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Adafruit 16-Channel 12-bit PWM/Servo Driver - I2C interface - PCA9685 PRODUCT ID: 815

ADAF_0815

Nuevo producto

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.

Más detalles

5 artículos

14,05 €

Descuentos por volumen

Cantidad Descuento Usted ahorra
5 1% Hasta 0,70 €
20 2% Hasta 5,62 €
35 3% Hasta 14,75 €
50 4% Hasta 28,10 €
65 5% Hasta 45,66 €
80 6% Hasta 67,44 €
100 7% Hasta 98,35 €

Más

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)

  • 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

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)
  • Reverse polarity protection on the terminal block input. The terminal block included with your product may be blue or black.
  • 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

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. If you want to use right-angle 3x4 headers, we also carry a 4 pack in the shop.

Check out our tutorial with CircuitPython & Arduino libraries/examples, wiring diagrams, schematics, Fritzing and more!

Technical Details

Specifications:

  • 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 board/chip uses I2C 7-bit address between 0x40-0x7F, selectable with jumpers

Datasheets, EagleCAD PCB files, Fritzing object and more in the tutorial!

Revision History:

  • As of Feb 16, 2015 we now use a much beefier polarity-protection transistor. Functionality is otherwise the same
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