Adafruit Micro Servo - High Powered, High Torque Metal Gear
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Add even more power to your robot with this metal-geared servo. The tiny little servo can rotate approximately 180 degrees (~90 in each direction), and works just like the standard kinds you're used to 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. Despite its size, this micro-servo is as strong as many 'standard' size servos! Works great with the Motor Shield for Arduino, our 16-channel Servo Driver, or by just wiring up with the Servo library. Comes with a few horns and hardware.
This micro servo packs a big punch for its little size. it's just a little bit bigger than our High Torque Metal Gear Micro Servo but runs with almost double the stall torque.
To control with an Arduino, we suggest connecting the orange control wire to pin 9 or 10 and using the Servo library included with the Arduino IDE (see here for an example sketch). Position "0" (1.5ms pulse) is middle, "90" (~2ms pulse) is all the way to the right, "-90" (~1ms pulse) is all the way to the left. Note that unlike most servos you may be familiar with, this one does not have mechanical stops!