25cm Multipurpose Engineering Measuring PCB Ruler The Multipurpose 25cm PCB Ruler is designed for electronics enthusiasts, makers, and PCB designers who need a versatile and information-packed measuring tool. Crafted from durable FR4 PCB material with high-quality R-4 gold-plating, this ruler offers exceptional hardness, wear resistance, and long-lasting performance. Its dual-scale layout allows accurate measuring in both millimeters and inches, making it suitable for PCB layout work, prototyping, and debugging. Beyond basic measurement, this 25cm ruler integrates a wide variety of PCB design references directly onto its surface. It includes angle gauges, IC pin spacing tables, SMD package outlines, resistor and capacitor chip sizing, hole diameter references, and trace-width guides. The addition of AWG drill hole sizing helps users compare wire thicknesses quickly during assembly. Whether you're designing circuits or troubleshooting, this all-in-one PCB ruler ensures you always have essential data at your fingertips. Features: 25cm (10-inch) multifunctional ruler featuring dual mm and inch scales for accurate measurement during PCB design and prototyping. Made from durable FR4 PCB material with R-4 gold plating and copper-etched markings for high hardness, long-lasting wear resistance, and premium finish. Includes essential PCB design references such as angle gauges, IC package information, pin spacing tables, and trace-width guides. Provides SMD package dimensions for resistors, capacitors, and other common components along with polarity and terminal identifiers. Features AWG drill-size chart, hole diameter references, and other handy guides, making it an essential tool for hobbyists, students, and engineers. Easy to carry and compact, offering a complete reference set in the size of a standard ruler. Ideal for PCB design, electronics prototyping, debugging, and educational use.

15cm Multipurpose PCB Measuring Ruler The 15cm Multipurpose PCB Ruler is a precision-engineered measuring tool designed specifically for electronics enthusiasts, PCB designers, and makers. Built from durable PCB material with copper etching and gold plating, this ruler provides excellent longevity and a premium feel. It offers dual-scale measurements in both millimeters and inches, allowing smooth workflow across different project requirements. More than just a ruler, it includes valuable PCB reference data such as IC package outlines, angle gauges, SMD component dimensions, pin spacing charts, AWG hole sizes, and polarity indicators. This compact tool fits easily into any toolkit and serves as a quick-access reference guide during PCB design, inspection, or debugging sessions. Whether you're designing circuits or checking component footprints, this multipurpose ruler makes your work more efficient and accurate. Features: 15cm (6-inch) dual-scale ruler with precise mm and inch markings. Made from high-quality, gold-plated PCB material for long durability. Includes common IC package guides such as SOP-32, SOP-24, SOP-20, SOP18, SOP16, and SOP14. Provides SMD package dimensions for capacitors, resistors, and other components. Compact, lightweight, and easy to carry in any electronics toolkit. Ideal multipurpose measuring tool for PCB design, prototyping, and debugging.

Multipurpose 20cm PCB Ruler – Engineering Measuring Tool The Multipurpose 20cm PCB Ruler is a versatile and durable measuring tool crafted specifically for electronics engineers and PCB designers. Built from strong PCB material with copper etching and gold plating, it offers excellent durability and long-lasting clarity. With dual-scale measurements in millimeters and inches, this extended 20cm ruler provides more workspace coverage, making it ideal for larger design measurements and technical tasks. Beyond measurement, it serves as an essential PCB reference guide, featuring IC package outlines such as SOP-32, SOP-24, SOP-20, SOP18, SOP16, and SOP14, along with SMD resistor/capacitor size charts, hole diameter references, pin spacing guides, and polarity markings. Whether you're prototyping, planning PCB layouts, or verifying component dimensions, this ruler helps streamline your workflow with quick, accurate, and readily available engineering data. Features: 20 cm (8-inch) dual-scale ruler with accurate millimeter and inch markings, offering reliable measurements for PCB design and electronics work. Crafted from durable, gold-plated PCB material, ensuring long-lasting clarity, corrosion resistance, and premium build quality. Includes essential IC package guides such as SOP-32, SOP-24, SOP-20, SOP18, SOP16, and SOP14, making it easier to verify component outlines during prototyping. Provides AWG hole references (28–8 AWG) along with commonly used hole diameter charts for quick and accurate mechanical checks. Features SMD package dimensions for resistors, capacitors, diodes, and other components, helping users confirm sizing during PCB layout. Lightweight, slim, and easy to carry, fitting comfortably in electronics toolkits, backpacks, or workbench drawers. Acts as a dependable multipurpose engineering ruler, ideal for PCB designing, circuit debugging, electronics education, and rapid component referencing.

