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

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

Product ID: 384231630

Details

Brand
HCDC
Colour
blue red
Connector type
Screw
Current rating
3 Amps
Gauge
26.0
Item pitch
0.14 inches

🔴3.3V power LED indicator

🔵5V power LED indicator

🟢GPIO status LEDs

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Description

💡 Debug Smarter, Wire Cleaner, Code Faster!

INSTANT GPIO INSIGHT - One-to-one LED mapping with Pi's 2x20 pin header for real-time logic level monitoring.
PLUG PLAY ASSEMBLY - Pre-soldered and assembled for effortless installation on Raspberry Pi A+/3A+/B+/2B/3B/3B+/4B.
ULTRA LOW POWER LE DS - Each LED draws only 0.1mA, ensuring zero interference with GPIO signals.
ROBUST SCREW TERMINALS - Supports 26-16 AWG wires with secure M2 steel screws for clean, reliable connections.
PRO GRADE BUILD QUALITY - Durable alloy steel, copper, and nylon materials designed for long-term PCB mounting.

This HCDC breakout board for Raspberry Pi models A+ through 4B features dedicated 5V (blue), 3.3V (red), and GPIO (green) LEDs that provide instant visual feedback on pin states. Its low-current LEDs (0.1mA) ensure no signal disruption, while the 3.5mm pitch screw terminals accommodate 26-16 AWG wires for secure, professional-grade connections. Pre-assembled and designed for direct 2x20 pin header mounting, it streamlines prototyping and permanent installs with clear pin labeling and robust materials.

Specifications

ASIN	B08RDYDG6X
Brand	HCDC
Colour	blue, red
Connector Type	Screw
Current Rating	3 Amps
Customer Reviews	4.8 4.8 out of 5 stars (320)
Gauge	26.0
Manufacturer	Xiken Electronic Technology Co., Ltd.
Manufacturer Part Number	HD040
Material	Alloy Steel, Copper, Nylon
Model Number	HD040
Mounting Type	PCB Mount
Number Of Contacts	40
Number Of Poles	40
Number of Items	1
Number of Positions	40
Pitch	0.14 inches
Voltage	3.3 Volts

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₨22556

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In stock

Sold byAmazon Sri LankaDelivered 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 Sri Lanka.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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