KeeYees 4-Channel IIC I2C Logic Level Converter Module User Manual

1. Introduzione

The KeeYees 4-Channel Bi-Directional Logic Level Converter Module is designed to safely interface devices operating at different voltage levels. This module allows for seamless communication between 3.3V and 5V systems, converting signals in both directions. It is particularly useful for microcontrollers like Arduino (5V) and ESP32/Raspberry Pi (3.3V) when communicating via protocols such as IIC (I2C).

Each module provides four independent channels for logic level conversion. The package includes the converter modules and pin headers for easy integration into your projects.

2. Contenuto della confezione

• 10 x KeeYees 3.3V-5V 4 Channels Logic Level Converter Bi-directional Shifter Module
• 20 x 6-Pin Single Row Pin Headers

3. Configurazione e connessione

The logic level converter requires power from both the high voltage (HV) and low voltage (LV) systems it is connecting. Ensure proper grounding for stable operation.

3.1 Diagramma di pinout

Figura 1: in alto view of the KeeYees 4-Channel Logic Level Converter module showing pin labels for High Voltage (HV), Low Voltage (LV), and Ground (GND) connections.

3.2 Fasi di connessione

1. Collega l'alto volumetage (HV) Power: Connect the 5V power supply from your high-voltage system (e.g., Arduino) to the HV pin on the converter module.
2. Connetti Basso Voltage (LV) Power: Connect the 3.3V power supply from your low-voltage system (e.g., ESP32, Raspberry Pi) to the LV pin on the converter module.
3. Collegare terra: Connect the common ground from both your high-voltage e basso volumetage systems to the Terra pin on the converter module. There are two GND pins, either can be used.
4. Connect Logic Signals:
   • For signals from the high-voltage system (e.g., 5V output from Arduino) that need to be converted to low voltage (3.3V input for ESP32), connect the 5V signal to an HVx pin (e.g., HV1). The corresponding LVx pin (e.g., LV1) will output the 3.3V converted signal.
   • For signals from the low-voltage system (e.g., 3.3V output from ESP32) that need to be converted to high voltage (5V input for Arduino), connect the 3.3V signal to an LVx pin (e.g., LV2). The corresponding HVx pin (e.g., HV2) will output the 5V converted signal.

Figure 2: Illustrative diagram showing typical connections for the logic level converter, demonstrating how 5V and 3.3V TTL signals are interfaced between HV and LV sides.

4. Principi operativi

The KeeYees logic level converter utilizes a bi-directional design, meaning it can translate signals from high voltage a basso voltage and vice-versa simultaneously on the same channel. This is achieved using MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) and pull-up resistors.

• Quando un volume bassotage signal (e.g., 3.3V) is applied to the LV side, the module steps it up to the high-voltage level (e.g., 5V) on the HV side.
• Conversely, when a high-voltage signal (e.g., 5V) is applied to the HV side, it is safely stepped down to the low-voltage level (e.g., 3.3V) on the LV side.
• The module supports common digital communication protocols such as IIC (I2C), SPI, and UART, making it versatile for various embedded projects.

5. Manutenzione

The KeeYees logic level converter module is a robust electronic component designed for long-term use with minimal maintenance. To ensure optimal performance and longevity:

• Mantenere pulito: Avoid dust, dirt, and moisture accumulation on the module. If cleaning is necessary, use a soft, dry brush or a lint-free cloth. Do not use liquid cleaners.
• Maneggiare con cura: Avoid applying excessive force to the pins or the board itself. Electrostatic discharge (ESD) can damage electronic components; handle the module in an ESD-safe environment if possible.
• Conservazione corretta: Conservare il modulo in un ambiente asciutto e fresco, lontano dalla luce solare diretta e da temperature estreme.
• Ispezionare le connessioni: Periodically check all soldered connections and pin headers for looseness or corrosion, especially in projects that experience vibration or frequent handling.

6. Risoluzione Dei Problemi

If you encounter issues while using the logic level converter, consider the following troubleshooting steps:

• No Signal Conversion:
  • Verify that both the HV and LV power supplies are correctly connected and providing the specified voltages (e.g., 5V to HV, 3.3V to LV).
  • Ensure that the common ground (GND) is properly connected between the converter and both systems.
  • Check all signal connections (HVx to LVx) for continuity and correct pin assignment.
• Slow Signal Response / Data Errors:
  • For high-speed applications (e.g., fast I2C or SPI), ensure that appropriate pull-up resistors are used on the HV side if not already present in your circuit. The internal pull-ups on the converter might be sufficient for standard speeds but not for very high frequencies.
  • Keep wire lengths as short as possible to minimize signal degradation and noise.
  • The module's design (using MOSFETs) can introduce a slight delay or slower rise times compared to active buffer solutions. For extremely critical timing applications, consider alternative level shifting methods.
• Il modulo non si accende:
  • Double-check power connections to HV, LV, and GND pins.
  • Ensure your power supplies are functional and delivering the correct voltage corrente sufficiente.
• Danni fisici: Inspect the module for any visible signs of damage, such as bent pins, burnt components, or cracked solder joints.

7. Specifiche

Figure 3: Dimensional drawing of the KeeYees 4-Channel Logic Level Converter module, indicating key measurements such as 12.7mm width and 2.54mm pin pitch.

8. Garanzia e supporto

Specific warranty information for the KeeYees 4-Channel IIC I2C Logic Level Converter Module is not provided in the available product data. For details regarding warranty coverage, returns, or technical support, please refer to the official KeeYees websito o contatta direttamente il venditore tramite la tua piattaforma di acquisto.

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