TM1637 4 Digit 7 Segment LED Display

51 MCU LED Digital Clock DIY Kit (Green) – 1-Inch Light-Control Display with Housing for STEM Learning This 51 MCU Digital Clock DIY Kit is a hands-on educational project designed to help learners understand the basics of microcontrollers, electronics, and digital circuits. With a bright 1-inch LED digital tube display and built-in light-control functionality, the clock provides a clear and interactive way to explore timekeeping principles. The kit includes all essential components along with a sturdy housing, making it a great introduction to real-world electronics assembly.Perfect for STEM and STEAM learning, this kit encourages creativity, analytical thinking, and problem-solving skills. Designed for beginners, students, and hobbyists, it allows users to experience practical electronics in a fun and engaging way. Whether used in classrooms, workshops, or home-learning environments, the DIY digital clock helps children and young adults build confidence through hands-on exploration and experimentation. Features: Hands-on DIY digital clock kit powered by a 51 microcontroller system. Bright 1-inch LED digital tube display with light-control functionality. Includes durable housing and all required components for assembly. Great for STEM/STEAM learning: science, technology, engineering, art, and math. Helps build creativity, practical skills, observation, and problem-solving abilities. Ideal for school projects, family learning, and maker workshops. Easy-to-follow study guide included for step-by-step learning.

DIY 1-Inch LED Electronic Clock Kit (White) – Light-Control MCU Display Set with Enclosure This DIY Electronic Clock Kit offers a fun and educational way to explore basic electronics and microcontroller programming. Equipped with a bright 1-inch LED tube display and powered by a 51-series MCU, it provides a hands-on introduction to circuit assembly, soldering, and digital timekeeping. With its responsive light-control feature, the display automatically adjusts brightness based on ambient lighting, making it practical for both day and night use. Designed to support STEAM learning, the kit encourages creativity, analytical thinking, and problem-solving skills. It comes as a fully unassembled set, giving learners the opportunity to build the clock from scratch and understand how each component works. Once assembled, the included casing gives the project a clean and polished finish, making it suitable for use in classrooms, workshops, and home labs. Features: 1-inch LED time display with automatic light-sensing brightness adjustment. Based on a 51 MCU for stable and accurate timekeeping. Delivered as a DIY unassembled kit for hands-on learning. Supports STEAM concepts, including electronics, engineering, and design. Simple and enjoyable to build for students, beginners, and hobbyists. Comes with a protective housing for a finished look. Includes study instructions to guide the assembly process.

DIY 51 MCU Electronic Clock Kit (Red) – 1" Light-Control LED Display with Assembly Case for STEM Projects This DIY 51 MCU Electronic Clock Kit offers an engaging way to learn core electronics and microcontroller concepts. It features a clear 1-inch LED digital display paired with an intelligent light-control function, ensuring visibility in different lighting conditions. The kit comes unassembled, allowing learners to understand every part of the build, from wiring to mounting, while gaining confidence in practical electronics. Designed for STEM and STEAM education, this kit encourages curiosity, experimentation, and hands-on problem-solving. It's an excellent tool for students, hobbyists, and makers looking to explore timekeeping circuits and microcontroller basics. Whether used in classrooms or at home, it helps develop creativity, scientific thinking, and technical skills through a fun, interactive building experience. Features: DIY microcontroller-based clock kit for hands-on learning and experimentation. Equipped with a bright 1-inch LED digital display and automatic light-control function. Includes pre-cut housing and all necessary electronic parts for easy assembly. Supports STEM/STEAM skill development in electronics, engineering, and problem-solving. Helps nurture creativity, observation, and practical building ability. Suitable for home learning, school labs, and maker workshops. Comes with a study-style instruction manual for guided learning.

1-Inch LED Digital Display DIY Clock Kit (Blue) – Light-Control MCU Project Set with Casing This DIY LED Digital Clock Kit is an excellent hands-on project for anyone interested in learning how microcontroller-based circuits work. Built around a 51-series MCU, it features a bright 1-inch LED tube display and an automatic light-sensing function that adjusts brightness according to the environment. The kit arrives as individual components, giving learners the opportunity to assemble, solder, and understand every part of the circuit. Created with STEM and STEAM education in mind, this kit helps improve logical thinking, practical assembly skills, and fundamental electronics knowledge. Whether used in a school lab, a maker space, or a home learning setup, it offers a fun and meaningful way to encourage creativity, experimentation, and scientific curiosity. The included housing completes the project with a clean, finished look once assembled. Features: DIY digital clock project featuring a 1-inch LED display for clear time reading. Light-sensing feature ensures suitable brightness in different lighting conditions. Comes as a complete unassembled kit to promote hands-on learning. Strengthens STEM/STEAM concepts such as circuitry, design, and problem-solving. User-friendly build suitable for classrooms, hobbyists, and beginners. Includes a protective enclosure for a neat and durable finish. Includes study instructions to guide the assembly process.

