Fancy making a cool robot such as a hexapod walker for your Raspberry Pi, or maybe you want to drive a lot of LEDs with precise PWM (Pulse Width Modulation) Output? The Raspberry Pi only has one hardware and one software PWM output, so you'll need the Adafruit 16 Channel 12 Bit PWM and Servo Driver Breakout Board, so drive on multiple channels!
You can control up to 16 free-running PWM outputs using only two pins and you can even chain up 62 breakouts to control up to 992 PWM outputs. It's an i2c-controlled PWM driver with a built in clock which means that, unlike the TLC5940 family, you do not need to continuously send it signal tying up your microcontroller, its completely free running!
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.
The Adafruit 16 Channel 12 Bit PWM and Servo Driver Features:
5V Compliant - 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 - 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 - That means about 4us resolution at 60Hz update rate for servo's
Configurable push-pull or open-drain output
Output enable pin to quickly disable all the outputs
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
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