Gravity: IO Expansion HAT for Raspberry Pi
This IO Expansion HAT from DFRobot is the perfect prototyping companion for your Raspberry Pi 4. It breaks out all of the IO ports on Raspberry Pi including digital ports, analog ports, PWM, I2C, UART, SPI and IIS – ready for use to use with sensors and other components.
The HAT is also compatible with DFRobot Gravity Series modules, which frees users from complicated connection work and enables them to just concentrate on building their projects.
The Raspberry Pi GPIO pins work with a maximum logic level of 3.3V. Apart from 3.3V modules, the HAT also supports:
- Sensor and module with 5V power supply and 3.3V level
- PWM external power supply (6~12V)
- Controlling multiple servos
Specifications
- Operating Voltage: 5V
- PWM Port External Power: 6-12V
- Sensor Interface External Power: 3.3V
- BCM pin labels
- Dimension: 65 x 56 mm
- Compatible with all 40-pin Raspberry Pi boards
Resources
- Product wiki
Package Contents
1x Gravity: IO Expansion HAT for Raspberry Pi
Pinout
| PCB | Label | Description |
| + | + | 3.3V Positive |
| – | – | Negative |
| ⊕ | ⊕ | Binding post connect to external power positive |
| ㊀ | ㊀ | Binding post connect to external power negative |
| Digital | 0-27 | Raspberry Pi GPIO0-GPIO27 |
| PWM | 0-3 | PWM signal output pin 0-3 |
| Analog | 0-3 | Analog signal input pin 0-3 |
| IIC | C | IIC port clock line |
| D | IIC port data line | |
| UART | T | UART Transmit port |
| R | UART Receive port | |
| 5V | 5V | 5V positive |
| GND | GND | Negative |
| IIS | SCK | IIS serial clock line |
| DIN | IIS serial data input | |
| LCK | IIS L/R channel selection line | |
| BCK | IIS system clock line | |
| SPI | MISO | SPI data output line |
| SS | SPI enable pin | |
| SCLK | SPI serial clock line | |
| MOSI | SPI data input line |
