Product description: PCA9685 - 16-channel, 12-bit PWM I2C servo driver - Adafruit 815.
Precise 12-bit PWM signal generator. Enables up to 16 servos to be controlled. It uses only two I2C interface lines for communication. Thanks to address selection (0x60-0x80), 62 devices can be connected on one bus, which gives 992 PWM channels supported by one master microcontroller, such as Arduino Uno.
Main features
- Voltage of the logical part: 3.3 V to 5 V.
- Servomotor supply voltage: up to 6 V.
- All outputs are described on the board.
- Built-in clock resonator, thanks to which the microcontroller signal does not have to be continuously sent to the system.
- Possibility to select I2C bus address (0x60-0x80) via jumpers, which allows to connect 62 devices.
- The PWM signal resolution is 12 bits, the frequency can be adjusted between 40 Hz and 1000 Hz.
- It has push-pull or open-drain digital outputs.
- Equipped with protection against inverse connection of power supply voltage.
- There are holes on the board to solder a large capacitor in case of interference due to too much current being drawn by the servo.
- It has 220 Ω resistors connected in series in the output circuits, thanks to which you can directly control LEDs.
- The set includes connectors for self-assembly:
- 1 x screw - to connect the power supply voltage,
- 4 x 3x4 goldpin strips, 2.54 mm raster for connecting servos.
- 1 x 1x6 goldpin strip for connecting logical signals using wires.
- Module dimensions are 62.5 x 25.4 x 3 mm
- No joints: 5,5 g
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Arduino compatible product The manufacturer providesArduinolibraryon GitHub anduser's guide. |
Connection
The pins are holes forgoldpin strips - raster 2.54 mm(included), all pins are properly signed on the board.
| Pin | Description |
|---|---|
| GND | The weight of the system. |
| OE | When a high state is given to this pin, all outputs are disconnected. |
| SCL | I2C bus clock line. |
| SDA | I2C bus data line. |
| VCC | Logical part supply voltage |
| V+ | Servomotor supply voltage, also available on top of the board via ARK connector (self-soldering kit). |
Useful links |