SmartElex 5-inch TFT LCD Capacitive Touch Display 800×480 SmartElex 5-inch TFT LCD Capacitive Touch Display (800×480) is a compact graphical interface solution designed for students, hobbyists, engineers, and product developers who need a responsive touchscreen for their projects. It provides a clear and smooth display experience, making it ideal for building user interfaces in prototypes, educational projects, and small production devices. With its capacitive touch panel, users can interact effortlessly through precise touch inputs, making it suitable for applications that need intuitive control and quick navigation without external buttons or controls. This display is well-suited for robotics dashboards, IoT control panels, industrial monitoring, and home automation systems that require real-time interaction. It can be integrated with popular microcontrollers and development platforms like Arduino, Raspberry Pi, and ESP32 through appropriate interface modules, allowing makers and startups to develop projects with minimal setup time. The robust build and consistent touch response help ensure reliable performance in long-term installations, while the versatile visual output supports both experimentation and final project deployment in labs, workshops, and field environments. Features: Bright and clear 5-inch TFT LCD screen with high-resolution visuals for sharp graphics and text Responsive capacitive touch interface for smooth and accurate touch control Wide viewing angles and good color reproduction for easy visibility from different directions Compatible with development platforms like Arduino, Raspberry Pi, and ESP32 with suitable interface support Suitable for interactive user interfaces in robotics, IoT devices, automation systems, and custom control panels Durable design for regular use in prototyping and finished electronic projects

SmartElex ILI9341 3.2-inch TFT LCD display 240×320 SmartElex ILI9341 3.2-inch TFT LCD Display (240×320) is a vibrant and easy-to-use screen designed for projects that need a larger visual interface without adding complexity. This 3.2-inch TFT display offers enough space to clearly show text, graphics, menus, and real-time data, making it an excellent choice for students, hobbyists, engineers, educators, and startups who want to build user interfaces, data monitors, or handheld devices. It provides a practical way to upgrade visual output in embedded systems without jumping to high-cost or oversized display solutions. Powered by the ILI9341 driver, this display works smoothly with Arduino, Raspberry Pi, ESP32, and similar development boards, enabling simple integration into robotics dashboards, IoT terminals, automation panels, smart controllers, and prototyping projects. Its SPI communication allows straightforward wiring and dependable performance, supporting responsive visual updates for both experimentation and final builds. Whether you're designing a learning project, developing a prototype product, or creating a functional control interface, this display offers a reliable foundation with clear and colorful output suitable for everyday electronics development. Features: 3.2-inch 240×320 TFT LCD panel for clear visual output ILI9341 display driver for stable and smooth rendering Multiple interface options: SPI or parallel for flexible integration RGB565 color format for rich and vibrant graphics Works with Arduino, Raspberry Pi, ESP32, and similar platforms Perfect for UI screens, monitoring panels, and embedded system displays

