PCA9685 - 16- Channel , 12-Bit PWM/Servo Driver Module - I2C Interface
Do you need too many PWM channels in your application or you need to control several servo motors at once, if yes!this module is best suited for you. Based on Adafruit PCA9685 module, this module can be used to generate 16 PWM signals at any given time, all these pwm channels can be configured individually using a simple 2 -Wire I2C Interface. You just have to configure a few register and the PWM settings will be latched unless changed again using I2C write procedure. Not only that, you can chain up more than one of these modules to have any number of PWM channels in your system.
PCA9685 Datasheet [Redirect to NXP.com]
- Free running operation, you need not to send control signal or clock continously, once settings are done they will be effective unless changed in next i2c write cycle.
- 6 Address select pins in case you need to have more than one of these module on same I2C Bus. You can cascade 62 such modules and have total of 992 PWM channels, this makes this modules suitable for RGB display panel control.
- 12-bit resolution at each channel, that's very accurate for most of the precision control applications.
- Output enable pin to quickly enable/disable all the outputs at once.
Adafruit, original developer of this module have written a nice getting started tutorial on using this module, with all the schematic, arduino library etc. Go to Adafruit Tutorial on PCA9685.