Dual 4-bit Decade Ripple Counter IC - 74HC390

TL-Smoother module for 3D printer motor drivers V1.0 A smoother module for stepper driver motor is an add-on module for stepper motors of 3D Printers. It is useful for a softer movement in Delta Style 3D Printer as when using DVR8825 or step and drives and A4988/2 driver unit. TL smoothers are popular little printed circuit boards (PCBs) that are often used in FDM 3D printers to not surprisingly, smooth out the look of prints. In other words, they reduce surface artifacts caused by irregular stepper motor motion, often dubbed “zebra stripes,” “salmon skin,” etc. These smoothers are often sold as 4- and 8-diode variants, with the 8-diode ones (pictured above) offering a stronger smoothing effect. They plug into any 3D printer between the stepper drivers and the stepper motors, working their electrical “magic” without any other setup needed. Their low cost, plug-and-play functionality, and seemingly magical effect have made them quite beloved, albeit slightly controversial. The board provides flyback diodes (freewheeling diodes) for the motor outputs so that they are also protected against induction voltages in the unpowered state of the driver. You will get smoother movement. Features: Suitable for all FDM types of 3D printers Lower vibration, lower noise, and smoother result. Smoother movement especially on the delta-style 3Dprinter under DVR8825 stepper drivers and A4988/2 drivers.

SmartElex DRV8825 Stepper Motor Driver Module with Aluminum Heat Sink The SmartElex DRV8825 Stepper Motor Driver Module with Aluminum Heat Sink is a compact and efficient solution for controlling bipolar stepper motors with high precision. Built around the trusted TI DRV8825 IC, it supports microstepping up to 1/32 step, enabling smoother motion and finer positional accuracy in applications like 3D printing, CNC machining, and robotics. The module can deliver up to approximately 2.2A peak current with proper cooling, while the integrated aluminum heat sink ensures effective thermal management during continuous operation. Its adjustable current limiting feature protects the motor and driver, improving overall system reliability. With a simple STEP and DIR interface, the module easily integrates with popular platforms such as Arduino, ESP32, and Raspberry Pi, making it an excellent choice for both DIY enthusiasts and professional motion control systems. Features: Based on the TI DRV8825 microstepping bipolar stepper motor driver. Onboard adjustable current limiting potentiometer Supports microstepping up to a 1/32 step. Simple STEP/DIR control interface. Thermal shutdown, overcurrent, and undervoltage protection. Works with 3.3 V and 5 V logic systems. Compact breakout board with an aluminum heat sink for improved cooling.

SmartElex 12V 3A 8 Channel Signal Relay Module The SmartElex 12V 3A 8 Channel Signal Relay Module is a reliable control solution designed to switch multiple electrical devices using low-power control signals. It allows users to safely manage higher-voltage or higher-current loads without directly connecting them to sensitive control circuits. This module is suitable for students, makers, engineers, educators, and startups working on embedded systems, automation projects, and control applications that require dependable multi-channel switching. This 8-channel relay module is ideal for robotics, IoT systems, home and industrial automation, and advanced prototyping where several devices need to be controlled independently. It can be easily interfaced with popular platforms such as Arduino, Raspberry Pi, and ESP32 to control lights, motors, pumps, relays, or other external equipment. The straightforward design and consistent performance make it easy to integrate into both experimental setups and finished products, supporting safe and efficient control across a wide range of applications. Features: 8-channel relay module for controlling multiple devices independently Operates on 12V, suitable for automation and control systems Supports up to 3A load current per relay channel Electrical isolation between control signals and load circuits Compatible with Arduino, Raspberry Pi, ESP32, and other controllers Compact board design with LED indicators for channel status

SmartElex PCA9306 Logic Level Translator Breakout Module The SmartElex PCA9306 Logic Level Translator Breakout Module is a compact solution designed to shift signal voltages between different logic levels in electronic systems. This PCA9306 level translator helps connect components that operate at mismatched voltages, such as 1.8V, 3.3V, and 5V devices, without risking damage or unstable communication. It is ideal for students, hobbyists, engineers, educators, and startups who need a simple and reliable way to manage voltage differences in mixed-signal circuits, sensor interfaces, and microcontroller projects. With its bidirectional design, this voltage level translator supports seamless communication in both directions, making it suitable for robotics, IoT devices, automation systems, and embedded prototyping. It works smoothly with platforms like Arduino, Raspberry Pi, ESP32, and other controllers, allowing easy integration with modules, displays, and sensors. Whether used as a bidirectional level shifter for I2C communication or for general logic conversion, it offers a practical way to ensure safe and consistent signal translation across a range of development environments. Features: Based on the PCA9306 bidirectional level shifting IC Safely converts logic levels between 1.8V, 3.3V, and 5V devices Supports I2C and general-purpose bidirectional communication Protects components from voltage mismatches and signal damage Compatible with Arduino, Raspberry Pi, ESP32, and other controllers Compact breakout design for fast prototyping and integration

