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.

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.

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?

Will it work with Pi Zero W?

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

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

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

Product ID: 377130319

Details

Connector Type
Screw
Current Rating
3 Amps
Item Pitch
3.5
Mounting Type
PCB Mount
Number Of Contacts
40

🔴3.3V power LED indicator

🔵5V power LED indicator

🟢GPIO status LEDs

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Description

💡 Light up your Pi’s potential with precision and style!

INSTANT GPIO INSIGHT - One-to-one LED mapping with 40-pin GPIO header for real-time logic level monitoring
ULTRA LOW POWER LE DS - Each LED draws only 0.1mA, ensuring zero interference with GPIO signals
COMPLETE MOUNTING KIT - Includes nylon standoffs and nuts for easy, stable PCB mounting and integration
ROBUST TERMINAL BLOCKS - 3.5mm pitch screw terminals support 16-26 AWG wires for secure, professional connections
UNIVERSAL PI COMPATIBILITY - Seamlessly supports Raspberry Pi A+, 3A+, B+, 2B, 3B, 3B+, and 4B models

The HCDC RPi GPIO Status LED & Terminal Block Breakout Board HAT is a precision-engineered accessory for Raspberry Pi models A+ through 4B. Featuring dedicated 5V (blue), 3.3V (red), and GPIO (green) LEDs aligned perfectly with the 40-pin header, it offers instant visual feedback on GPIO logic levels without signal interference. Its robust 3.5mm pitch terminal blocks accommodate a wide wire gauge range, ensuring professional-grade connectivity. The kit includes all necessary mounting hardware for a clean, secure installation, making it an essential tool for developers and makers seeking intuitive GPIO diagnostics and reliable wiring.

Specifications

ASIN	B08RDYDG6X
Best Sellers Rank	#75,431 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #559 in Motherboards
Brand Name	HCDC
Colour	blue, red
Connector Type	Screw
Current Rating	3 Amps
Customer Reviews	4.8 4.8 out of 5 stars (320)
Item Dimensions W x H	6.5W x 2.8H Centimeters
Item Weight	0.01 Ounces
Manufacturer	Xiken Electronic Technology Co., Ltd.
Material Type	Koper, Nylon
Model Number	HD040
Mounting Type	PCB Mount
Number Of Contacts	40
Number Of Poles	40
Number of Items	1
Number of Positions	40
Part Number	HD040
Pitch	3.5 Millimeters
Voltage	3.3 Volts

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B/.121

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In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Panama.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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