SmartElex MSGEQ7 Audio Analyzer Module for Arduino – 7 Band Audio Spectrum Analyzer Board The SmartElex Audio Analyzer Module is a compact and powerful tool that helps you visualize sound in real time. Built around the MSGEQ7 chip, it splits audio input into seven different frequency bands, allowing you to create dynamic light and sound projects with ease. This 7-band audio spectrum analyzer module is perfect for hobbyists and makers who want to build sound-reactive LEDs, music visualizers, or equalizer displays. It works seamlessly with Arduino and other microcontrollers, letting you capture and display audio frequencies in a creative way. Whether you’re designing a sound visualiser module for microcontroller projects or adding a unique visual element to your DIY audio system, this board makes it simple and fun. With its easy setup and accurate response, it’s an excellent choice for audio enthusiasts and electronics learners alike. Features: 7 Frequency Bands: Built around the MSGEQ7 chip, it divides the audio signal into seven distinct frequency ranges for accurate analysis. Real-Time Audio Visualization: Ideal for building sound visualiser modules for microcontrollers and music-reactive projects. Compatible with Arduino and Other Boards: Works easily with Arduino, ESP32, and other microcontrollers for quick integration. Simple Input and Output Design: Just connect an audio input and read analog outputs from each frequency band. Compact and Ready to Use: Comes pre-assembled, making it beginner-friendly for DIY audio and electronic enthusiasts. Versatile Applications: Perfect for 7-band audio spectrum analyzer modules, LED equalizers, sound displays, and interactive art projects.

Metal Gear DC 3V-6V Single Axis TT Motor The DC 3V–6V Metal Gear Motor is a powerful and durable motor designed for robotics and intelligent vehicle applications. It features a 1:90 gear reduction ratio, allowing smooth operation with strong torque and a steady output speed of around 200–220 RPM. The all-metal gear construction ensures enhanced durability and longevity compared to traditional plastic gear motors, making it ideal for demanding science and hobby projects. This motor is perfect for DIY enthusiasts, students, and robotics developers who need reliable performance in compact designs. The bi-directional rotation and compatibility with smart car kits make it versatile for educational models, automation systems, and research experiments. With its efficient and low-power operation, this gear motor offers consistent performance under various voltage inputs between 3V and 6V DC. Features: Designed for robotics, smart cars, and intelligent vehicles requiring stable torque output. Operates efficiently between 3V–6V DC with a 1:90 speed reduction ratio for enhanced torque. Delivers 200–220 RPM output speed ideal for controlled and smooth movement. Built with all-metal gears for increased durability and extended operational life. Supports bi-directional rotation to suit various DIY and automation applications. Enclosed in a sturdy plastic shell that protects internal components from wear. Compact design makes it suitable for small-scale projects and embedded systems.

SmartElex 8 Channel Level Shifter – TXS0108E Bi-Directional Logic Converter Module The SmartElex 8 Channel Level Shifter is a compact and efficient module designed to safely convert signal voltages between devices operating at different logic levels. It’s based on the TXS0108E chip, which allows smooth and reliable communication between 3.3V and 5V systems. This 8 channel voltage level shifter is perfect for projects involving multiple sensors, microcontrollers, or communication modules that run on different voltage levels. It ensures your data signals are transmitted accurately without damaging sensitive components, making it ideal for Arduino, ESP32, Raspberry Pi, and other development boards. Compact, easy to use, and highly versatile, this level shifter module is an essential tool for hobbyists, students, and engineers working on IoT, robotics, and embedded electronics projects. It helps you bridge the voltage gap safely and efficiently between your digital circuits. Features: 8 Independent Channels: Safely shifts signal voltages on up to 8 separate data lines, perfect for multi-device communication. Bi-Directional Conversion: Allows two-way communication between 3.3V and 5V logic systems without signal loss. High-Speed Performance: Supports fast data transmission for I2C, SPI, UART, and other communication protocols. Compact and Easy to Use: Small, plug-and-play level shifter module ideal for breadboard and prototype setups. TXS0108E Based Design: Uses the reliable TXS0108E IC for stable and accurate voltage level translation. Wide Compatibility: Works with Arduino, ESP32, Raspberry Pi, and other microcontrollers or sensors using different logic levels.

