2 Channel Logic Level Converter (I2C, UART, 5V-3.3V) The 2 Channel Logic Level Converter is a small device that safely steps down 5V signals to 3.3V and steps up 3.3V to 5V. This level converter also works with 2.8V and 1.8V devices. Each level converter has the capability of converting 4 pins on the high side to 4 pins on the low side. Two inputs and two outputs are provided for each side. This logic level converter is compatible with Arduino , Raspberry Pi and STM 32. Each level converter has the capability of converting 4 pins on the high side to 4 pins on the low side with two inputs and two outputs provided for each side. The level converter is very easy to use. The board needs to be powered from the two voltages sources (high voltage and low voltage) that your system is using. High voltage (5V for example) to the HV' pin, low voltage (3.3V for example) to LV', and ground from the system to the GND' pin. Application: TTL Logic Level Converter Bidirectional Logic Level Conversion

4 Channel (I2C or SPI) 3.3V-5V Bi-Directional Logic Level Converter If you've ever tried to connect a 3.3V device to a 5v system, you know what a challenge it can be. The bi-directional logic level converter is a small device that safely steps down 5v signals to 3.3V and steps up 3.3V to 5v at the same time. This level converter also works with 2.8V and 1.8V devices. What separates this logic level converter from our previous versions is that you can successfully set your high and low voltages and step up and down between them safely on the same channel. Each level converter has the capability of converting 4 pins on the high side to 4 pins on the low side with two inputs and two outputs provided for each side. The level converter is very easy to use. The board needs to be powered from the two voltage sources (high voltage and low voltage) that your system is using. High voltage (5v for example) to the 'hv' pin, low voltage (3.3V for example) to 'lv', and ground from the system to the 'gnd' pin logic level shifter bi-directional with 4 channels between high logic and low logic small module with 1.3Cm x 1.5Cm with 2 rows of 6 pin compatible with a breadboard, can be directly used in breadboard usage: for example, high voltage is 5v, low voltage is 3.3V hv connect with 5v power supply lv connect with 3.3V power supply and connect the power negative pole lvx input/output 3.3V TTL hvx input/output 5v ttl bi-directional transform between lvx and tvx Features: Mutual transform between 5V TTL and 3.3V TTL Four channels of logic and high voltage low voltage logic can two-way transform Portable and light, with 2 rows 6 pin contact pins Level Converter- 4 Channel Compatible with the bread plate, can be used directly put on the breadboard 4 Channel Module (great for I2C or SPI) and will work with all microcontrollers, Arduino, Raspberry Pi, Intel Edison, NXP Mbed Also check 2 Channel Logic Level Converter (I2C, UART, 5V-3.3V) available on the Iotcart website. It is a small device designed to safely step down 5V signals to 3.3V and simultaneously step up 3.3V to 5V. The converter is bi-directional and works with 2.8V and 1.8V devices as well. It has two inputs and two outputs for each side, allowing the conversion of 4 pins on the high side to 4 pins on the low side.

SmartElex 4P-LLC Bi-Directional Logic Level Converter The SmartElex Bi-Directional Logic Level Converter makes it easy to connect devices that operate at different voltage levels. It allows safe and reliable communication between 3.3V and 5V systems, perfect for interfacing sensors, microcontrollers, and modules like Arduino, Raspberry Pi, and ESP32. The module safely steps down 5V signals to 3.3V while stepping up 3.3V signals to 5V, ensuring seamless operation without damaging sensitive components. Compact yet powerful, this logic level converter supports additional voltage ranges like 1.8V and 2.8V, making it highly versatile. Each channel can handle both high- and low-voltage signals simultaneously, enabling smooth integration in multi-voltage projects. Whether you’re building DIY electronics, automation systems, or IoT applications, this module offers a simple and safe solution to handle mixed-voltage communication effortlessly. Features: Bi-directional voltage conversion between 1.8V, 2.8V, 3.3V, and 5V systems. Supports four channels with two inputs and two outputs on each side. Easy wiring with clearly labeled HV, LV, and GND pins. Compact design ideal for space-limited electronic projects. Ensures safe signal shifting without damaging low-voltage components. Reliable performance with consistent and accurate voltage translation. Compatible with popular boards like Arduino, Raspberry Pi, and ESP8266.

