SmartElex 5V 2A LMR51420 DC Buck Boost Converter Module The SmartElex 5V 2A LMR51420 DC Buck Boost Converter Module is a compact power management solution designed to provide a stable 5V output even when the input voltage varies above or below the required level. It helps solve common power issues in electronic projects where input sources such as batteries or adapters are not consistent. This module is suitable for students, makers, engineers, educators, and startups who need a reliable and efficient way to power embedded systems, development boards, and electronic circuits without complex power design. This DC buck boost converter is well suited for robotics, IoT devices, automation systems, and portable electronics that require steady 5V power under changing load or input conditions. It can be easily used alongside platforms like Arduino, Raspberry Pi, and ESP32 to power controllers, sensors, and communication modules. The compact form factor and dependable performance make it easy to integrate into both prototypes and final products, helping users build stable systems with minimal effort Notes: High Efficiency: Efficient Conversion: High efficiency ensures minimal energy loss, making it ideal for battery-powered applications. Compact & Easy Integration: Small size allows seamless integration into circuits. Advanced Protection: Features overcurrent and thermal protections to ensure device and module safety. Low Ripple Output: Produces 5V DC output, essential for sensitive components. Features: Compact module design for easy integration into electronic circuits Delivers a clean and stable 5V output with low ripple High switching frequency enables fast response and efficient operation Wide input voltage support for flexible power sources Fixed 5V output ideal for 5V-based electronics Applications: Battery-powered and portable electronic devices IoT and embedded systems using microcontrollers and sensors 5V LED lighting and indicator circuits Custom power supply units requiring regulated 5V output Wearables and compact embedded projects

SmartElex 5V 3A 2 Channel Signal Relay Module The SmartElex 5V 3A 2 Channel Signal Relay Module is a dependable 2-Channel Relay Module designed to switch and control multiple medium-power devices with precision. Powered by a stable 5V relay module design, it uses two JY4100F-S-DC5V-C relays, each rated to handle 3A at 120V AC or 24V DC, ensuring exact and consistent switching performance. Its core function is to provide electrically isolated control between low-voltage microcontrollers and higher-voltage loads, making it safe and efficient for real-world applications. With onboard LED indicators, protective circuitry, and seamless compatibility with Arduino, Raspberry Pi, and ESP32, this module is a practical choice for automation systems, IoT solutions, and smart control projects. Applications: Smart home systems have dual device control. Dual motor or light control in automation. IoT initiatives require various device management. robotics, alarms, and security systems. Industrial process control Cautions: Provide a good 5V regulated supply. Do not exceed the rated voltage and current for contacts. Use isolation techniques for high voltage connections. Prevent moisture and dust collection on the PCB. Features: A dual-channel relay module may control two loads. 5V DC operating voltage allows for simple integration. Each channel can switch up to 3A at 120V AC or 24V DC. Ideal for microcontrollers such as the Arduino, Raspberry Pi, and ESP32. Quick response time: ≤10 ms operation and ≤5 ms release. Low power usage (`0.36W each channel, ~0.72W overall). Includes status LEDs for each channel. High insulation resistance (≥100 MΩ) ensures safety and reliability. Built-in safety features ensure safe operation. The operating temperature range is -40°C to +85°C for durability.

SmartElex 5V 3A 4 Channel Signal Relay Module The SmartElex 5V 3A 4 Channel Signal Relay Module is a compact and reliable 4 Channel Relay Module designed to control four independent medium-power loads with precision. Powered as a 5V relay module, it integrates high-quality JY4100F-S-DC5V-C relays, each capable of switching up to 3A at 120V AC or 24V DC. With dedicated trigger inputs and LED status indicators for every channel, it allows easy monitoring and accurate switching. This module directly interfaces with popular microcontrollers such as Arduino, ESP8266, and Raspberry Pi, making it ideal for IoT, home automation, and embedded control applications where safety, isolation, and consistent performance are essential. Applications: Home automation (controlled lights, fans, and locks) Industrial machine control IoT multi-device projects. Robotics and Motor Control Security systems and alarms. Cautions: Always utilize a properly regulated 5V power supply. Avoid exceeding the rated load capacity. Provide proper isolation for AC loads. Store the module in a dry, clean place. Features: Four-channel relay module allows for independent control of four devices. Operates at 5V DC and has an active LOW/HIGH trigger. Each relay can handle up to 3A at 120V AC or 24V DC. Compatible with Arduino, ESP8266, Raspberry Pi, and more platforms. Each channel has its own set of LED indicators. Fast switching: ≤10 ms operation and ≤5 ms release time. Low contact resistance (≤100 mΩ) ensures effective operation. The total power consumption is around 1.44W over four channels. High insulation resistance and dielectric strength are essential for safety. Wide operational temperature range (-40°C to +85°C).

