The IO Expansion HAT from DFRobot is an outstanding partner for your Raspberry Pi 4B/3B+. It brings out all the IO ports on the Raspberry Pi, such as digital ports, analog ports, PWM, IIC, UART, SPI, and IIS. What's more, this HAT is fully compatible with the DFRobot Gravity Series. This saves you from complex connection tasks and allows you to focus on building your projects. The Raspberry Pi GPIO pins operate at a maximum logic level of 3.3V. In addition to 3.3V power - supply sensors and modules, the product also supports 5V power - supply and 3.3V level sensors and modules, PWM external power supply (6 - 12V), and controlling multiple servos. Specification details include an operating voltage of 5V, a PWM port external power of 6 - 12V, a sensor interface external power of 3.3V, and dimensions of 65*56 mm/2.56*2.20”. You can refer to the product wiki for more information.
Using this IO Expansion HAT is easy. First, connect it to your Raspberry Pi 4B/3B+. Since it's compatible with the DFRobot Gravity Series, you can quickly attach sensors and modules without a lot of wiring hassle. When powering the product, make sure to use the correct voltages. The operating voltage is 5V, and the PWM port external power should be between 6 - 12V. For sensor interfaces, use 3.3V external power. When using sensors and modules with different power requirements, ensure they match the supported specifications. As for maintenance, keep the HAT clean and dry. Avoid exposing it to extreme temperatures or humidity. If you have any questions, check the product wiki for more in - depth guidance.
