--- product_id: 324523323 title: "HCDC RPi GPIO Status LED & Terminal Block Breakout Board HAT for Raspberry Pi A+ 3A+ B+ 2B 3B 3B+ 4B" brand: "hcdc" price: "฿3679" currency: THB in_stock: true reviews_count: 5 category: "Hcdc" url: https://www.desertcart.co.th/products/324523323-hcdc-rpi-gpio-status-led-and-terminal-block-breakout-board store_origin: TH region: Thailand --- # 3.3V power LED indicator 5V power LED indicator GPIO status LEDs HCDC RPi GPIO Status LED & Terminal Block Breakout Board HAT for Raspberry Pi A+ 3A+ B+ 2B 3B 3B+ 4B **Brand:** hcdc **Price:** ฿3679 **Availability:** ✅ In Stock ## Summary > 💡 Light up your Pi projects with precision and style! ## Quick Answers - **What is this?** HCDC RPi GPIO Status LED & Terminal Block Breakout Board HAT for Raspberry Pi A+ 3A+ B+ 2B 3B 3B+ 4B by hcdc - **How much does it cost?** ฿3679 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/324523323-hcdc-rpi-gpio-status-led-and-terminal-block-breakout-board) ## Best For - hcdc enthusiasts ## Why This Product - Trusted hcdc brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Instant GPIO Insight:** One-to-one LED mapping with Pi’s 2x20 GPIO pins 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 models. - • **Ultra-Low Power LEDs:** Each LED draws only 0.1mA, ensuring zero interference with GPIO signals. - • **Complete Mounting Kit:** Includes nylon standoffs and nuts for stable, clean, and reliable PCB mounting. - • **Robust Screw Terminals:** 3.5mm pitch terminals support 26-16 AWG wires for secure, professional-grade connections. ## Overview The HCDC RPi GPIO Status LED & Terminal Block Breakout Board HAT is a pre-assembled expansion board designed for Raspberry Pi models A+ through 4B. It features color-coded LEDs (blue for 5V, red for 3.3V, green for GPIO) that provide immediate visual feedback on GPIO pin states without affecting signal integrity. The board includes robust 3.5mm pitch screw terminals compatible with 26-16 AWG wires, ensuring secure and professional wiring. With a 2x20 pin header and included mounting hardware, it offers a seamless, reliable solution for prototyping, debugging, and permanent installations. ## Description 1, The item has been soldered and assembled. Support for Raspberry Pi A+ 3A+ B+ 2B 3B 3B+ 4B 2, GPIO status LED and power 5V / 3.3V indication. GPIO output or input level high LED on, output or input level low LED off. 5V blue, 3.3V red, GPIOs green. The position of the LED is in a one-to-one correspondence with the position of the Raspberry Pi 2x20pin connector, and the logic level of the GPIO can be observed very quickly and intuitively. The driving current of each LED is only 0.1mA, so you don't have to worry about it affecting the read and write status of GPIO. 3, Terminal block pitch 3.5mm/0.138", wire size range 26AWG to 16AWG, strip length 5mm, screw M2 steel, pin header and cage copper. 2 x 20 pins expansion pin header, height 8mm/0.32" 4, Packing list: 1x terminal block breakout module, 4x M2.5x16mm nylon standoffs, 4x M2.5x6mm nylon standoffs, 4x M2.5 nylon nuts(NOTE: the item not include Raspberry Pi Board). 5, CAD 3D (pdf): https://m.media-desertcart.com/images/I/B1Is+sAHViS.pdf Review: I used this breakout board in my Raspberry Pi–based oven controller, and it made wiring and debugging way easier. The screw terminals keep connections secure and clean, and the LED indicators on each GPIO pin are incredibly helpful for monitoring pin state at a glance—no more guessing if your code or wiring is working. It plugs directly onto the Pi's GPIO header and includes clear pin labels, so setup was fast and error-free. Perfect for permanent installs or prototyping where reliability and visibility matter. Highly recommend for any Raspberry Pi GPIO project—especially if you’re driving relays, sensors, or building something like a custom control panel. This board makes it way easier to troubleshoot and maintain. Review: Way better than using the pins ## Features - The item has been soldered and assembled. Support for Raspberry Pi A+ 3A+ B+ 2B 3B 3B+ 4B - GPIO status LED and power 5V / 3.3V indication. GPIO output or input level high LED on, output or input level low LED off. 5V blue, 3.3V red, GPIOs green. The position of the LED is in a one-to-one correspondence with the position of the Raspberry Pi 2x20pin connector, and the logic level of the GPIO can be observed very quickly and intuitively. The driving current of each LED is only 0.1mA, so you don't have to worry about it affecting the read and write status of GPIO. - Terminal block pitch 3.5mm/0.138", wire size range 26AWG to 16AWG, strip length 5mm, screw M2 steel, pin header and cage copper. 