• 2P Terminal Block: 5V input for the PWM (V+) & GPIO output (Pin 10 V+)
• Two i2c device connectors:
• J20: GND, +5V, SDA, SCL (with a level converter, safe for 5V devices)
• J21: GND, 3V3, SDA, SCL

• 1.6A PolySwitch Fuse for V+ input protect.
  

• The PCA9685 is an I2C-bus-controlled 2x 16-channel LED controller optimized for LCD Red/Green/Blue/Amber (RGBA) colour backlighting applications. Each LED output has its own 12-bit resolution (4096 steps) fixed frequency individual PWM controller that operates at a programmable frequency from a typical of 40 Hz to 1000 Hz with a duty cycle that is adjustable from 0% to 100% to allow the LED to be set to a specific brightness value. All outputs are set to the same PWM frequency.
• PCA9685 also has a built-in oscillator for the PWM control. However, the frequency used for PWM control in the PCA9685 is adjustable from about 40 Hz to 1000 Hz as compared to the typical 97.6 kHz frequency of the PCA9635. This allows the use of PCA9685 with external power supply controllers. All bits are set at the same frequency. The PCA9685 has 4096 steps (12-bit PWM).
• J3 DA0 ~ DA7: U14 Port A and J6 BA0 ~ BA7: U14 Port B
• R62, R63, R64 (for U14 Address select A0, A1, A2)

• U2 PCA9685 (PWM Port 0 ~ 15)
• R4, R5, R6, R7, R8, R9 (for U2 Address select A0, A1, A2, A3, A4, A5)

• U3 PCA9685 (PWM Port 0 ~ 15)
• R10, R11, R12, R13, R14, R15 (for U3 Address select A0, A1, A2, A3, A4, A5)

• PCA9685 Datasheet
  

Demo Program