DIY Proto HAT Shield Extension Board for Raspberry Pi 4 Model B / 3B+ / 3B RPI GPIO Board for RPI 4B

the specifications for the DIY Proto HAT Shield Extension Board for Raspberry Pi 4 Model B, 3B+, and 3B:

1. Compatibility:
   • Designed for use with Raspberry Pi 4 Model B, 3B+, and 3B.
2. Prototyping Area:
   • Large solderable breadboard area for custom circuit building and component placement.
3. GPIO Header:
   • Features a 40-pin GPIO header for easy connection to the Raspberry Pi.
4. Power Supply:
   • Voltage and ground rails are available on the breadboard area for power distribution.
5. I2C and SPI Pins:
   • Labeled pins for I2C and SPI communication for connecting sensors and other devices.
6. Onboard Components:
   • Provision for adding components such as resistors, capacitors, LEDs, and more for circuit experimentation.
7. Screw Terminal Blocks:
   • Terminal blocks for secure connections, especially useful for external power sources or larger components.
8. Mounting Holes:
   • Four mounting holes for easy attachment to your project or Raspberry Pi case.
9. Prototyping Space Markings:
   • Clear markings on the breadboard area to assist with component placement.