SmartElex DS3231 RTC Module with EEPROM (I2C, AT24C32) The SmartElex DS3231 RTC Module with EEPROM is a high-precision RTC module designed for accurate date and time tracking in embedded systems and IoT projects. Based on the DS3231 chip with an integrated temperature-compensated crystal oscillator (TCXO), this I2C RTC module ensures stable and reliable timekeeping across temperature variations. It features an onboard 32Kbit AT24C32 EEPROM for non-volatile data storage, along with 1Hz SQW and 32KHz outputs for timing applications. Operating within an exact voltage range of 2.2V to 5.5V, the module maintains time even during power loss using a backup battery, making it ideal for data loggers, automation systems, and time-critical electronics projects. Features: Temperature-compensated crystal oscillator (TCXO) for accurate timing. Additional data storage is provided by a built-in 32Kbit EEPROM. 1Hz SQW and 32KHz output pins. Battery backup ensures uninterrupted functioning. Supports both 12- and 24-hour time types. It operates with a voltage supply range of 2.2V to 5.5V.

7Semi MCP4725 12bit Digital to Analog I2C Breakout Module The 7Semi MCP4725 12bit Digital-to-Analog I2C Breakout Module is a compact and reliable MCP4725 DAC module designed for accurate analog voltage generation in embedded and IoT projects. This single-channel digital-to-analog converter delivers true 12-bit resolution with a buffered rail-to-rail output, ensuring stable and precise voltage control. Operating on a 2.7V to 5.5V supply, it communicates via the I2C interface supporting standard, fast, and high-speed modes up to 3.4 Mbps. With an onboard non-volatile EEPROM, the module retains its last configured output even after power-off, making it ideal for automation systems, signal generation, and microcontroller-based applications where consistent analog output is critical. Features: 12-bit resolution provides high-precision output for precise analog signal representation. On-Board Nonvolatile Memory (EEPROM): Configuration settings are retained even when the power is turned off, ensuring speedy power-up and project continuity. Low power consumption: Ideal for battery-powered applications, which extends device life. I2C Interface: Supports three modes: Standard (100 kbps), Fast (400 kbps), and High-Speed (3.4 Mbps), with eight addresses available for flexible communication. Rail-to-Rail Output: Expands the output voltage range, increasing versatility in a variety of applications. Fast Settling Time: With an average settling time of only 6 µs, you can analyze signals quickly and accurately.

SmartElex 12V 10A Single Channel Automotive Relay Module The SmartElex 12V Relay Module is a compact and reliable 12V relay module designed to safely control high-power electrical loads using low-voltage signals from microcontrollers. It helps users switch devices like motors, lights, pumps, and automotive accessories without directly handling high current, making projects safer and easier to manage. This Single Channel Relay Module is well suited for students, makers, educators, engineers, and startups working on electronics, robotics, or automation projects where dependable load control is required. Built for real-world applications, this relay module integrates smoothly with popular development platforms such as Arduino, Raspberry Pi, and ESP32, making it ideal for robotics control systems, IoT automation, smart vehicles, and DIY prototyping. Its automotive-grade design ensures stable performance in demanding environments, while the simple input interface allows quick integration into new or existing projects. Whether you are building a prototype, an automation solution, or an educational demo, this module offers dependable switching and easy integration for everyday electronics applications. Note: Refer to datasheet in the ATTACHMENTS section for more info. regd. the product. Features: Supports safe switching of 12V DC loads in high-power applications Uses an automotive-grade relay for reliable and long-lasting operation Compact and durable design suitable for space-constrained setups Easy to interface with Arduino, Raspberry Pi, ESP32, and other controllers Low-power trigger allows efficient control using logic signals or switches Suitable for automotive systems, robotics, DIY electronics, and automation projects

