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.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

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

€ 48.76

Duties & taxes included

In stock

Sold byAmazon PortugalDelivered 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 Portugal.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

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

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.