SmartElex MAX98357A I2S Audio Breakout Amplifier for Raspberry Pi and Microcontrollers The SmartElex MAX98357A I2S Audio Breakout is a compact digital audio amplifier that delivers clear and powerful sound for your Raspberry Pi or microcontroller projects. It converts I2S digital signals directly into high-quality analog audio output, eliminating the need for a DAC. With up to 3.2W output power, adjustable gain settings, and efficient Class D amplification, this breakout board is perfect for portable and battery-powered audio setups. It’s a reliable choice for DIY audio enthusiasts looking for an easy-to-use breakout board or a high-performance USB to serial converter alternative in digital sound applications. Features: Powered by the MAX98357A Class D amplifier chip for superior sound clarity and efficiency. Supports I2S digital audio input without needing an MCLK signal. Provides up to 3.2W output power at 4Ω with 5V supply, ideal for small speakers. Adjustable gain levels from 3dB to 15dB for flexible volume control. Integrated click-and-pop suppression ensures clean, noise-free playback. Built-in thermal shutdown and short-circuit protection for safe operation. Compact and lightweight design makes it ideal for portable projects.

SmartElex HX711 Load Cell Amplifier - High Precision Weight Sensor Module The SmartElex HX711 Load Cell Amplifier is a compact and efficient breakout board designed to interface load cells with microcontrollers. It allows you to easily measure weight and force by converting small resistance changes from the load cell into readable digital values. Perfect for building digital weighing scales, industrial automation systems, and DIY measurement projects, this load cell amplifier offers high accuracy and stability even in demanding environments. With separate analog and digital power supplies, integrated filtering components, and a simple two-wire communication interface, the HX711 breakout board ensures reliable and noise-free readings. Compatible with most microcontrollers like Arduino, ESP32, and Raspberry Pi, it provides an affordable and easy-to-use solution for any weight-sensing application. Whether you’re developing a custom scale or a smart monitoring system, this module makes precision measurement simpler than ever. Features: Uses HX711 24-bit precision ADC for accurate load cell readings. Operates between 2.7V–5V, suitable for 3.3V and 5V systems. Extremely low operating current of less than 1.5mA. Selectable 10SPS or 80SPS data output rates for flexible performance. Simultaneous rejection of 50Hz and 60Hz noise for stable readings. Compatible with Arduino, ESP32, Raspberry Pi, and other microcontrollers. Includes analog-digital separation, filter capacitor, and inductor for improved signal quality.

SmartElex Battle Relay Module The SmartElex Battle Relay Module is a reliable and high-performance battle relay designed to handle high-current applications up to 10A. It allows seamless radio-controlled switching for devices like BattleBots, RC aircraft, cars, boats, and lighting systems. Built for durability and ease of use, this high current relay module features robust screw terminals for secure connections and includes both Status and Power LEDs for better visibility of operation. With full electrical isolation from receiver electronics, it enables users to control systems with voltage levels as high as 240VAC—no need to worry about microcontroller logic or transistor complexities. Whether you’re building a combat robot or a custom RC system, the SmartElex Battle Relay ensures dependable performance and smooth control. Applications: In RC combat, you can control powerful supplementary weapons. Glow plugs operate RC nitro cars. High-powered lighting systems control huge RC aircraft, boats, and automobiles. Controlling domestic appliances and home automation systems. Glow wire is an example of non-critical automotive electronics control. Features: Maximum current and voltage: 10A at 125 VAC & 7A @ 240VAC 30mA is the normal pull from receiver. Dual Channels means it can run two brush motors separately or together. At room temperature, it supports a maximum current of 7A. Connection Diagram: