SCD40 I2C CO? Temperature & Humidity Sensor Breakout Module - 7Semi The 7Semi SCD40 is a compact sensor breakout based on Sensirion’s advanced photoacoustic NDIR technology. It accurately measures CO? concentration from 400 ppm to 40,000 ppm, along with ambient temperature and humidity. Ideal for air quality monitoring, HVAC systems, and IoT applications. It communicates over the I²C interface and is compatible with most microcontrollers. With low power consumption, long-term stability, and minimal recalibration requirements, the SCD40 is well-suited for portable and embedded systems requiring reliable environmental data. Features Photoacoustic CO? Sensing: Uses advanced photoacoustic infrared technology for high-precision CO? measurement. 3-in-1 Environmental Monitoring: Simultaneously tracks CO? levels, temperature, and humidity for a complete atmospheric overview. Wide CO? Detection Range: Measures concentrations from 400 ppm to 40,000 ppm, with optimal accuracy in the 400–2000 ppm range. High Accuracy: Offers a precision of ±(40 ppm + 5%), making it ideal for critical monitoring applications. Low Power Consumption: Consumes only 17 mA at 5s intervals and 0.5 mA at 5-minute intervals, perfect for battery-powered projects. Plug-and-Play Ready: Factory-calibrated and ready for immediate use—no manual calibration required. I2C Interface: Compatible with Arduino, Raspberry Pi, ESP32, STM32, and other popular microcontrollers via I2C. Compact Design: Small, robust module fits easily into embedded systems and space-limited enclosures. SCD40 carbon dioxide sensor Breakout I2C Arduino Connections

7Semi SHT40 Temperature & Humidity Sensor Breakout I2C Qwiic SHT40 Breakout (ES-13514) The 7Semi SHT40 Temperature & Humidity Sensor Breakout (I2C Qwiic) is a compact and reliable sensor module designed to measure both temperature and humidity with high accuracy. It is based on the Sensirion SHT40 sensor, making it suitable for modern electronics projects that need precise environmental data. This breakout board supports I2C communication and comes with a Qwiic connector, allowing quick and solder-free connections with microcontrollers like Arduino, ESP32, and Raspberry Pi. Its small size and low power consumption make it ideal for IoT devices, weather monitoring, indoor air quality projects, and learning applications where simplicity and accuracy matter. Features: High-accuracy temperature and humidity sensing using the SHT40 sensor Supports I²C communication for easy integration with microcontrollers Qwiic connector enables quick, solder-free plug-and-play connections Wide measurement range of 0–100% RH and –40°C to +125°C temperature Low-power and compact design, ideal for IoT and battery-powered projects Compatible with Arduino, Raspberry Pi, ESP32, and other development boards SHT40 Board Dimensions

7Semi SHT41 Temperature & Humidity Sensor Breakout with I2C Qwiic Interface The 7Semi SHT41 Temperature & Humidity Sensor Breakout is a high-precision humidity sensor module built for engineers, developers, and IoT creators who need reliable environmental data in compact embedded systems. Powered by Sensirion’s advanced CMOSens® technology, this I2C temperature sensor delivers accurate readings across a wide range, making it ideal for smart home automation, HVAC upgrades, weather stations, and industrial monitoring systems. With its accurate ±1.5% RH humidity and ±0.2°C temperature performance, it ensures consistent measurements even in demanding environments. Designed with a built-in Qwiic connector, the breakout allows fast, solder-free plug-and-play integration into Qwiic-compatible ecosystems like Arduino, Raspberry Pi, and other development platforms. Its quick response time, low power consumption, and compact 30 × 22 mm footprint make it a dependable environmental monitoring sensor for portable, battery-powered devices, IoT prototypes, and educational projects. Whether used in climate control systems or air-quality tracking, the SHT41 provides robust, long-term stability. Features: Designed with Sensirion’s CMOSens® technology to deliver high-accuracy temperature and humidity readings with long-term stability. Offers a full 0–100% RH humidity range and a wide temperature range of -40°C to 125°C, making it suitable for varied climates and applications. Integrated Qwiic connector provides seamless, solder-free connectivity for rapid prototyping and easy hardware integration. Supports I2C communication, allowing compatibility with Arduino, Raspberry Pi, ESP32, and other development platforms. Features a compact and lightweight 30 × 22 mm PCB, ideal for embedded and space-constrained designs. Operates on 3.3V–5V supply with low operating current, making it suitable for battery-powered and energy-efficient systems.

