DFRobot Gravity UART Fiber Optic Transceiver Module The Gravity UART Fiber Optic Transceiver Module is a revolutionary solution for anyone struggling with traditional shielded twisted pair cables for remote signal transmission. This advanced fiber optic communication module eliminates the need to reduce baud rates for transmission stability, consistently operating at 2000000 baud within distances up to 10km. The module provides complete electrical isolation, effectively preventing electromagnetic interference that commonly affects copper-based communication systems. With its built-in lightning protection, this UART transceiver module offers superior reliability and safety, even in environments prone to electrical surges and can share cable trunking with strong power lines without signal degradation. What makes this module particularly valuable is its ability to deliver interference-free communication at half the price of traditional shielded twisted pair solutions. The Gravity: UART Fiber Optic Transceiver Module uses single-mode fiber with an SC interface operating at 1310nm wavelength, ensuring optimal performance in various applications. It can be paired with a passive optical splitter to create one-to-many star networking configurations, making it incredibly versatile for complex communication systems. Whether you're working on industrial automation, remote sensing, or any project requiring reliable long-distance data transmission, this module provides a cost-effective solution that overcomes the limitations of conventional copper-based communication methods while maintaining signal integrity across considerable distances. Features Supply voltage range: 3.3V to 5V for compatibility with various systems. Signal voltage range: 3.3V to 5V for flexible integration. Maximum communication speed: 2000000 baud for high-speed data transfer. Communication distance: Up to 10km without signal degradation. Operating wavelength: 1310nm for optimal fiber optic performance. Fiber optic type: Single mode for long-distance applications. Fiber optic interface: SC connector for industry-standard compatibility. Operating temperature range: 0°C to 70°C for various environments. Emits invisible infrared laser (1310nm) - avoid direct eye exposure. Pinout Diagram Name Description Gravity: UART UART interface, connect to MCU or sensor PWR LED Power indicator, turns ON when powered on SD LED Indicator for optical fiber disconnection, lights up when disconnection is detected TX LED Indicator for fiber optic transmitting, blinks when transmitting signal RX LED Indicator for fiber optic receiving, blinks when receiving signal SC Fiber Optic Interface Connect to SC fiber optic interface

DFRobot Gravity V2.0 Serial Data Logger for Arduino The DFRobot Gravity V2.0 Serial Data Logger for Arduino offers a simple and efficient solution for storing data in Arduino-based projects. Unlike traditional MicroSD card modules, this logger comes with 128MB of onboard flash memory, eliminating the need for external TF cards. This feature makes data storage more convenient, as you no longer need to worry about swapping or managing additional memory cards. Equipped with USB functionality, the module allows you to directly connect it to a PC for easy file retrieval without the need for a card reader. The onboard LED indicator gives a visual representation of the data writing status, making it easy to monitor the logger’s operation. Additionally, the SAVE button allows you to store data into separate files, providing a more organized and manageable approach to data logging. This DFRobot  Arduino makes the Gravity V2.0 Serial Data Logger an ideal tool for projects requiring reliable and efficient data storage. The Upgraded V2.0 Version Compared to V1.0 Version: Supports storage in TXT and CSV file formats for better file management. Significantly improves startup time and runtime stability for smoother performance. Supports scheduled creation of files for more flexible and organized data storage. Added USB port to make reading files more convenient, eliminating the need for a card reader. DFRobot Gravity V2.0 Serial Data Logger With Arduino Circuit Diagram Features USB function for easy file access, no card reader required Onboard 128MB Flash memory, eliminating the need for a TF card Supports multiple baud rates, ensuring good compatibility with various devices LED indicator to visually display data writing status Supports storage in TXT and CSV file formats for better file organization Supports scheduled creation of files for more flexible and efficient data storage Applications Offline data collection Capture product log grab Robots and drones debug