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 8-Bit Bidirectional Voltage-Level Translator Breakout – TXB0108 Logic Converter Module The 8-Bit Bidirectional Voltage-Level Translator Breakout is a small yet powerful board designed to help your electronics talk to each other—even when they use different voltages. With this voltage level translator, your 3.3 V and 5 V devices can connect safely and reliably without damaging anything. This bidirectional voltage level translator module uses the TXB0108 chip to automatically detect and convert signal directions. That means whether you're sending or receiving data, it adapts without you needing to flip switches or reset modes. It’s perfect for microcontrollers, sensors, displays, and more. Whether you’re working on a project with an Arduino, ESP32, or Raspberry Pi, this breakout board makes it easy to connect mixed-voltage components. Save time, avoid wiring frustrations, and focus on building your project instead of worrying about voltage mismatches. Features: 8-Bit Bidirectional Conversion: Supports up to 8 independent data lines for smooth voltage translation. Automatic Direction Detection: The TXB0108 chip automatically senses signal direction - no manual switching needed. Wide Voltage Compatibility: Works with 1.2V to 3.6V on one side and 1.65V to 5.5V on the other, ideal for mixed-voltage systems. High-Speed Communication: Supports fast data transfer rates for I2C, SPI, UART, and GPIO connections. Compact and Easy to Use: Small, plug-and-play voltage level translator breakout board that fits into any circuit design. Safe and Reliable: Protects devices from damage caused by mismatched voltage levels, ensuring stable performance.

SmartElex TXB0104 Logic Level Converter – Single Supply The SmartElex TXB0104 Logic Level Converter – Single Supply is a compact module designed to safely shift voltage levels between different digital systems. This logic level converter allows smooth communication between devices operating at 1.8V, 3.3V, and 5V without risking signal damage or instability. It is ideal for students, hobbyists, engineers, educators, and startups who need a hassle-free way to connect sensors, modules, and microcontrollers with mismatched voltage standards in projects ranging from simple prototypes to more advanced electronics systems. With support for bidirectional data flow, this module functions as a reliable 3.3V to 5V level shifter and general-purpose 4-bit bidirectional voltage level translator, making it a great fit for robotics, IoT networks, home automation, and embedded development. It integrates smoothly with platforms like Arduino, Raspberry Pi, ESP32, and other microcontroller boards, offering an easy way to ensure signal compatibility during development or deployment. Whether you’re experimenting in a lab or building final hardware, this board helps maintain safe and consistent communication across your circuit. Features: Shifts logic signals safely between 1.8V, 3.3V, and 5V systems TXB0104 IC enables 4-bit bidirectional level translation Supports both input and output direction automatically Ideal for I2C, SPI, UART, GPIO, and general digital interfaces Works with Arduino, Raspberry Pi, ESP32, and similar controllers Compact module for easy use in prototyping and embedded projects