SmartElex 5V 3A 8 Channel Signal Relay Module The SmartElex 5V 3A 8 Channel Signal Relay Module is a dependable switching solution built to control multiple electrical devices with precision. This 8 Channel Relay Module features eight JY4100F-S-DC5V-C relays, each capable of safely switching loads up to 3A at 120V AC or 24V DC. Designed to operate on a stable 5V supply, it offers individual input triggers and LED indicators for real-time status visibility. With strong electrical isolation and seamless compatibility with Arduino, ESP32, and Raspberry Pi, this 5V relay module is well-suited for automation panels, IoT systems, and complex control applications where reliable multi-channel switching is essential. Applications: Smart home automation (e.g., managing several appliances) Complex industrial automation systems. Robotics projects require several actuators. IoT systems have several relay outputs. Alarms, security, and access control panels Cautions: Use a well regulated 5V supply with adequate current (at least 1A suggested). Ensure that relay load restrictions are not exceeded. To avoid electrical dangers, securely isolate all AC wiring. Maintain a dry, clean, and dust-free atmosphere. Features: An 8-channel relay module with individual control. It operates at 5V DC and has active LOW/HIGH triggers. Each relay can handle 3A at 120V AC or 24V DC. Compatible with Arduino, ESP32, Raspberry Pi, and more platforms. Status LEDs for each channel are used to monitor operation. Fast switching: ≤10 ms operation and ≤5 ms release. Contact resistance of ≤100 mΩ enables stable conductivity. Total power usage is around 2.88W across all channels. High insulation resistance and dielectric strength are essential for safety. Suitable for -40°C to +85°C temperatures.

SmartElex 5V/3.3V Power Supply Stick with ON/OFF Switch The SmartElex 5V/3.3V Power Supply Stick with ON/OFF Switch is a compact and efficient regulated power supply module designed to provide reliable power for breadboard-based electronics and prototyping projects. It operates on a 6–12V DC input and delivers a stable, selectable 5V or 3.3V output, making it ideal for powering microcontrollers, sensors, and logic modules. This power supply module features an onboard ON/OFF switch for easy control, a voltage selection switch for flexibility, and a power LED for real-time status indication. To ensure safe operation, it is equipped with a PTC fuse that protects against overcurrent, helping safeguard both the connected components and the module itself. Features: 6-12V input through barrel jack or 2-pin header. The output voltage can be controlled to either 3.3V or 5V. 800mA of operational current. An ON/OFF switch allows for convenient control. Voltage selection switch for 3.3V/5V output. The power status LED provides visual indication. PTC fuse protection against overloads. Breadboard-friendly headers have a 0.1" pitch for simple insertion.

SmartElex 74HC595 Shift Register Breakout Module The SmartElex 74HC595 Shift Register Breakout Module is a practical solution for expanding digital outputs while using minimal microcontroller pins. This shift register board uses the SOIC version of the 74HC595 IC to clock serial data and latch it into stable parallel outputs, making it perfect for LED control, motor drivers, and other digital applications. With all pins of the 74HC595 IC breakout accessible through standard 0.1″ headers, integration into breadboards or PCBs is simple. The thoughtfully placed Serial In and Serial Out pins allow easy cascading of multiple boards, enabling scalable I/O expansion without complex wiring. Features: The 74HC595 Shift Register IC allows for easy extension of I/O pins on microcontrollers. Data Clocking and Latching: Effectively handle multiple outputs with little I/O use. Standard 0.1" headers provide easy integration with access to all pins. Chaining Capability: The serial in and out pins allow many boards to be connected together. Compact Design: A plan that saves space and is suitable for a variety of applications. Versatile Applications: Suitable for controlling LEDs, motors, and other devices.

SmartElex 9V-12V DC XR2206 High Precision Signal Generator SmartElex 9V–12V DC XR2206 High Precision Signal Generator is a versatile waveform source designed to generate stable and accurate test signals for electronic circuits. This signal generator is ideal for students, hobbyists, engineers, educators, and startups who need a reliable way to produce reference signals for circuit testing, audio development, oscilloscope calibration, or general laboratory experimentation. It helps users troubleshoot, prototype, and validate designs without the need for expensive benchtop function generators, making it a practical tool for learning and development environments. Powered by the XR2206 IC, this XR2206 function generator can be used for robotics, IoT systems, automation equipment, audio testing, and embedded electronics where controlled waveform inputs are required. It works well alongside microcontroller platforms like Arduino, Raspberry Pi, and ESP32 as a standalone signal source to simulate inputs and support performance tuning. With its adjustable parameters and dependable output, it provides an accessible way to strengthen understanding of signal behavior, frequency control, and waveform characteristics during hands-on project work. Features: Generates multiple waveform types for testing and experimentation Based on the XR2206 IC for stable, high-precision signal output Adjustable frequency and waveform settings for versatile use Suitable for circuit debugging, oscilloscope calibration, and audio testing Works as a standalone tool or alongside Arduino, Raspberry Pi, and ESP32 Ideal for labs, classrooms, prototyping, and embedded development projects

SmartElex ACS37800 Power Meter The SmartElex ACS37800 Power Meter is a compact and reliable power meter module designed for accurate DC power monitoring in high-current applications. Powered by the Allegro MicroSystems ACS37800 power monitoring IC, it precisely measures voltages up to 60V DC and currents up to 30A, making it ideal for systems like 3D printers, UAV battery packs, battery charging circuits, and solar or photovoltaic setups. Its Hall-effect-based, galvanically isolated sensing technology ensures reinforced electrical isolation without the losses of shunt resistors or bulky transformers. This power meter provides real-time access to key electrical parameters through a digital interface and includes advanced features such as overcurrent detection, voltage fault reporting, zero-crossing detection, and user-configurable settings stored in on-chip EEPROM—delivering safe, efficient, and accurate power monitoring for modern electronic systems. Important note: The ACS37800's current channel has +/-0.1A RMS noise, making it unsuitable for low current applications. Sensing less than one amp? This is not the right product for you. Safety Information: Although the ACS37800 power monitoring IC can monitor AC power at high line voltages, the SparkX Power Meter is only suitable for Safety Extra Low Voltage (SELV) applications of up to 60VDC. Its usage in alternating current power systems is neither advised nor condoned. Features: Allegro MicroSystems ACS 37800 0.85 mΩ primary conductor resistance ensures little power loss. 1 kHz bandwidth. Current detecting range is up to +/- 30 A. Default I2C address is 0x60. Voltage channel RMS noise: +/-0.3 mV Current channel RMS noise is +/-0.1A. Voltage channel total output error is +/-1% (-40°C to 125°C). Current channel total output inaccuracy is +/-2% (25°C to 125°C). Current channel total output error is +/-2.7% (-40°C to 25°C). Two 0.25" (6mm) through holes for high-current connections.

SmartElex AHT20 Temperature and Humidity Sensor The SmartElex AHT20 Temperature and Humidity Sensor is a compact and reliable temperature and humidity sensor designed for accurate digital environmental measurement. It helps users monitor ambient conditions such as temperature and humidity with consistent output, making it suitable for students, makers, educators, and engineers working on sensing and monitoring projects. This digital temperature and humidity sensor simplifies data collection and is ideal for learning, testing, and early-stage product development without complex hardware design. This temperature sensor module is widely used in IoT applications, automation systems, robotics projects, and environmental monitoring setups where dependable readings are required. It integrates easily with popular platforms like Arduino, Raspberry Pi, and ESP32, allowing quick setup and smooth communication for prototyping and experimentation. With stable performance and easy integration, the SmartElex AHT20 sensor is a practical choice for educational labs, DIY electronics, and startup projects focused on real-world sensing applications. Features: Digital temperature and humidity sensor with stable readings Compact temperature sensor module for easy integration Simple digital interface for reliable data communication Compatible with Arduino, Raspberry Pi, and ESP32 boards Ideal for IoT, automation, and environmental monitoring Suitable for education, prototyping, and DIY electronics projects

SmartElex Ai-Thinker RD-01 Radar Module with Wi-Fi and BLE The SmartElex Ai-Thinker RD-01 Radar Module with Wi-Fi and BLE is a compact radar module designed for reliable human presence detection and motion sensing. It uses radar-based technology to detect activity without relying on cameras or physical contact, making it suitable for students, makers, engineers, and educators working on smart automation, security devices, or intelligent monitoring systems. This radar sensor module is an excellent choice for projects that require precise presence detection in homes, offices, and industrial environments without compromising privacy. This human presence radar sensor is widely used in IoT devices, smart lighting, occupancy monitoring, robotics, energy-saving automation, and safety applications. It integrates smoothly with platforms like Arduino, Raspberry Pi, and ESP32, enabling easy connectivity and communication through Wi-Fi and BLE for real-time data transmission and remote monitoring. With dependable sensing performance and flexible integration options, the SmartElex Ai-Thinker RD-01 Radar Module is ideal for prototyping, product testing, and developing smart environments where accurate motion detection and wireless communication are essential. Features: Radar-based human presence and motion detection sensor Works without cameras for improved privacy and reliability Wi-Fi and BLE connectivity for wireless data communication Compatible with Arduino, Raspberry Pi, ESP32, and IoT platforms Ideal for smart lighting, security systems, and automation projects Suitable for prototyping, home automation, and smart monitoring solutions