The BOB-13906 is a Logic Level Converter Bi-Directional board from SparkFun Electronics. This small PCB allows you to safely step up or step down voltages between different logic levels, making it ideal for interfacing 5V microcontrollers with 3.3V sensors, or vice versa. The bi-directional design handles both input and output signals, simplifying communication between devices with differing voltage requirements.

Applications:

• Interfacing 5V Arduino with 3.3V sensors and peripherals.
• Connecting 3.3V Raspberry Pi to 5V devices.
• Mixing different logic levels in custom electronic projects.
• Level shifting I2C, SPI, and other digital signals.
• Protecting sensitive components from overvoltage.

Features:

• Bi-Directional Level Conversion: Supports both step-up and step-down voltage conversion.
• Four Channels: Provides four independent channels for level shifting.
• Compact Size: Small form factor for easy integration into projects.
• Easy to Use: Simple connections for high and low voltage sides.
• Compatible with Multiple Logic Levels: Works with a wide range of voltage levels.

Benefits:

• Safe Interfacing: Prevents damage to components due to voltage mismatch.
• Simplified Connections: Bi-directional design reduces wiring complexity.
• Versatile Use: Suitable for a variety of level shifting applications.
• Easy Integration: Compact size allows for easy incorporation into projects.
• Improved Reliability: Ensures stable and reliable communication between devices.

Additional Details:

The BOB-13906 requires two voltage sources: a high voltage (HV) and a low voltage (LV). Each channel has two pins: one connected to the HV side and one connected to the LV side. When a signal is sent from the LV side to the HV side, the board steps up the voltage. Conversely, when a signal is sent from the HV side to the LV side, the board steps down the voltage. This is achieved using a simple resistor divider and a MOSFET, which automatically adjusts the voltage level based on the signal direction. The board is commonly used in projects where different devices with varying voltage requirements need to communicate seamlessly, such as connecting 5V Arduino boards to 3.3V sensors or peripherals.