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 https://elecena.pl/product/22720649/gravity-io-expansion-hat-for-raspberry-pi 2023-03-07 https://elecena.pl/product/22720649/gravity-io-expansion-hat-for-raspberry-pi 2023-12-27 https://elecena.pl/product/22720649/gravity-io-expansion-hat-for-raspberry-pi 2024-09-19 https://elecena.pl/product/22720649/gravity-io-expansion-hat-for-raspberry-pi 2024-11-29 https://elecena.pl/product/22720649/gravity-io-expansion-hat-for-raspberry-pi 2024-11-30 https://elecena.pl/product/22720649/gravity-io-expansion-hat-for-raspberry-pi 2025-02-13 https://elecena.pl/product/22720649/gravity-io-expansion-hat-for-raspberry-pi 2025-04-10 https://elecena.pl/product/22720649/gravity-io-expansion-hat-for-raspberry-pi 2025-08-05 https://elecena.pl/product/22720649/gravity-io-expansion-hat-for-raspberry-pi 2025-11-28 https://elecena.pl/product/22720649/gravity-io-expansion-hat-for-raspberry-pi 2025-11-29