{"title":"IO Expansion HAT for Raspberry Pi 4B/3B+","handle":"io-expansion-hat-for-raspberry-pi-4b-3b","url":"/products/io-expansion-hat-for-raspberry-pi-4b-3b","description":"An I/O expansion HAT for Raspberry Pi 4B and 3B+ that breaks out all GPIO pins into clearly labelled digital, analogue, PWM, I2C, UART, SPI, and I2S interfaces. The board is compatible with DFRobot Gravity series sensors and modules, allowing plug-and-play connections without complex wiring.\n\nThe HAT supports both 3.3 V and 5 V sensors (with 3.3 V logic level), and includes an external power input (6–12 V) for the PWM ports, making it suitable for driving multiple servos directly from the board.\n\nKey Features\n\n\nFull GPIO Breakout – Digital, analogue, PWM, I2C, UART, SPI, and I2S ports\n\nGravity Compatible – Plug-and-play with DFRobot Gravity series sensors\n\nDual Voltage Support – 3.3 V and 5 V sensor interfaces\n\nPWM External Power – 6–12 V input for servo control\n\nRaspberry Pi HAT Format – Plugs directly onto the 2×20 GPIO header\n\n\nSpecifications\n\n\nOperating Voltage – 5 V\n\nPWM External Power – 6–12 V\n\nSensor Interface Voltage – 3.3 V\n\nDimensions – 65 × 56 mm\n\nCompatibility – Raspberry Pi 4B, 3B+\n\n\nIdeal For\n\nConnecting multiple Gravity sensors to Raspberry Pi\nServo control projects with external power\nPrototyping IoT and automation systems\n\n\nPackage Contents\n\n1× IO Expansion HAT for Raspberry Pi\n\n\nResources\n\nProduct Wiki\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":4768,"title":"Default Title","sku":"DF-DFR0566","price":16.77,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":58,"option1":"Default Title"}]}