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Description

It's an I²C-controlled PWM driver with a built in clock. That means that, unlike the TLC5940 family, you do not need to continuously send it signal tying up your microcontroller, it's completely free running!.
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).
Reverse polarity protection on the terminal block input.
Dimensions (no headers or terminal block) 2.5" x 1" x 0.1" (62.5mm x 25.4mm x 3mm) Weight (no headers or terminal block): 5.5grams Weight (with 3x4 headers & terminal block): 9grams.
This product comes with a fully tested and assembled breakout as well as 4 pieces of 3x4 male straight header (for servo/LED plugs), a 2-pin terminal block (for power) and a piece of 6-pin 0.1" header (to plug into a breadboard). A little light soldering will be required to assemble and customize the board by attaching the desired headers but it is a 15 minute task that even a beginner can do. You may also use right-angle 3x4 headers.

Adafruit 16-Channel 12-bit PWM/Servo Driver I²C Interface - PCA9685 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 perhaps you want to drive a lot of LEDs with precise PWM output. You realize your microcontroller has a limited number of PWM outputs, what now? Get this handy PWM and Servo driver breakout. It is 5V compliant, which means you can control it from a 3.3V microcontroller and still safely drive up to 6V outputs (this is good for when you want to control white or blue LEDs with 3.4+ forward voltages) 6 address select pins so you can wire up to 62 of these on a single I²C bus, a total of 992 outputs - that's a lot of servos or LEDs Adjustable frequency PWM up to about 1.6 KHz 12-bit resolution for each output - for servos, that means about 4us resolution at 60Hz update rate Configurable push-pull or open-drain output Output enable pin to quickly disable all the outputs We wrapped up this lovely chip into a breakout board with a couple nice extras Terminal block for power input (or you can use the 0.1" breakouts on the side) Green power-good LED 3 pin connectors in groups of 4 so you can plug in 16 servos at once (Servo plugs are slightly wider than 0.1" so you can only stack 4 next to each other on 0.1" header) "Chain-able" design A spot to place a big capacitor on the V+ line (in case you need it) 220 ohm series resistors on all the output lines to protect them, and to make driving LEDs trivial Solder jumpers for the 6 address select pins

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Adafruit16-Channel 12-bit PWM/Servo Driver - I�C Interface - PCA9685

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