MCM Electronics

16-Channel 12-bit PWM Servo Driver with I2C Interface By Adafruit (815) MCM Part #28-17454

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$13.49 
MSRP: $14.95
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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.

Using only two pins, control 16 free-running PWM outputs! You can even chain up 62 breakouts to control up to 992 PWM outputs.

Chip features
  • 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, its completely free running!
  • 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
Breakout board features
  • Terminal block for power input (or you can use the 0.1"" breakouts on the side)
  • Reverse polarity protection on the terminal block input
  • 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
Dimensions
  • 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.
Part Numbers
MCM Part #:28-17454
Adafruit Part #:815
Package Specifications & Dimensions
Weight:0.0625 lbs.
Hazardous:No
RoHS Comp:Yes
Warranty:180 days
Need to Return?
Length:3 in.
Width:2.5 in.
Height:0.25 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No

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