Dual Micro USB 18650 LiPo DIY Power Bank Module (3.7V to 5V, 2A Output) The Dual Micro USB 18650 LiPo DIY Power Bank Module is designed to convert a 3.7V 18650 lithium battery into a stable 5V output with up to 2A current, making it perfect for charging smartphones, IoT devices, and other USB-powered gadgets. At its core, this module functions as a compact power management and boost conversion board, allowing you to build a fully customized portable power bank. It features dual Micro USB ports for convenient charging and integrated LED indicators to display charging and power status. Ideal for DIY enthusiasts, makers, and electronics hobbyists, this board gives you the flexibility to create your own reliable mobile power solution—provided you have basic electronic assembly knowledge. When installing items, it is important to keep the following in mind: Batteries can be connected in parallel with a voltage ranging from 3.2 to 4.2V, including 18650 flat and polymer batteries. We can connect the battery to the motherboard B + negative-, which is installed against the burning motherboard. Batteries that are new and old, or that have contradictory model brands, cannot be mixed. Features: Four-level LED bulb displays power, not working situation intelligent automated shutdown. The built-in lithium battery protection IC, overcurrent, overpressure, and undervoltage protection Dual USB output ports. Input requirements: 5V constant voltage power supply can charge input power, the most matching charger for 5V 1A or above. Requirements for rechargeable batteries: Compatible batteries include 18650 batteries, cell phone batteries, flat-panel batteries, MP3 batteries, and polymer lithium batteries ranging from 3.7V to 4.2V.

5V WiFi Smart Relay Module for IoT & DIY Projects The 5V WiFi Relay Module is a smart control board that lets you switch electrical devices on and off using a WiFi connection. It works with standard 5V power and can be connected to home networks, allowing remote control of lights, fans, appliances, and other devices through your smartphone or automation system. This module is designed for easy integration with DIY electronics and smart home projects. It provides reliable switching performance and can be used in both residential and hobby automation setups. Whether you’re building a custom smart switch or adding wireless control to your gadgets, the 5V WiFi Relay Module offers a simple and flexible way to make your devices connected and controllable over WiFi. Features: Operates on 5V power supply for easy integration Enables wireless ON/OFF control of electrical devices over WiFi Suitable for smart home and IoT automation projects Supports remote switching via mobile app or automation system Reliable relay-based output for controlling loads safely Compact module design for DIY electronics and embedded systems Ideal for controlling lights, fans, pumps, and appliances

SmartElex USB-C Serial Basic Converter and CH340C IC Breakout Module he SmartElex USB-C Serial Basic Converter with CH340C is a compact USB-to-serial adapter designed to help users program, debug, and communicate with microcontroller boards and embedded systems. It converts USB signals to reliable UART serial communication, making it useful for students, hobbyists, engineers, educators, and startups working with boards that lack native USB support. With its USB-C interface and CH340C chipset, it provides a simple plug-and-play experience for connecting development boards, sensors, and custom circuits to a computer. This USB-to-serial converter is ideal for prototyping in robotics, IoT development, firmware flashing, serial monitoring, and automation projects. It works smoothly with platforms like Arduino, ESP8266, ESP32, Raspberry Pi (UART pins), and other TTL-based microcontrollers, making integration straightforward in both development and testing stages. Offering stable communication and easy computer connectivity, the SmartElex USB-C Serial Basic Converter with CH340C is a practical tool for labs, DIY electronics, and professional development environments. Features: Converts USB-C to TTL serial for programming and debugging CH340C chipset ensures stable and reliable UART communication Plug-and-play design for quick connection to development boards Compatible with Arduino, ESP8266, ESP32, Raspberry Pi (UART), and more Ideal for firmware flashing, serial monitoring, and IoT prototyping Compact breakout module for labs, workshops, and field testing

SmartElex 12V 10A Single Channel Power Relay Module The SmartElex 12V 10A Single Channel Power Relay Module is a reliable switching solution designed to control high-power electrical loads using low-voltage control signals. It helps safely operate devices that draw higher current without directly connecting them to sensitive control circuits. This module is suitable for students, makers, engineers, educators, and startups who are working on electronics projects, automation systems, or prototypes that require dependable and safe power switching. This single channel power relay module is widely used in robotics, IoT applications, home automation, and industrial control projects where motors, lights, pumps, or appliances need to be switched on and off reliably. It can be easily interfaced with popular platforms such as Arduino, Raspberry Pi, and ESP32, making integration simple for both learning projects and real-world systems. The sturdy design and consistent performance make it a practical choice for prototyping as well as final deployment in power control applications. Features: Single channel power relay module for high-current load switching Operates on 12V, suitable for automation and control applications Supports up to 10A load current for power devices Electrical isolation between control and load circuits for safety Compatible with Arduino, Raspberry Pi, ESP32, and similar boards Compact and durable design for easy integration

