Decimal to BCD Priority Encoder IC - 74HC147 The 74HC Series 74HC147 are high-speed silicon-gate CMOS devices and are pin-compatible with low-power Schottky TTL (LSTTL). The 74HC147 9-input priority encoders accept data from nine active LOW inputs (l1 to l9) and provide binary representation on the four active LOW inputs (Y0 to Y3). A priority is assigned to each input so that when two or more inputs are simultaneously active, the input with the highest priority is represented on the output, with the input l9 line having the highest priority. These devices provide the 10-line to 4-line priority encoding function by use of the implied decimal “zero”. The “zero” is encoded when all nine data inputs are HIGH, forcing all four outputs HIGH. Pinout: Pinout Of 74HC147 IC

Desoldering Wick Desoldering wick, also known as desolder braid, is a handy tool made up of braided copper threads. Its purpose? To make desoldering faster and cleaner. When used in conjunction with a heated soldering iron, it works wonders in removing soldered joints. One of the great things about desoldering wick is its ability to effectively tackle solder that has gone astray. You see, sometimes solder ends up where it shouldn't be, like on a jumper or another unintended spot. That's where flux comes into play. By adding flux to the equation, it helps the solder flow away from its unwanted location and onto the wick, making the cleanup process much easier. It's amazing how versatile soldering can be. With the right tools, like solder wick, you can tackle a wide range of soldering tasks. So whether you're working on electronics or other projects that require precision soldering, having a roll of desoldering wick at your disposal is a smart move. It makes the desoldering process a breeze and ensures that your work is tidy and efficient.

DFRobot 3m SC-SC Single Mode Duplex Fiber Optic Jumper Cable The DFRobot 3m SC-SC Single Mode Duplex Fiber Optic Jumper Cable is designed for high-performance and long-distance data transmission. This 3mm diameter, 3-meter cable features a dual-core single-mode fiber, ensuring efficient propagation of light over long distances. Equipped with ceramic ferrule SC-type connectors and a protective shell, it offers low insertion loss, excellent repeatability, and high interchangeability. The cable also boasts a large return loss, tensile resistance, and outstanding durability, making it ideal for reliable and consistent performance in demanding environments. With its strong pull tension resistance, this fiber optic jumper is perfect for use in optical fiber communication systems, local area networks (LANs), fiber access networks, and other data transmission applications. Features Reduces signal degradation for efficient data transmission. Ensures reliable performance with consistent signal quality. Allows easy swapping between devices without loss in performance. Minimizes signal reflections, improving system stability. Withstands mechanical stress for long-lasting durability. Designed for high-efficiency data transmission in demanding environments. Applications Optical fiber communication systems Fiber optic access networks High-speed fiber data transmission Local area networks (LANs) and other related applications

DFRobot A01NYUB Waterproof Ultrasonic Distance Sensor (28-750cm Detection Range) The A01NYUB Waterproof Ultrasonic Sensor is a very useful device for finding out how far away something is, and it’s built tough for outdoor or wet places. It can measure distances from as close as 28cm to as far as 7.5 meters! Because it's fully sealed (that's what IP67 means), you don't need to worry about rain, splashes, or dust getting inside and spoiling it. This sensor is designed to be a dependable Long Range IP67 Sensor that can still give good readings even if the air is a bit smoky or dusty. Connecting this 750cm Ultrasonic Sensor to your project is easy because it talks using a standard UART serial connection, which is something most popular microcontrollers like Arduino or Raspberry Pi can understand without any fuss. The UART Ultrasonic Distance Sensor works by sending out a sound pulse (that humans can't hear) and then listens for the echo to come back, calculating the distance accurately. Dimensions Features Measuring Range: 28cm to 750cm (for flat objects). Waterproof Level: IP67 (totally protected from dust and water). Communication Type: UART (serial output). Works With: 3.3V to 5V power supply. Power Use: Very low, average current is less than 15mA. Response Time: Quick, around 100 milliseconds. Viewing Angle: About 55 degrees (with the bell-mouth attachment). A01NYUB Ultrasonic Distance Sensor with Arduino Circuit Diagram A01NYUB Ultrasonic Distance Sensor with Raspberry Pi Circuit Diagram

