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lamaPLC: Bi-Directional Logic Level Converter 3.3V ↔ 5V
The Two-Channel 5V to 3.3V Bi-Directional Logic Level Converter is a compact module designed to safely bridge communication between devices operating at different voltage levels, such as an Arduino Uno (5V) and a Raspberry Pi or 3.3V sensor.
Key Features
- Bi-Directional Communication: Automatically converts signals from 5V to 3.3V and vice versa on the same channel.
- Voltage Flexibility: Although primarily used for 5V and 3.3V, many modules are compatible with 1.8V and 2.8V systems.
- Compact Design: Usually measures about 16mm x 13mm and is suitable for breadboard use.
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Typical Pinout and Wiring
The module is divided into a High Voltage (HV) side and a Low Voltage (LV) side. You must provide power references to both.
| Pin Label | Connection |
|---|---|
| HV | 5V Power Supply (High Voltage Reference) |
| LV | 3.3V Power Supply (Low Voltage Reference) |
| GND | Common Ground (connect to both systems) |
| HV1 / HV2 | 5V side data lines (e.g., SDA/SCL from Arduino) |
| LV1 / LV2 | 3.3V side data lines (e.g., SDA/SCL to sensor) |
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