SmartElex 8 Channel Multiplexer Breakout Module – (74HC4051) The SmartElex 8 Channel Multiplexer Breakout Module (74HC4051) is a compact and efficient solution for expanding input and output options in electronic projects. This 74HC4051 multiplexer breakout allows users to route multiple signals through a single microcontroller pin, solving the problem of limited I/O availability when working with sensors, switches, or analog inputs. It is designed for students, makers, engineers, educators, and startups who need a practical way to manage multiple device connections without increasing hardware complexity. This module acts as both an 8 channel multiplexer and demultiplexer, making it suitable for robotics, IoT systems, automation tasks, and rapid prototyping. It integrates smoothly with Arduino, Raspberry Pi, ESP32, and similar platforms, enabling users to scale projects without sacrificing performance or stability. Whether you are building sensor hubs, data acquisition systems, or experimenting with signal routing, this multiplexer demultiplexer module offers a reliable and easy-to-use interface that enhances flexibility in circuit design. Features: Based on the 74HC4051 8-channel analog/digital multiplexer IC Expands I/O by routing up to 8 signals through a single control interface Works as both a multiplexer and demultiplexer for flexible signal routing Helps manage limited microcontroller pins in multi-sensor projects Compatible with Arduino, Raspberry Pi, ESP32, and similar platforms Ideal for robotics, IoT systems, data acquisition, and prototyping

7Semi MCP4728 Quad DAC Module The 7Semi MCP4728 Quad DAC Module is a compact and reliable DAC module designed to convert digital signals into precise analog voltage outputs. Based on the MCP4728 IC, this digital-to-analog converter breakout board allows users to generate up to four independent analog outputs using simple I²C communication, making it an efficient solution for applications where microcontrollers lack sufficient analog output pins or require higher accuracy. This module offers easy integration with popular microcontrollers, stable performance, and flexible voltage output control, making it ideal for signal generation, sensor simulation, audio control, and calibration tasks. With its user-friendly design and dependable operation, it is well suited for students learning embedded systems, hobbyists building DIY electronics, and professionals developing prototypes or compact analog control systems. Features: Powered by the Microchip MCP4728 Quad DAC IC 12-bit resolution on all four DAC output channels (A–D) Onboard non-volatile EEPROM retains DAC settings after power-off I²C interface with Fast Mode support up to 400 kHz Low-power operation, ideal for battery-powered projects Compact 7Semi breakout with clearly labeled pinouts Supports LDAC and RDY pins for real-time DAC updates and monitoring Applications: Signal generation (sine, square, and triangle waveforms) Audio voltage control for synthesizers and mixers Programmable and adjustable reference voltage sources Lab instruments, testing, and control systems Industrial automation and process control applications Multi-channel analog and neural interface testing

SmartElex NS612 PIR Motion Sensor Module The SmartElex NS612 PIR Motion Sensor Module is a passive infrared motion detection solution designed to sense human movement by detecting changes in infrared radiation. It helps automate systems by triggering actions only when motion is detected, reducing unnecessary power usage and improving system efficiency. This module is suitable for students, makers, engineers, educators, and startups working on electronics projects that require reliable and responsive motion sensing for security, automation, or interactive applications. This PIR motion sensor module is widely used in robotics, IoT devices, security systems, and home or industrial automation projects where motion detection is essential. It can be easily interfaced with popular development platforms such as Arduino, Raspberry Pi, and ESP32, allowing quick integration into prototypes and working systems. The dependable performance and simple interface make it ideal for applications like motion-activated lighting, alarm systems, smart monitoring solutions, and embedded electronics projects. Features: Passive infrared (PIR) sensor for accurate human motion detection Detects movement by sensing changes in infrared radiation Long sensing range suitable for wider coverage areas Low power consumption for battery-powered applications Digital output for easy interfacing with microcontrollers Compatible with Arduino, Raspberry Pi, ESP32, and similar boards

SmartElex 10A 5V 1-Channel Relay Module The SmartElex 10A 5V 1-Channel Relay Module is a compact and dependable low level trigger relay module designed to control high-power devices using low-voltage microcontrollers. Operating at 5V DC, this single channel relay module features an SPDT relay rated for 10A at 250VAC, making it suitable for switching lights, motors, pumps, and other appliances. Its isolated input circuitry helps protect sensitive control boards from voltage spikes, while the onboard pull-down circuit prevents false triggering during startup. With a clear power indicator and secure mounting design, this 5V Relay Module delivers safe, stable, and long-lasting performance for home automation, industrial control, and DIY electronics projects. Features: A single-channel relay module with SPDT setup Supports up to 10A at 250 VAC for high-current applications. High-level trigger for dependable control. Compatible with a wide range of microcontrollers, including Arduino, AVR, PIC, and ARM. Isolated inputs to protect sensitive control circuitry. Contains a pull-down circuit to avoid inadvertent activation. Power supply indicator for rapid status checks. complies with international safety standards Convenient installation with four mounting holes.