7Semi TMP117 Accurate Digital Temperature Sensor Breakout I2C (ES-12132) The 7Semi TMP117 Accurate Digital Temperature Sensor Breakout is a high-precision temperature sensing module that gives you very accurate digital temperature readings. It uses the advanced TMP117 sensor, known for its excellent accuracy and fine resolution, so you can trust the temperature data you collect. This makes it great for projects where precise temperature tracking matters. This breakout board communicates over a standard I2C interface, so you can easily connect it to popular controllers like Arduino, Raspberry Pi, or ESP32. It works over a wide temperature range and consumes very low power, helping keep your circuits efficient and stable. Whether you’re building environmental monitors, weather stations, or smart home systems, this sensor makes temperature measurement simple and reliable. Features: High-precision TMP117 digital temperature sensor Delivers very accurate and stable temperature readings I2C interface for easy communication with microcontrollers Low-power operation, suitable for battery-powered projects Wide operating temperature range for versatile applications Compatible with Arduino, ESP32, Raspberry Pi, and other boards Compact breakout board for quick prototyping and integration Board Dimensions TMP117 Temperature Sensor Breakout to Arduino I2C Connection

A3967 Stepper Motor Driver This A3967 Stepper Motor Driver For Arduino is the most recent version of EasyDriver v44, which was created in collaboration with Brian Schmalz. When compared to previous versions, it offers more flexibility and control over your stepper motor . It is a simple stepper motor driver that is compatible with most microcontrollers and capable of producing a digital 0 to 5V pulse (0 to 3.3V pulse if you solder SJ2 closed on the EasyDriver). A 7V to 30V power supply is required for the module's motor. The digital interface is powered by an onboard voltage regulator that can be set to 5V or 3.3V. The A3967 is a full-featured microstepping motor driver with an integrated transistor. It is intended for use with bipolar stepper motors in full-, half-, quarter-, and eighth-step modes, with output drive capabilities of 30 V and 750 mA. The A3967 comes with a fixed off-time current regulator that can operate in slow, fast, or mixed current-decay modes. This current-decay control scheme produces less audible motor noise, higher step accuracy, and lower power dissipation. The transistor is essential to the A3967's simple implementation. Simply sending one pulse to the STEP input causes the motor to move one step (full, half, quarter, or eighth depending on two logic inputs). It is not necessary to programme phase-sequence tables, high-frequency control lines, or complex interfaces. The A3967 interface is ideal for applications where a complex P is either unavailable or overburdened. Features: A3967 microstepping driver Adjustable current control from 150mA/phase to 750mA/phase MS1 and MS2 pins are broken out to change microstepping resolution to full, half, quarter and eighth steps (defaults to eighth) Compatible with 4, 6, and 8-wire stepper motors of any voltage Breadboard-compatible pins.

ACEBOTT ESP32 Intelligent Transportation STEM Kit Compatible with Arduino The ACEBOTT ESP32 Intelligent Transportation STEM Kit is designed for kids aged 8+, offering an easy and fun introduction to programming with the ESP32 controller board. It allows children to build and interact with robots, learning the basics of programming while boosting creativity. Perfect for family bonding, the kit supports three smart scenarios: smart lighting, entertainment, and temperature control. It also includes 90 minutes of teaching materials and courses that cover everything from basics to advanced topics. A great gift for kids aged 8-16, it blends education with fun and sparks interest in programming and engineering. Features Designed for kids aged 8+ to learn programming with the ESP32 controller board. Offers hands-on projects that combine education and creativity. Supports smart scenarios like lighting, entertainment, and temperature control. Includes 90 minutes of teaching materials and courses from basic to advanced levels. Promotes family bonding through collaborative STEM activities. Ideal gift for kids aged 8-16, sparking interest in programming and engineering. Applications Coding Education: Helps children improve their logic, basic programming skills, and problem-solving abilities by coding through Arduino IDE. Abundant Tutorials: Step-by-step instructions and preset coding files guide users in building and programming robots using ACEBOTT Scratch or Arduino IDE. Teacher Support: Provides 16 class hours of teaching content, complete with textbooks and PPT, reducing teachers' workload while supporting large class teaching.

ACEBOTT QE028 SharkBot Smart Car Kit Compatible with Arduino, Python, & ACECode The ACEBOTT QE028 SharkBot Smart Car Kit is an advanced AI-powered robotic car built around the high-performance ESP32-S3 controller, offering seamless compatibility with Arduino, Python, and ACECode. Designed for both beginners and robotics enthusiasts, SharkBot combines offline voice recognition, 4-way line tracking, obstacle avoidance, and precise N20 motor control to deliver a complete hands-on STEM learning experience. Its modular design allows easy expansion via I2C and servo ports, enabling the addition of sensors, actuators, and AI modules. Users can control SharkBot through Wi-Fi, infrared remote, or a dedicated mobile app, while customizable RGB lights bring interactive visual feedback to every movement. With built-in battery monitoring and fast Type-C charging, SharkBot ensures uninterrupted exploration and creativity in robotics. ACEBOTT QE028 SharkBot Smart Car Kit Assembly Guide Features: Offline voice recognition (customizable voice commands with ACECode) 4 Way Line Tracking and Obstacle Avoidance Infrared Remote Control with Battery Level Display I2C and servo expansion ports allow for endless customization.