DFRobot LattePanda 3 Delta 864 Windows/Linux Single Board Computer 8GB/64GB eMMC with Activation Code(Windows 10 IoT Enterprise) The LattePanda 3 Delta 864 is a powerful little computer, small enough to fit in your palm but strong enough for serious work and cool projects. Think of it as a full computer, but tiny! It's built around the impressive Intel N5105 SBC (Single Board Computer) chip, which is much faster than older models, making everything from browsing to coding and even some gaming feel quick and smooth. Whether you're a student building a robot, a hobbyist creating a smart home device, or a shop owner needing a compact system for display or automation, this tiny machine is surprisingly capable. You can choose to run Windows (it even comes with Windows 10 ready, and supports Windows 11) or your favorite Linux version on this versatile Windows Linux SBC. With 8GB of fast LPDDR4 RAM, you can open many apps at once without slowdowns, and the 64GB eMMC storage gives you a good amount of space for your software and projects. Plus, it has the latest Wi-Fi 6 for fast wireless internet, a very speedy 2.5G Ethernet port for wired connections, and can even show amazing 4K video on two screens at the same time using HDMI and USB-C. It’s a fantastic Pocket Single Board Computer packed with features. Pocket Size The ultra-slim and pocket size of the LattePanda 3 Delta Windows 10 single board computer allows for integration into space-constrained devices, delivering powerful computation without occupying much space. Rich Expandable Interfaces This industrial single-board computer is equipped with a multitude of interfaces, such as USB, HDMI, RS232, GPIO, Ethernet, eDP, and more. These versatile interfaces cater to a diverse range of industry demands. In addition, LattePanda 3 Delta x86 SBC features M.2 B Key and M.2 M Key slots, allowing for the expansion of M.2 NVMe or SATA SSDs as well as 4G/5G communication modules. Features Processor: Intel Celeron N5105 (Quad-Core, up to 2.9GHz). Graphics: Intel UHD Graphics (450 – 800MHz). Memory (RAM): 8GB LPDDR4 (2933MHz). Storage: 64GB eMMC V5.1. Wireless: Wi-Fi 6 (Intel AX201, 2.4GHz & 5GHz). Bluetooth: Version 5.2 (part of Wi-Fi module). Ethernet: 1x RJ45 port (2.5 Gigabit Ethernet). Video Output: HDMI 2.0b, USB Type-C (DisplayPort), eDP. USB Ports: 2x USB 3.2 Gen1, 1x USB 3.2 Gen2, 1x USB Type-C (supports PD, DP, USB). Co-processor: Arduino ATmega32U4 for controlling sensors/motors. Expansion Slots: M.2 M Key (for NVMe/SATA SSD), M.2 B Key (for 4G/5G module or SATA SSD). Supported OS: Windows 10 (pre-installed option), Windows 11, Linux. Power Input: USB Type-C PD (Power Delivery).

DFRobot M.2 (A+E Key) to Gigabit Ethernet Module for LattePanda Alpha and Delta The M.2 (A+E Key) to Gigabit Ethernet Module for LattePanda Alpha and Delta (FIT0798) is a versatile M.2 network module designed to add RJ45 Gigabit Ethernet functionality through the M.2 slot of your LattePanda controller. This high-performance Gigabit Ethernet adapter supports both IEEE 802.3u standard 10/100Mbps Ethernet and IEEE 802.3ab standard 1000Mbps Ethernet, making it compatible with various network environments. The module features an automatic auxiliary power detection function that automatically configures the relevant bits of the PCI power supply management register in the PCI configuration space. This intelligent feature ensures optimal power management while providing reliable network connectivity for your projects and applications. Built around the Realtek RTL8111F chip, this LattePanda expansion card delivers superior performance with higher data transmission rates and lower power consumption compared to standard network adapters. The module offers excellent stability and compatibility, with the M.2 interface providing transmission speeds up to 2.5Gb/s, while the gigabit network interface supports 10/100/1000Mbps self-adaptive data rates. With its plug-and-play functionality, fast data transmission, and convenient connection options, this RJ45 port converter is particularly well-suited for LattePanda users looking to convert their M.2 slot into a Gigabit Ethernet interface. Whether you need network port expansion or want to implement soft routing capabilities, this module provides a simple and effective solution for enhancing your LattePanda's connectivity options. Features Applicable Network Type: Fast Ethernet with 10/100/1000Mbps self-adaptive transmission rate. Interface: NGFF (M2) Key A+E for direct connection to compatible LattePanda boards. Network Interface: Standard RJ45 port for universal network connectivity. Main Chip: Realtek RTL8111F for reliable and efficient performance. Transmission Rate: M.2 interface at 2.5Gb/s for high-speed data transfer. Plug-and-play design for easy installation without additional drivers. Compact size for space-efficient integration with your LattePanda system.

