to control up to 16 servo motors simultaneously, making it ideal for robotics and automation projects. The HAT (Hardware Attached on Top) design makes it easy to install and use, simply plugging it onto the Raspberry Pi’s 40-pin GPIO header. The Servo Driver HAT uses the I2C interface for communication with the Raspberry Pi, which allows for efficient use of the available GPIO pins.