Waveshare 3.5inch Capacitive Touch LCD IPS Display Module 320×480 The Waveshare 3.5-inch Capacitive Touch LCD IPS Display Module is a compact yet powerful display solution featuring a 320 × 480 pixel resolution that delivers crisp visuals and excellent clarity. Designed with an IPS panel, it offers wide viewing angles and consistent color performance, making it ideal for graphical interfaces and interactive applications. The module integrates the ST7796S display driver for reliable display control and the FT6336U capacitive touch controller for accurate, multi-touch responsiveness. Optimized for embedded development, this 3.5 inch LCD Raspberry Pi display is perfectly suited for Raspberry Pi projects, control panels, and custom HMI applications where space, touch precision, and visual quality matter. Features: 320×480 resolution, 262K colors, clear and colorful displaying effect High touch screen transmittance, fast response and long lifetime Embedded with ST7796S driver chip and FT6336U capacitive touch control chip, using SPI and I2C communication respectively, minimizes required IO pins Onboard TF card slot for storing more pictures, videos, music, etc. Adapting 15PIN connector and 18PIN FPC slot for connecting the LCD module to the host board Onboard voltage translator, compatible with 3.3V / 5V operating voltage Comes with online development resources and manual (examples for Raspberry Pi / ESP32 / Raspberry Pi Pico / Arduino) SPI and I2C Control Interfaces: Pin Description 15PIN Pin No. 18PIN Pin No. VCC Power (3.3V / 5V input) 1 1 3V3 Power (3.3V input) 2 NC GND Ground 3 3 MISO SPI MISO pin 4 6 MOSI SPI MOSI pin 5 5 SCLK SPI CLK pin 6 4 SD_CS TF card chip selection, low active 7 10 LCD_CS LCD chip selection, low active 8 9 LCD_DC LCD data/command selection (high for data, low for command) 9 7 LCD_RST LCD reset pin, low active 10 8 LCD_BL LCD backlight pin 11 2 TP_SDA Touch panel data pin 12 14 TP_SCL Touch panel clock pin 13 13 TP_INT Touch panel interrupt pin 14 15 TP_RST Touch panel reset pin, low active 15 12

ESP32 LoRa with 0.96 Inch Blue OLED Display ( Type C- Connector) The ESP32 LoRa SX1278 is a next-generation IoT development board made for smooth connectivity and long-range, low-power communication. The Tensilica LX6 dual-core ESP32 processor (240MHz, 520 KB SRAM, 600 DMIPS) powers it. The esp32 wifi module for Arduino  has dual-mode Bluetooth (Classic + BLE) and Wi-Fi (802.11 b/g/n HT40) for fast, flexible networking. This esp32 lora module provides ultra-long-range transmission up to 2.6km with an inbuilt SX1278 LoRa modem, 433MHz, -148dBm sensitivity, and +20dBm output power, guaranteeing great dependability for distant Internet of Things applications. It has a CP2102 USB-to-serial chip, a 0.96-inch OLED display, 32MB Flash, and lithium battery charging. It was designed with efficiency and innovation in mind. This ESP32 with an OLED display  is completely compatible with Arduino, enabling developers to design intelligent, scalable solutions for the Internet of Things' future. Check out our collection of LoRa Modules ! Features: Uses Lexin ESP32 as main controller and SX1278 as wireless communication module. Comes with an OLED display. Supports Bluetooth and WiFi connectivity. ESP32 chip is based on Tensilica Xtensa LX6 dual-core microprocessor with operating frequency up to 433MHz. High sensitivity of about -148dBm. Power output of +20 dBm. Operates on 433MHz-510MHz frequency range. Suitable for remote modem applications that require long-range wireless communication. ESP32 LoRa Pinout: Applications Smart industrial devices, including Programmable Logic Controllers (PLCs) Smart medical devices, including wearable health monitors. Smart energy devices, including HVAC and thermostats. Smart security devices, including surveillance cameras and smart locks.

Fracktal Works TWIN Dragon 400 FDM 3D Printer The Fracktal Works TWIN Dragon 400 FDM 3D Printer is fantastic for anyone who loves 3D printing. It has a dual extruder, which means it can print two materials at once, making it easier to create big and detailed parts. You can print fast, with speeds up to 400 mm/s, and it has a large build area of 400 mm x 400 mm x 400 mm. This makes it perfect for quickly making prototypes or parts for different projects. Plus, it supports special materials that can dissolve away, so you can create complex shapes without worrying about removing supports. Using Fused Deposition Modeling (FDM) technology, this printer works with many materials like ABS, PLA, Nylon, and even stronger options like PEEK. It’s great for students, businesses, or anyone who enjoys making models. With helpful features like a heated build chamber and auto bed leveling, getting started is easy. If you're looking for one of the best 3D printers in India, the TWIN Dragon 400 is definitely worth checking out! Features: Dual extrusion for complex designs. Large build volume: 400 mm x 400 mm x 400 mm. Fast print speed: up to 400 mm/s. Direct drive extruder for precise filament feeding. Adjustable layer resolutions: 100 to 800 microns. Heated build chamber for various materials. Compatible with ABS, PLA, Nylon, PEEK, and more. Auto bed leveling for easy setup. Filament chamber heater keeps filament dry. User-friendly touchscreen interface. Durable design for industrial and educational use. Ideal for prototypes, industrial parts, and production models.

