Stackable Serial Expansion HAT [Discontinued] _MAKE_DEV_CIRCPLAY you will need to add

you will need to add a 20x2 header between your Pi 3 or Pi 4 and the Top pHAT

Sticks out 48mm (1

Auto-determine the necessary power requirements

so you can use it on any computer

you can run them along a thin edge

Stackable Serial Expansion HAT [Discontinued] _MAKE_DEV_CIRCPLAY you will need to addThe Serial Expansion HAT expands the functionality and capabilities of the Raspberry Pi, giving you an I2C interface & 2 channel UART with 8 programmable GPIO Pins. The HAT includes 8 programmable GPIO pins via I2C in which you can attach more accessories and add ons, and the board is stackable up to 16 layers, allowing up to 32 channels UART! The onboard LEDs also help you to identify the UART working status. Features Standard Raspberry Pi 40 pin