DFRobot A02YYUW Waterproof Ultrasonic Distance Sensor - 3-450cm Detecting Range The A02YYUW Waterproof Ultrasonic Distance Sensor is a reliable solution for distance measurement in challenging environments where water and dust protection is essential. With its IP67 waterproof rating, this sensor can be safely used outdoors, in industrial settings, or any application exposed to moisture and dust. The sensor offers an impressive detection range from 3cm to 450cm with a resolution of 1mm, making it suitable for various distance measurement projects from short-range obstacle detection to long-range monitoring. The integrated UART communication interface allows for simple connection to Arduino, Raspberry Pi, or other microcontroller platforms without complex wiring or additional components. This ultrasonic sensor features a compact design with a pre-attached 1-meter waterproof cable, allowing for easy installation in tight spaces or remote locations. The sensor operates on a wide voltage range from 3.3V to 5.5V DC and consumes only 10mA during operation, making it ideal for battery-powered projects. With a blind zone of just 3cm, the A02YYUW can detect objects at very close range, which is particularly useful in robotics and automation applications. The sensor's temperature compensation feature ensures consistent performance across varying environmental conditions, while its narrow 15° beam angle provides focused detection for accurate measurements. Whether you're building a water level monitor, parking assistant, or industrial automation system, this waterproof ultrasonic sensor delivers reliable performance in demanding conditions. Beam Directionalities Diagram Features Detection range: 3cm to 450cm with 1mm resolution Communication: UART interface (9600 baud rate) Waterproof rating: IP67 for complete dust protection and water immersion Operating voltage: 3.3V to 5.5V DC Current consumption: 10mA during operation, 3.5mA in standby Operating temperature: -15°C to 60°C Beam angle: 15° for focused detection Connection Diagram with Arduino Connection Diagram with Raspberry Pi Dimensions

DFRobot Fermion MEMS Methane CH4 Gas Sensor (Breakout, 1-10000ppm) The DFRobot Fermion MEMS Methane CH4 Gas Sensor is a compact and energy-efficient breakout board designed to detect methane concentrations from 1 to 10,000ppm. Powered by advanced MEMS technology, it features ultra-low power consumption (<20mA), minimal heat generation, and a fast response time. Its small size (13x13x2.5mm) makes it perfect for integration into gas leak detectors, safety systems, and environmental monitoring devices. Ideal for fire prevention and combustible gas detection, this sensor is part of a versatile MEMS series supporting multiple gas types for customizable sensing solutions. DFRobot Methane CH4 Gas Sensor Interfacing with Arduino Circuit Diagram Precautions for Use Remove the protective film before using the sensor. Avoid exposure to volatile silicon compounds (e.g., silicone adhesives, hair gels, silicone rubber). Do not expose the sensor to high concentrations of corrosive gases (e.g., H?S, SO?, Cl?, HCl). Prevent contamination from alkalis, alkali metal salts, and halogens. Avoid prolonged exposure to extreme environments (high temperature, humidity, or pollution). Keep the sensor away from water, condensation, and freezing conditions. Minimize mechanical stress—avoid strong vibration, impact, or dropping. Do not use this sensor in systems where failure could affect personal safety. If unused for a long time, preheat the sensor for at least 24 hours before reuse. Features Compact size: only 13 × 13 × 2.5mm, ideal for space-constrained applications Low power consumption: operating current less than 20mA High sensitivity with fast response and quick recovery time Built using advanced MEMS (Micro-Electromechanical Systems) technology Applications Health applications Fire detection Industrial safety Environmental monitoring Indoor air quality

DFRobot Fermion VL6180X ToF Distance Ranging Sensor (Breakout) with Header The Fermion VL6180X ToF Distance Ranging Sensor is a high-precision measurement tool that uses advanced Time-of-Flight technology to detect distances from 5mm to 100mm with millimeter accuracy. Unlike traditional infrared sensors that can be affected by object color or reflectivity, this sensor measures the actual time taken for light to travel to the target and back, providing consistent readings in various lighting conditions. The compact breakout board comes fully assembled with voltage regulation, I2C level shifting, and easy-to-use pin headers, making it perfect for students and hobbyists working on robotics, smart devices, or automation projects. This versatile sensor combines distance measurement with ambient light sensing in one small package, opening up possibilities for many creative applications. The VL6180X communicates through a simple I2C interface, making it compatible with popular platforms like Arduino and Raspberry Pi. With its small size (20.5mm × 15.6mm), low power consumption, and ability to work accurately in changing environments, this sensor is an excellent choice for gesture detection, object presence sensing, and precise distance measurement in tight spaces. Whether you're building a line-following robot, a touchless switch, or a smart inventory system, this ToF sensor provides reliable measurements for your electronics projects. Features Detection range: 5mm to 100mm with millimeter-level accuracy Integrated ambient light sensor with adjustable sensitivity Operating voltage: 3.3V to 5V DC with onboard voltage regulation Communication: I2C interface (address 0x29 by default) Compact dimensions: 20.5mm × 15.6mm × 3.1mm Immune to target color and reflectivity variations Compatible with Arduino, Raspberry Pi, and other microcontroller platforms DFRobot Fermion VL6180X ToF Distance Ranging Sensor with Arduino Connection Diagram