ACEBOTT ESP32 IOT Weather Station Starter STEM Kit Compatible with Arduino The ESP32 IoT Weather Station Starter STEM Kit is a smart and hands-on way to learn about weather monitoring and programming. Powered by ESP32 IoT technology, this kit allows real-time weather tracking, helping you understand the application of technology in daily life. It includes 8 sensors to monitor light, UV, atmospheric pressure, raindrops, PM2.5, wind speed, temperature, humidity, and ground vibration, making it ideal for both indoor and outdoor use. The kit features strong endurance with a solar charging panel to power the battery, ensuring long-term observation. It also comes with rich teaching resources, including web and app control, along with 16 engaging courses to help you easily get started. Perfect for beginners and experienced makers, this kit makes an excellent gift for any STEM enthusiast. ACEBOTT ESP32 IOT Weather Station Starter STEM Kit Assembly Guide Weather Station Kit Functions Weather Station Kit Advantages Features Real-time weather monitoring using ESP32 IoT technology. 8 sensors for monitoring light, UV, atmospheric pressure, raindrops, PM2.5, wind speed, temperature, humidity, and ground vibration. Solar charging panel for long-lasting power and efficient energy conversion. Web and app control with ACECODE graphical mobile programming. 16 detailed courses to make learning easy and fun. Ideal for both beginners and experienced makers. Perfect STEM gift for holidays, birthdays, or educational use.

ADIY UNO KIT FOR BEGINNERS ( Make in India Boards) ADIY Uno R3 Beginners Kit is the perfect solution for individuals keen on learning about electronics and creating hands-on projects. This comprehensive starter kit includes 18 sensor modules, such as IR Sensor, Buzzer, DHT11, and more, ensuring endless possibilities for exploration and learning. The kit features the user-friendly ADIY Uno DIP R3 – Compatible (CH340C), fully compatible with Arduino UNO, allowing seamless programming for beginners. The kit guarantees the highest quality and durability. The user-friendly design, along with tutorial videos, makes it easy for beginners to get started with Arduino programming. Ideal for students and enthusiasts, this kit is a DIY solution for innovators looking to delve into the world of electronics. Features: Comprehensive starter kit with 18 sensor modules Sensor modules include IR Sensor, Buzzer, DHT11, and more User-friendly design for beginners Seamless programming with Arduino IDE software Ideal for students and enthusiasts DIY solution for innovators exploring electronics Applications: Educational Projects: Ideal for students learning about electronics and programming with hands-on projects. Prototyping: Enables enthusiasts to create prototypes for various electronic devices and systems. Sensor Exploration: Allows users to explore and experiment with a variety of sensors, such as IR sensors, DHT11, and gas sensors. DIY Electronics: Suitable for individuals interested in do-it-yourself (DIY) electronics projects and innovations. Arduino Programming Practice: Provides a platform for practicing Arduino programming skills seamlessly. Learning Electronics Fundamentals: Aids in understanding basic electronics concepts through practical applications. Home Automation Prototyping: This can be used to prototype simple home automation projects using the included components. Electronic Hobbyist Exploration: Appeals to hobbyists looking to explore and experiment with various electronic components.

Official ARDUINO Ethernet SHIELD 2 The Official Arduino Ethernet Shield 2 is the ideal solution for connecting your Arduino board to the internet with ease and speed. Designed to integrate seamlessly, this shield simply plugs onto your Arduino board and connects via an RJ45 Ethernet cable (not included). Powered by the reliable W5500 Ethernet controller with a built-in 32K buffer, it supports fast and stable 10/100Mb connections. Operating at 5V through the Arduino board's supply and using the SPI port for communication, it ensures efficient and reliable networking. True to Arduino’s open-source philosophy, all aspects of the hardware, software, and documentation are fully available, empowering makers and developers to learn, modify, and innovate freely. Whether you're building a smart device or an IoT application, the Ethernet Shield 2 offers a robust foundation to bring your project online. The Shield also incorporates a reset controller, which ensures that the W5500 Ethernet module is properly reset upon power up. Previous Shield iterations were incompatible with the Mega and required a manual reset after power-up. The current Arduino Shield has a Power over Ethernet (PoE) module that extracts power from a standard twisted-pair Category 5 Ethernet connection. The Shield features a conventional RJ45 Ethernet connection. The Shield's reset button resets both the W5500 and the Arduino board. The shield has a variety of information LEDs: ON: shows that the Board and Shield are powered. 13 is the Arduino standard built-in LED. The Shield flashes ACT when there is RX or TX activity, and LINK when a network link is active and data is transmitted or received. In this picture below we have tagged the yellow ACT, the green LINK, the 13 Built in LED and the ON LED. This shield also accommodates Tinkerkit-compatible connectors, as follows: TinkerKit connections for two Analog Inputs (white) are connected to A2 and A3. Two TinkerKit connectors for two Analog Outputs (orange in the middle) are connected to PWM outputs on pins D5 and D6. Two TinkerKit connectors for the TWI interface (white with four pins), one for input and the other for output. Features: Operating Voltage: 5V (powered directly from the Arduino board) Ethernet Controller: W5500 chip with an internal 32KB buffer for reliable data handling Connection Speed: Supports both 10Mb and 100Mb Ethernet connections Communication Interface: Connects to Arduino using the SPI (Serial Peripheral Interface) port