DFRobot micro:Driver - micro:bit Driver Expansion Board The micro:Driver Expansion Board is the perfect companion for your micro:bit, UNIHIKER M10, or K10 microcontroller. This versatile micro:bit driver expansion board uses an I2C external drive chip to control motors and servos while occupying only two I2C pins, leaving other resources free for your project. With the HR8833 motor driver chip providing up to 1.5A continuous current, you can easily power small motors and N20 mini metal motors for your robotics projects. The board features helpful positive and negative rotation indicators, making it simple for students and makers to identify motor direction. This powerful STEM robotics accessory not only extends your micro:bit's capabilities with 9 GPIO interfaces but also provides 4 motor drives and 8 servo interfaces. The extended GPIO and servo interfaces use the DFRobot-Gravity standard, supporting numerous modules and sensors. Servo interfaces connect directly to the Vin power supply, providing enough current to run multiple servos simultaneously. With support for 3.5V to 5.5V power through a DC 2.1 plug or wiring terminal, this servo controller board can be powered by three dry batteries or a power bank using the included USB to DC 2.1 adapter cable. Features I2C external drive chip controls motors and servos using only two pins HR8833 motor driver with 1.5A maximum continuous operating current 4-way motor drives or 2-way stepper motor drives 8 servo interfaces with direct connection to Vin power supply 9 micro:bit onboard GPIO interfaces (P0, P1, P2, P8, P12, P13, P14, P15, P16) DFRobot-Gravity standard interface for modules and sensors Power supply range: 3.5V to 5.5V DC 2.1 plug and wiring terminal for flexible power options

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 MP2636 Power Booster & Charger Module The MP2636 Power Booster & Charger Module is a compact and versatile power management solution designed specifically for battery-powered projects. This all-in-one module combines a lithium battery charger, power path management, and a 5V boost converter in a single board measuring just 27.8×17.8mm. Perfect for students working on portable electronics or renewable energy projects, it supports charging from various sources including solar panels (0.3W-3W), USB power, or any DC source between 2.75V and 5.5V. The module features a stable 5V USB output that can deliver up to 1A current, making it ideal for powering microcontrollers, sensors, or even charging mobile devices. What makes this module particularly valuable for electronics enthusiasts is its comprehensive protection system and intelligent power management. The MP2636 chip automatically handles power path management, allowing simultaneous battery charging and system operation. It includes protection against overcharging, over-discharging, short circuits, and reverse polarity connection, ensuring your batteries and connected devices remain safe. The onboard status LEDs provide clear visual indicators for charging status and power output, making it easy to monitor system operation. Whether you're building a solar-powered weather station, a portable power bank, or adding battery backup to your Arduino project, this module offers a reliable and efficient power solution. Features Input voltage range: 2.75V to 5.5V DC for flexible power sourcing Compatible with 3.7V lithium batteries (18650, 14500, etc.) Maximum charging current: 1A with adjustable settings 5V/1A USB output for powering external devices Built-in protection: overcharge, over-discharge, short circuit protection Onboard status LEDs for charging and output indication Compact dimensions: 27.8×17.8mm for easy integration into projects