DFRobot Gravity PH3 Gas Sensor (Calibrated)  I2C, UART and Analog This Gravity PH3 Sensor is a very useful device to find out the amount of phosphine gas around you. It's perfect if you're working on projects for factories, checking safety in mines, or just want to know the air quality in places like godowns or closed rooms. The sensor has a special part (electrochemical probe) that is already fine-tuned at the factory. This means you can quickly and accurately measure Phosphine Gas Sensor levels right out of the box, without needing to do any complex setup. It’s also made to be tough and reliable. You can easily connect this PH3 Sensor to popular electronics boards like Arduino, ESP32, or Raspberry Pi using the simple Gravity connector. It's flexible because it can send data through I2C, UART, or even as an analog voltage signal, whichever suits your project. The sensor also has smart features like automatically adjusting for temperature changes to keep the readings correct, and it can even set off an alarm if the gas level gets too high. It's built to last for over two years, making it a good choice for your gas sensing needs. Features Gas Detected: Phosphine (PH3) Measures Up To: 0 to 1000 ppm (parts per million) Output Types: Analog, I2C, and UART Ready to Use: Factory calibrated (already set up) Connects To: Arduino, ESP32, Raspberry Pi, etc. Good Quality: Very sensitive and doesn't get easily disturbed Long Life: Can work for more than 2 years (in air) Power Needed: 3.3 Volts to 5.5 Volts DC I2C Setup: Has 32 I2C addresses you can choose from

DFRobot Mini Laser I2C Distance Range Sensor Module - 2-400cm Measurement Range The Mini Laser Distance Range Sensor is a compact yet powerful measurement tool that offers precise distance detection up to 4 meters. Perfect for students working on robotics, smart home projects, or any application requiring accurate distance measurement. This sensor features an IP67 waterproof rating, making it ideal for outdoor use, water-related projects, or dusty environments where regular sensors would fail. The simple I2C communication interface allows for easy connection to Arduino boards and other microcontrollers, making it accessible even for beginners in electronics. What sets this sensor apart is its combination of small size and high performance. Measuring just 15.1×15.1×10.1mm, it can fit into the tightest spaces while delivering reliable measurements at a frequency of 100Hz. The sensor operates with low power consumption (70mA working current) and requires no calibration, allowing you to start using it immediately after connection. Whether you're building an obstacle-avoiding robot, creating a smart parking system, or developing a water level monitor, this waterproof laser distance sensor provides the accuracy and durability needed for successful projects. Its wide operating temperature range (-20°C to 60°C) ensures consistent performance across various environmental conditions. Features Detection range: 0.1m to 4m with ±2% measurement accuracy IP67 waterproof and dustproof rating for harsh environment applications I2C communication interface (address 0x62) for simple connection Ultra-compact size: 15.1×15.1×10.1mm for space-constrained projects Low power consumption: 70mA working current, 3.3V-5V operating voltage Fast measurement frequency: 100Hz for real-time distance monitoring Wide operating temperature range: -20°C to 60°C for indoor/outdoor use Wiring Diagram of Laser Ranging Sensor and Arduino IO Expansion Shield

DFRobot SLAMTEC RPLiDAR A1M8 360 Degree Laser Range Finder – 12m Radius Range The RPLIDAR A1M8 is like a pair of eyes for your robot, letting it see everything in a full circle around itself. This advanced 360 Degree LiDAR Scanner spins around and uses a laser to quickly measure distances to objects up to 12 meters away. It creates a digital map of its surroundings, which is super useful if you're building a robot that needs to move around a room, avoid bumping into things, or even clean your house automatically. It takes up to 8000 distance readings every single second, so the maps it makes are quite detailed. Students and hobbyists will find this 12m Laser Range Scanner fantastic for all sorts of cool projects, especially for learning about robot navigation and SLAM (Simultaneous Localization and Mapping – which means the robot can figure out where it is while making a map at the same time). Thanks to its clever OPTMAG design, this SLAM LiDAR Sensor doesn't use old-style parts that wear out, so it's built to keep working for a long, long time (up to five years). It's designed to be easy to get started with, often just needing a simple USB connection. Features Scanning Range: Sees all around (0 to 360 degrees). Distance Measurable: From 0.15 meters up to 12 meters. How Fast it Scans: Takes up to 8000 distance samples per second. Spinning Speed: Adjustable from 2 to 10 times per second (Hz). Long Life Design: Uses OPTMAG technology for better durability (up to 5 years). Easy to Connect: Usually via USB adapter (often included in kits).