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4-channel I2C-safe Bi-directional Logic Level Converter [BSS138] : ID 757 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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uart - Logic Level Conversion: Different Voltages on High Side - Electrical Engineering Stack Exchange
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Amazon.com: DEVMO 5PCS IIC I2C Logic Level Converter Bi-Directional Module 4 Channels 5V to 3.3V Shifter Compatible with Ar-duino : Electronics
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I2C Bi-Directional Logic Level Converter-4 Channel | Sharvielectronics: Best Online Electronic Products Bangalore
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