DFRobot Multi-output DC-DC Buck Converter Module (3.3V/5V/9V/12V) The DFRobot Multi-output DC-DC Buck Converter Module efficiently steps down 7.5V–30V input to selectable output voltages of 3.3V, 5V, 9V, or 12V (default 5V), making it ideal for projects requiring multiple power levels. Output voltage selection is simple—just short the corresponding pads on the back. Designed to handle up to 5A load current (with proper heat dissipation), it features built-in over-temperature and overload protection (triggered at 70°C). An onboard LED indicator provides real-time status—solid red for normal operation and off when protection is activated. This versatile power module is perfect for powering LEDs, robotics, drones, servos, and low-power motors in multi-voltage control systems. Instructions: The module defaults to 5V output, with the 5V solder pad short-circuited. To change the output voltage to other options like 3.3V, simply disconnect the 5V pad and short-circuit the 3.3V solder pad. Note: As this is a step-down converter, the input voltage must always be higher than the desired output. It operates best with a voltage difference of 2V or more. Note: The output parameters are measured at 25 ?, and the heat dissipation (heat sinks) is required for continuous large current load. Pinout Diagram: Dimensions Features: Converts input voltage of 7.5V–30V to selectable output voltages of 3.3V, 5V, 9V, or 12V Designed with efficient heat dissipation for stable performance Includes over-temperature and overload protection, activating at 70°C

DFRobot PiTray Mini for Raspberry Pi Compute Module 4 The PiTray mini is a versatile carrier board or breakout board designed specifically for the Raspberry Pi Compute Module 4 (CM4), offering a neat and budget-friendly solution for various applications. With the same outline and mounting holes as the Raspberry Pi Model B, it can be easily stacked with existing clusters, making it ideal for cluster computing projects. The breakout board takes advantage of CM4's benefits over the Raspberry Pi 4B in industrial settings - models with embedded eMMC storage provide more reliable and faster disk I/O, while variants without WiFi and Bluetooth chips offer improved energy efficiency as these modules can be disabled to save computing resources. This eMMC programming board serves as an excellent starter kit for CM4 users. It features a convenient eMMC boot switch that simplifies the process of flashing operating system images to eMMC, eliminating the need to figure out which pins to connect. The board also includes a microSD card socket to support CM4 Lite models that don't have onboard eMMC storage. Designed with a minimalist approach to fit the CM4 on a business card-sized carrier, the PiTray mini focuses on essential connections - one USB 2.0 port, a full-size HDMI connector, and HAT connectors that come directly from the chip. This streamlined design makes it an economical choice for HTPC makers, RetroPie enthusiasts, and regular Raspberry Pi users who need a similar experience to the Raspberry Pi Model B. Features Compatible with all Raspberry Pi Compute Module 4 variants (with or without eMMC) Same dimensions (85mm × 56mm) and mounting holes as Raspberry Pi Model B Standard HDMI 2.0 connector for display output Gigabit Ethernet RJ45 socket for network connectivity Native USB 2.0 connector for peripherals Boot Mode Switch for easy switching between programming and normal modes MicroSD card socket for CM4 variants without onboard eMMC storage\

DFRobot Portable Industrial USB Isolator with USB 2.0 Compatibility The Industrial USB Isolator is a compact, portable device that creates complete electrical separation between connected USB devices. With its impressive 2500V USB signal isolation capability and 12Mbps data transmission rate, this isolator effectively protects your USB ports from damage in harsh electrical environments. The device requires no external power source or driver installation, making it incredibly convenient to use - simply plug it in between your computer and USB device for immediate protection. This isolator not only safeguards your equipment but also extends the service life of your devices by preventing electrical damage that can occur in industrial settings. This versatile industrial USB protection device is ideal for environments with strong electrical interference or noise-sensitive applications. It works perfectly with USB debugging equipment and various industrial control USB devices where electrical isolation is critical. Beyond protection, the isolator can function as a USB repeater to extend your connection range or isolate low-voltage differences between upstream and downstream devices. Its compact design and robust USB signal isolation capabilities make it an essential tool for students working on electronics projects, industrial automation professionals, and anyone working with sensitive USB equipment that needs protection from electrical noise, ground loops, or voltage spikes. Features 12Mbps data transmission rate for efficient communication 2500V isolation voltage for superior protection Compatible with USB 2.0 standard for wide device compatibility No external power required - powered directly through USB connection Driver-free operation for true plug-and-play functionality Standard USB male input and female output connectors Suitable for operating environments from -40°C to 85°C Dimensions