Bambu Lab H2D AMS Combo 3D Printer The Bambu Lab H2D AMS Combo 3D printer is a high-performance, dual-nozzle machine designed for makers and professionals seeking speed, precision, and flexibility. Built with industrial-grade materials and AI-powered capabilities, this 3D printer supports multi-material and multi-colour printing, ensuring accurate and detailed results. Its modular design allows users to expand functionality over time with optional laser engraving and pen tool kits, making it a versatile solution for creative projects, prototyping, and advanced 3D printing applications. Features: Multi-Material Printing Flexible and rigid, low-cost and exotic materials in one print Digital Cutting Precise cutting of a range of materials Auto Arrangement: Maximise Material Efficiency and Reduce Waste Bambu Suite uses real-time photos from the BirdsEye camera to automatically arrange your project based on the shape of your material, such as leftover plywood from a prior job. This function allows you to get the most out of each material. Improved Laser Performance: Air Assist and Contactless 3D Mesh for Better Results Improve your laser's performance with a two-part solution designed for excellent results. Air Assist improves your cutting and engraving by removing smoke and debris, resulting in a cleaner surface and sharper lines. At the same time, the Contactless 3D Mesh function automatically changes the laser focus to fit non-flat surfaces, ensuring consistent, high-quality results across your project. 350°C Hotend with 65°C Chamber Heating Unlock the full potential of high-performance materials. The H2D provides perfect closed-loop temperature control thanks to active chamber heating at 65°C and a high-temperature hotend capable of reaching 350°C. This sophisticated technique successfully minimizes bending and deformation in high-performance materials, resulting in enhanced layer bonding and optimizing their potential. REAL High-Flow Hotend: Print at 600mm/s with Ease The H2D's purpose-built high-flow hotend enables consistent, fast printing at 600mm/s. Designed for consistent performance, it eliminates mid-print flow rate constraints, allowing for continuous high-speed printing regardless of print size or complexity. Nozzle Camera: Monitor Extrusion at the Nozzle Tip The H2D includes an AI-powered nozzle camera with a macro lens. This intelligent monitoring system continuously monitors extrusion patterns and detects material accumulation, filament deviations, and extrusion failures. Pre-Flight Checklist by AI Before each operational cycle, H2D's vision system starts a thorough pre-flight checklist: Chamber Integrity Scan detects debris on the whole print surface. Hardware Configuration Audit - Instantly determines nozzle size and build plate parameters. Digital-Physical Alignment - Automatically checks for compliance between detected hardware specs and active slicer parameters. SOTA Filament Monitoring: 15 Sensors on a Single Filament Route Unlike older systems that use single filament run-out detectors, the H2D has full material flow monitoring. Throughout the AMS-to-nozzle journey, 15 strategically placed sensors establish a sophisticated network that continuously monitors five critical parameters: feeding velocity, tension, filament tip location, extruder temperature environment, and dynamic extrusion pressure. This creates an industry-leading filament behaviour control system.

3.5in TFT LCD Shield for Arduino The 3.5" TFT LCD Display Shield for Arduino has been fully assembled, tested, and is ready to use. Install the TFT display without any wiring or soldering! Simply plug it in and load a library; you'll be up and running in less than 10 minutes! It works best with any traditional Arduino ATMEGA328 board. So add a beautiful display shield with a built-in microSD card connection to your Arduino project. This TFT LCD is large (3.5?? diagonal), bright (4 white LED backlights), and colorful (262,000 different shades)! The TFT display has 480x320 pixels and individual pixel control. It has a significantly higher resolution than a black and white 128x64 display. Check out Best 3.5-inch Touch Screen for Raspberry Pi Precautions while using the 3.5in TFT LCD Display Shield The control and driving circuit of this display module is low voltage and the FRIDA micro-power CMOS circuit, can be easily damaged by static, static damage is irreparable damage, and sometimes humans have hundreds of volts of high voltage static electricity, therefore, in handling, assembling and use should be extremely careful to prevent static electricity: Using soldering iron or power FRIDA tools must be well grounded and operate, make them without leakage. Do not use your hand to touch the leads, circuit boards and metal boxes. Do not use a vacuum cleaner for cleaning, because it generates strong static electricity; When the air is dry, can also generate static electricity, therefore, workshop humidity shall be above RH60%. If it is necessary to direct contact it , should enable the human body in the same potential with the modules? ,or make human body be well grounded. Remove or back in the bags or move locations, also need to be careful to prevent static electricity. Don't replace or discard the original packing. Electrostatic damage or man-made damage is not within the scope of the warranty. Features: Arduino 3.5" diagonal TFT LCD Display Shield. Fully assembled, tested, and operational. Installation doesn't involve any wiring or soldering. Optimally functions with conventional Arduino ATMEGA328 boards. Has an integrated microSD card slot. Big display with a diagonal dimension of 3.5". Four white LED backlights make it bright. Vibrant with 262,000 distinct tones. 480x320 pixels at a high resolution with individual pixel control. Supports Arduino compatible boards, PIC, STM32, and AVR boards. Applications: DIY projects that require visual displays. Arduino-compatible gadgets and devices. Embedded systems. Prototyping User Interfaces. Creating Interactive Artworks. Educational presentations and experiments. Data-logging and visualization projects. Environmental monitoring systems. Games and entertainment apps. Displays used for industrial control and automation. Interfacing 3.5 INCH TFT Display Shield with Arduino