SmartElex FT232 Type C, USB To UART (TTL) Communication Module The SmartElex FT232 Type C USB to UART (TTL) Communication Module is a high-performance communication module designed to bridge USB systems with TTL-based serial devices smoothly and reliably. Built around the genuine FT232RL USB serial interface board, it ensures stable data transfer and wide driver support across multiple operating systems. The USB-C interface offers durability and modern connectivity, while the onboard jumper allows precise selection between 3.3V and 5V TTL output, making it suitable for Arduino, ESP, Raspberry Pi, and other embedded platforms. With clear LED indicators for transmission, reception, and power, this USB to UART TTL converter module simplifies debugging, firmware flashing, and serial communication tasks in both development and production environments. Applications: Programming and Debugging Microcontrollers Serial connection between embedded systems USB to TTL converter for different devices Data logging and monitoring. Integration of IoT devices Cautions: To avoid damage, ensure that the voltage is set correctly using the onboard jumper. This module is intended for TTL level signals; do not connect directly to RS232 ports. Avoid dampness and static discharge. Features: Original FTDI FT232RL chipset for dependable and steady UART connectivity USB Type-C connector improves compatibility and supports contemporary devices. Supports 3.3V and 5V TTL logic levels via jumper selection. Fast data transfer rates of up to 3 Mbps Real-time LED status indicators for TXD, RXD, and power monitoring Compact design is perfect for embedded system integration. Compatible with various operating systems, including Windows, macOS, Linux, Android, and Windows CE. USB-powered with a maximum output current of 500 mA. Plug-and-play capabilities for quick setup and deployment. Suitable for prototyping, debugging, and data logging applications.

SmartElex FT232RL USB to TTL Converter – High-Speed USB to UART Module The SmartElex FT232RL Industrial USB to TTL Converter is a durable and high-performance communication module designed to bridge USB and TTL interfaces seamlessly. Powered by the reliable FTDI FT232RL chipset, it ensures stable and efficient data transmission, making it perfect for industrial use, embedded systems, and automation setups. Its robust design, built-in ESD protection, and resettable fuse make it a trusted tool for long-term and demanding environments. This USB to UART converter supports both 3.3V and 5V logic levels, giving you flexibility for various applications such as microcontroller programming, data logging, and debugging. With plug-and-play support across Windows, macOS, Linux, and Android, it’s user-friendly and versatile. The onboard LEDs for TXD, RXD, and power make monitoring communication easy, while the fool-proof 8-pin header ensures secure and reliable connections every time. Applications: Programming and debugging microcontrollers Serial communication with embedded systems USB to TTL conversion for various devices Data logging and monitoring Integration with industrial automation systems. Cautions: Ensure correct voltage selection using the onboard jumper to prevent damage. This module is designed for TTL level signals; do not connect directly to RS232 interfaces. Avoid exposure to moisture and static discharge. Features: Built with the original FTDI FT232RL chipset for reliable USB to UART communication. Supports 3.3V and 5V logic levels, selectable via jumper. Wide baud rate range from 300 bps to 3 Mbps. Features TXD, RXD, and Power LEDs for clear status indication. Equipped with ESD protection diodes and a resettable fuse for safety. Compatible with Windows, macOS, Linux, and Android systems. Compact and lightweight design, ideal for embedded and industrial setups.

SmartElex MAX31856 Temperature PCB Breakout Board with SPI Interface The SmartElex MAX31856 PCB Master Breakout Board is a high-precision thermocouple amplifier and converter designed to work with a wide range of thermocouple types including K, J, N, R, S, T, E, and B. Powered by the reliable MAX31856 chip, it converts tiny thermocouple signals into accurate digital readings using a 4-wire SPI interface, making it easy to connect with microcontrollers like Arduino, Raspberry Pi, and ESP32. This MAX31856 breakout board includes a built-in 3.3V voltage regulator, level-shifting circuitry, and inline filtering components for stable performance. It ensures accurate cold-junction compensation, fault detection, and wide temperature measurement capability ranging from -210°C to +1800°C. Perfect for applications involving temperature monitoring and industrial automation, this thermocouple amplifier module delivers precise readings with minimal setup effort. Features: Compatible with multiple thermocouple types: K, J, N, R, S, T, E, and B. Wide temperature measurement range: -210°C to +1800°C with fine resolution. Communicates via 4-wire SPI for simple microcontroller interfacing. Includes onboard 3.3V regulator and logic level shifting for 3.3V/5V systems. Features cold-junction compensation for accurate temperature readings. Built-in fault detection for open, short, or out-of-range thermocouples. Comes preassembled with terminal block and pin header for easy integration.