The BOB-12009 is a Bi-Directional Logic Level Converter manufactured by SparkFun Electronics12. It’s a small device that safely steps down 5V signals to 3.3V AND steps up 3.3V to 5V at the same time
Here are some key details about the BOB-12009:
It’s used to interface different voltage levels, for example, allowing a 5V device to communicate with a 3.3V device
The BOB-12009 uses the BSS138 transistor
It has 4 channels
It’s commonly used in development boards, kits, and programmers
Customer reviews suggest that the BOB-12009 is easy to use, effective, and robust1. It has been used in various applications, such as interfacing with the Nokia Display, driving ST Micro SWIM Lines down an 8-foot cable, and working with WS2811 LEDs