0.91 inch Blue OLED Display Module This 0.91 inch Blue OLED Display Module has a resolution of 128x32 pixels. They are much thinner than LCD displays with good brightness and produce more accurate and true colors. This OLED Display Module is very compact and will enhance your Arduino project's user interface experience. This is an I2C OLED display, The I2C (also known as IIC) serial interface is used to connect this display to Arduino. OLEDs are the future of displays because they have some of the most significant advantages over both conventional display technologies, LCDs and LEDs. The most appealing aspect of using OLED displays is that they do not require a backlight like conventional LCD/LED screens. Electroluminescence (EL) is a property of organic materials that causes them to "glow" when stimulated by a current or an electric field. The most energy-efficient displays ever!!! When powered by a DC 2.8V supply, the 0.91 inch 128x32 Blue OLED Display Module produces White text on a Blue background with excellent contrast. The OLED Display Modules have a very wide viewing angle as well. If you want to use this OLED display module in your Arduino project, for that you will need few essential components like Jumper wires Breadboard Batteries or power supply Pin Description: GND: Power ground VCC: Power positive SCL: Clock Line SDA: Data Line Features: No need of the backlight The display is self-illuminating Power requirement is low They are offering the large viewing angle Better performance characteristics than traditional LCD and LED displays. Check out our wide range of collection of OLED display modules which are reliable, durable, and top-performing displays every time.

Bambu Lab X1 Carbon 3D Printer The Bambu Lab X1 Carbon 3D Printer is a versatile and reliable additive manufacturing solution tailored for both beginners and seasoned professionals. Featuring a sleek, compact design, it integrates effortlessly into home studios, classrooms, or professional workspaces. The X1 Carbon stands out for its precision and high-quality output, thanks to its sturdy aluminum frame that minimizes vibrations and ensures exceptional print accuracy. With a generous build volume, it enables the creation of large prototypes or multiple smaller models in a single print cycle, making it ideal for a wide range of applications. What to Expect with the X1 Carbon 3D Printer Acceleration: 20 m/s². Micro lidar assisted bed leveling. Active vibration compensation improves print quality. Spaghetti failure detection and automatic pause Print resumes after power outage. Advanced Materials Enable Advanced Projects. Bambu Lab X1-Carbon, which has additional cooling and a strengthened nozzle and drive gear, allows for a larger range of materials such as PA, PC, PET, and TPU, as well as carbon fiber and glass fiber reinforced polymers. Designed for Speed Colors and Beyond Bambu Lab's Automatic Material System (AMS) allows for printing in different colors and materials. Vibration and Extrusion Compensation The active vibration correction (XY) algorithm and extrusion compensation ensure extra smoothness and quality prints. AI-Powered Evolution Dual Automatic Bed Leveling The Dual Auto Bed Leveling mechanism ensures enhanced reliability.The lidar and analog force sensors cross-check to provide an extra layer of redundancy in bed leveling. Al Scrutinized the First Layer Tired of waiting for the first layer? The lidar sensor can check your first layer, allowing you to go on to something else. Spaghetti Detection Our Al keeps an eye out for Spaghetti monsters, so you can rest easy knowing your printer is safe from this plague. Sync with Bambu Studio and Bambu Handy Bambu Studio and Bambu Handy allow you to remotely operate and monitor your printer. You may also use the built-in camera to record timelapse films. Features: Multicolor and Multimaterial Capability High-quality printing at 7 μm Lidar resolution. Dual Automatic Bed Leveling Micro Lidar-assisted bed levelling Active vibration compensation improves print quality. Spaghetti failure detection and automatic pause Print resumes after power outage. The printer can consume up to 1000W of power at 220V, but only 350W at 110V. The maximum build plate temperature is 110°C, with a maximum of 120°C at 110 volts. The Bambu Lab X1-Carbon 3D Printer has two build plate options: the Bambu Textured PEI Plate and the Bambu Cool Plate. Both come pre-installed and compatible with the Micro Lidar system.

