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16-Channel 12-bit PWM Servo Driver with I2C Interface
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You want to make a cool robot, maybe a hexapod walker, or maybe just a piece of art with a lot of moving parts. Or maybe you want to drive a lot of LEDs with precise PWM output. Then you realize that your microcontroller has a limited number of PWM outputs! What now? You could give up OR you could just get this handy PWM and Servo driver breakout. When we saw this chip, we quickly realized what an excellent add-on this would be. Using only two pins, control 16 free-running PWM outputs! You can even chain up 62 breakouts to control up to 992 PWM outputs (which we would really like to see since it would be glorious)
Top Customer Reviews
If you're going to run servos with this board you're going to want to put a capacitor on the board. The capacitor is not included however there are solder pads for a capacitor. A good rule of thumb is 100uF capacitor size for each servo you're going to drive. Or just do it right and put a big one on there. I put a 470uF 36v capacitor from Radio Shack on there and I'm running two mini servos off the 5v bus on the pi. But a 10v capacitor would be better, they're smaller and would fit better.
There are no included instructions and no good pinout even on Adafruit's learning website. Adafruiut has a good set of sample code on their web site. Here is the pinout I used for my Pi B+
Pi GND (Pin 25) -> Servo board GND Pin
Pi SCL (Pin 5) -> Servo board SCL Pin
Pi SDA (Pin 3) -> Servo Board SDA Pin
Pi 3.3V (Pin 1) -> Servo Board VCC Pin
Pi 5V (Pin 4) -> Servo Board V+ Pin