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HCDCRPi GPIO Status LED & Terminal Block Breakout Board HAT for Raspberry Pi A+ 3A+ B+ 2B 3B 3B+ 4B

HCDCRPi GPIO Status LED & Terminal Block Breakout Board HAT for Raspberry Pi A+ 3A+ B+ 2B 3B 3B+ 4B

Q: has this been tested with POE hats or any other existing hats?

I originally installed a 3 relay contactor hat, but quickly grew out of that. I had to upgrade the power supply (Mean Well MDR-60-5) to 60 watts which powers the Pi (bypassing the micro USB port), 16 relay contactors (not all used), 8 sensors, and 4 3.3v step down regulators. The Pi is not a very good power source, especially 3.3v. All the gear is mounted on C45 DIN rails to avoid breadboards. All wire junctions are screw down like the this hat. Also the LEDs were very helpful in debugging. The code and it's relationship to the GPIO is quite complex. Latency and hysteresis were an ongoing challenge. I wouldn't cover the LEDs with another hat.

Q: According to diagram, the posts appear to be one way (diode) from the gpio head. can i send signal back to the pi from this breakout?

The diode is a led. Set the GPIO pin of your choice to output and the led will show the state of the output of that GPIO pin. Set the GPIO pin of your choice to input and the led will show the state of whatever is input to that GPIO pin.

Q: What are the length and width of the connector that fits onto the 40-pin header? I want to see if it will fit through the slot in the top of my case.

This is not the answer I was looking for. I would like to see if I can use this breakout box with the cover installed on my Raspberry Pi case. It has a slot 55 mm long X 8 mm wide. Will the header connector fit through this slot?

Q: Will it work with Pi Zero W?

Yes, the item can support Pi Zero W, But only two screw holes can be fixed.

Product ID: 377130319

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Details

Current Rating
3 Amps
Item Pitch
3.5
Connector Type
Screw
Number Of Contacts
20
Mounting Type
PCB Mount

🔴3.3V power LED indicator

🔵5V power LED indicator

🟢GPIO status LEDs

Description

💡 Light up your Pi projects with precision and style!

INSTANT GPIO INSIGHT - One-to-one LED mapping with Raspberry Pi pins for real-time logic level monitoring
ULTRA LOW POWER LE DS - Each LED draws only 0.1mA, ensuring zero interference with GPIO signals
READY TO USE ASSEMBLY - Fully soldered and assembled with premium copper and nylon hardware for hassle-free setup
ROBUST TERMINAL BLOCK - 3.5mm pitch screw terminals support 16-26 AWG wires for secure connections
UNIVERSAL PI COMPATIBILITY - Seamlessly fits Raspberry Pi A+, 3A+, B+, 2B, 3B, 3B+, and 4B models

The HCDCRPi GPIO Status LED & Terminal Block Breakout Board HAT is a fully assembled accessory designed for Raspberry Pi models A+ through 4B. It features dedicated LEDs for 5V (blue), 3.3V (red), and GPIO status (green) that correspond directly to the Pi’s 2x20 pin header, enabling quick and intuitive monitoring of GPIO logic levels. With ultra-low 0.1mA LED current draw, it ensures no signal interference. The 3.5mm pitch screw terminal block supports a wide wire gauge range (16-26 AWG) for secure connections, making it an essential tool for developers and makers seeking efficient GPIO debugging and clean wiring.

Specifications

Current Rating	3 Amps
Item Pitch	3.5 Millimeters
Connector Type	Screw
Number Of Contacts	20
Mounting Type	PCB Mount
Material	Koper, Nylon
Colour	blue, red
Brand	HCDC
Voltage	3.3 Volts
Number Of Poles	40
Product Dimensions	6.5W x 2.8H Centimeters
Manufacturer	Xiken Electronic Technology Co., Ltd.
Country of Origin	USA
Model number	HD040
Item Weight	50 g
Item model number	HD040
Processor brand	ARM
Connectivity Technology	GPIO
Operating System	Raspberry Pi OS
Are batteries included?	No
Hardware Interface Type	3.5mm Audio

Have a Question? See What Others Asked

has this been tested with POE hats or any other existing hats?

According to diagram, the posts appear to be one way (diode) from the gpio head. can i send signal back to the pi from this breakout?

What are the length and width of the connector that fits onto the 40-pin header? I want to see if it will fit through the slot in the top of my case.

Will it work with Pi Zero W?

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