Bambu Lab A1 Combo 3D Printer with AMS Lite for Multi-Colour 3D Printing The Bambu Lab A1 Combo is an advanced 3D printer includes the AMS lite for smooth multi-color 3D printing . It features full auto calibration , active flow rate compensation , and a quick-swap nozzle system for easy maintenance. With active noise-canceling motors, it runs quietly while delivering high-quality results. The A1 Combo 3D printer machine offers a generous 256×256×256 mm³ build volume and supports a range of filaments like PLA, PETG, and TPU . Features Intuitive Touchscreen Interface Designed for simplicity, the Bambu Lab A1 Combo features a smartphone-like touchscreen UI that makes operation easy, even for beginners. High-Speed Precision Printing Combining a bed-slinger design with CoreXY-like speed and quality, the A1 3D printer uses full-metal rails, a rigid frame, nozzle pressure sensors, accelerometers, and a powerful MCU to achieve fast, precise prints—capable of printing a Benchy in just 14 minutes. Active Flow Rate Compensation With a high-resolution eddy current sensor, the Bambu Lab A1 Combo precisely monitors and adjusts flow rates during printing for smooth, accurate extrusion, ensuring flawless details on every corner. AMS Lite for Multi-Colour Printing The included Bambu Lab AMS Lite system brings hassle-free multi-colour 3D printing to everyone, offering reliable and user-friendly performance. 1-Touch Filament Loading/Unloading Forget manual filament handling—A1 automates filament loading and unloading with a simple touch. Auto Belt Monitoring and Adjustment The Bambu Lab A1 Combo 3D printer automatically checks belt tension and alerts users if adjustments are needed, ensuring optimal performance through its HMS (Health Management System). Full-Auto Calibration From bed levelling to vibration resonance, Z-offset, and nozzle pressure, the A1 3D printing machine fully automates calibration before every print for maximum reliability and quality. Durable, All-Metal Construction Built with all-metal rails, bearings, and frame, the A1 is engineered for long-lasting reliability and consistent results. MakerWorld & 1-Click Printing Seamlessly print from MakerWorld, Bambu Lab’s next-gen 3D printing model platform, with 1-click printing via the Bambu Handy App or manage prints easily using Bambu Studio and the Handy App anytime, anywhere.

1 Channel 12V Relay Module with Optocoupler The ADIY 1-Channel Relay Module with Optocoupler operates on a 12V power supply. This module offers bidirectional isolation and enables control of the relay pull through a choice of high or low levels, based on user requirements. It features a genuine high-quality power relay, a subminiature package optocoupler, a high-power high-voltage transistor, and red and blue signal indicators. The module's layout board is thoughtfully designed to ensure comprehensive stability and reliable performance, making it suitable for a wide range of power control applications. The maximum load for the normally open interface is AC 250V/10A and DC 30V/10A. Moreover, it utilizes high-quality ultra-small optocouplers with excellent anti-interference capabilities and stable performance, requiring only a trigger current of 3mA. Features: Equipped with high-current relay 10A@250VAC / 10A@30VDC It can control both AC and DC appliances such as Solenoids, Motors, lights, fans, etc. High-quality screw terminals (Terminal Block) provided (C, NC, NO) for quick and easy connection A freewheeling diode to protect your microcontroller Input Signal Pin connected to Burg stick for easy accessibility LED status indicators to indicate the relay ON/OFF status Mounting holes provided Signal input with a high-level signal, the common and often start conduction; The relay can directly control all kinds of equipment and load; One often opened a normally closed contact; Blue KF301 terminal line more convenient. Also check the Single CHANNEL 12V RELAY MODULE 30AMP available on Iotcart. The relay module is capable of actuating 240VAC/30A circuits safely and offers output modes for both Normally Open and Normally Closed configurations