2 x 20 pins expansion pin header, height 8mm/0.32". - Packing list: 1x terminal block breakout module, 4x M2.5x16mm nylon standoffs, 4x M2.5x6mm nylon standoffs, 4x M2.5 nylon nuts(NOTE: the item not include Raspberry Pi Board). - CAD 3D (pdf): https://m.media-desertcart.com/images/I/B1Is+sAHViS.pdf ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08RDYDG6X | | Brand Name | HCDC | | Centerline Length | 3.5 Millimeters | | Connector Type | Screw | | Customer Reviews | 4.7 4.7 out of 5 stars (320) | | Manufacturer | Xiken Electronic Technology Co., Ltd. | | Material Type | Copper | | Model | HD040 | | Mounting Type | PCB Mount | | Number Of Contacts | 40 | | Number Of Poles | 20 | | Number of Positions | 20 | | Part Number | HD040 | | Pitch | 3.5 Millimeters | | Voltage | 3.3 Volts | ## Product Details - **Connector type:** Screw - **Item pitch:** 3.5 Millimeters - **Material:** Copper - **Mounting type:** PCB Mount - **Number of contacts:** 40 ## Images ![HCDC RPi GPIO Status LED & Terminal Block Breakout Board HAT for Raspberry Pi A+ 3A+ B+ 2B 3B 3B+ 4B - Image 1](https://m.media-amazon.com/images/I/81qX5HPfs6L.jpg) ## Questions & Answers **Q: has this been tested with POE hats or any other existing hats?** A: 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?** A: 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.** A: 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?** A: Yes, the item can support Pi Zero W, But only two screw holes can be fixed. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by E***N on 20 May 2025* I used this breakout board in my Raspberry Pi–based oven controller, and it made wiring and debugging way easier. The screw terminals keep connections secure and clean, and the LED indicators on each GPIO pin are incredibly helpful for monitoring pin state at a glance—no more guessing if your code or wiring is working. It plugs directly onto the Pi's GPIO header and includes clear pin labels, so setup was fast and error-free. Perfect for permanent installs or prototyping where reliability and visibility matter. Highly recommend for any Raspberry Pi GPIO project—especially if you’re driving relays, sensors, or building something like a custom control panel. This board makes it way easier to troubleshoot and maintain. ### ⭐⭐⭐⭐⭐ Review *by R***G on 22 November 2024* Way better than using the pins ### ⭐⭐⭐⭐⭐ Review *by E***K on 20 April 2022* Since Amazon likes to combine reviews for totally different products, this review is for the HCDC RPi GPIO Status LED & Terminal Block Breakout Board HAT. I'm not sure why people complained about putting this board in a case. It is pretty obvious that many HATs will not fit inside a closed case. This board will work with a male to female 40-pin flat extender cable if you remove the two plastic posts on either side of the connector. You really don't need those posts except to permanently attach it to the base board or another HAT. The connector works pretty well as a "foot" and you can leave the other posts for feet on the other side. I am using a Compute Module 4 with a WaveShare IO baseboard. This has plenty of clearance above the Waveshare heat sink and Compute Module 4. Although I can't close the case, I could file a slot in the cover and use a ribbon cable. My only minor complaint is that the signal designations on the terminal blocks are ordered differently than for the connector pins. I haven't figured out if there is a system to it, but they seem quite random. In some cases the label is the GPIO pin and in some cases it is the usual function, like "TX' or "RX". Probably it wasn't possible (or easy) to make a layout on the terminal blocks to match the connector pin ordering. With a little bit of care in finding the right connection, this provides all the signals. What impressed me was the construction. If this is built by hand, it was done very well. There were no cold solder joints, splashes or burnt lands from using too much heat. It actually looks like it was put through a wave soldering or surface mount soldering machine. The plastic posts could have been metal, but they're good enough being plastic. For the price, this board is a good value. I'm porting an OS to the Compute Module 4, and this board has saved me from hanging LEDs off of my board. It is also nice to see the serial port TX and RX data to at least know of the signals are reversed (one LED on instead of 2). ## Frequently Bought Together - HCDC RPi GPIO Status LED & Terminal Block Breakout Board HAT for Raspberry Pi A+ 3A+ B+ 2B 3B 3B+ 4B - Raspberry Pi 4 Model B 2019 Quad Core 64 Bit WiFi Bluetooth (4GB) - Freenove Breakout Board for Raspberry Pi 5 / 4B / 3B+ / 3B / 3A+ / 2B / 1B+ / 1A+ / Zero 2 W/Zero W/Zero, Terminal Block Shield HAT with Pin Header, GPIO Status LED --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.th/products/324523323-hcdc-rpi-gpio-status-led-and-terminal-block-breakout-board](https://www.desertcart.co.th/products/324523323-hcdc-rpi-gpio-status-led-and-terminal-block-breakout-board) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-23*