Amazon.com: POE HAT (B) for Raspberry Pi 4B/3B+,Power Over Ethernet HAT with 0.91" OLED,Support 802.3af PoE Network,802.3af Power-Sourcing Equipment Required : Electronics
Amazon.com: GeeekPi Fan Hat for Raspberry Pi 4 Model B, PWM Fan GPIO Expansion Board with 0.91inch OLED Display for Raspberry Pi 4B/3B+/3B/2B : Electronics
Raspberry Pi to Arduino MKR bridge HAT — Arduino Online Shop
Grove Base Hat for Raspberry Pi | Seeed Studio Wiki
IO Expansion Hat for Raspberry Pi 5 / 4 / 400 / 3 - DFRobot
Raspberry Pi PoE+ HAT : ID 5058 : Adafruit Industries, Unique & fun DIY electronics and kits
High Power Zigbee2MQTT HAT for Raspberry Pi | CC2652P Zigbee HAT for Raspberry Pi | Home Assistant CC2652P Zigbee | ELEKITSORPARTS
Amazon.com: UCTRONICS PoE HAT for Raspberry Pi 4B/3B+, Power Over Ethernet (PoE) Support 802.3af PoE Network Standard, Compatible with Pi 4B / 3B+ : Electronics
Motor Driver HAT for Raspberry Pi, I2C Interface
Raspberry Pi A+/B+/Pi2/Pi3 Prototyping HAT (RPi-Proto-HAT) - Watterot
Best Raspberry Pi HATs 2024: Expansion Boards for Every Project | Tom's Hardware
Adafruit Perma-Proto HAT for Pi Mini Kit - No EEPROM : ID 2310 : Adafruit Industries, Unique & fun DIY electronics and kits
Witty Pi 4 HAT - RTC & Power Management for Raspberry Pi : ID 5704 : Adafruit Industries, Unique & fun DIY electronics and kits
Raspberry Pi Sense Hat
Raspberry Pi 3G/4G-LTE Base HAT
Raspberry Pi Wireless Hat I/O Module – Widgetlords Electronics
Power Over Ethernet (PoE) HAT for Raspberry Pi 3 B+ 4 and 802.3af PoE
Amazon.com: waveshare Power Over Ethernet (PoE) HAT for Raspberry Pi 4B/3B+, 802.3af/at PoE Network Standard, 5V USB-A&12V Header Outputs, PoE HAT Onboard Cooling Fan and MP8676 Buck Chip, Isolated : Electronics
Eight Relays 4A/120V 8-Layer Stackable HAT for Raspberry Pi
Raspberry Pi Build HAT - DEV-18705 - SparkFun Electronics
32 Channel Digital Expansion HAT for Raspberry Pi - RobotShop
Pmod HAT Adapter for Raspberry Pi
