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Amazon.com: KeeYees 10pcs 4 Channels IIC I2C Logic Level Converter Bi-Directional Module 3.3V to 5V Shifter for Arduino (Pack of 10) : Electronics
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Logic Level Converter module 3.3V 5V TTL - Mikroelectron MikroElectron is an online electronics store in Amman
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3.3 V to 5 V logic level converter using two transistor and 4 resistors. | Diy electronics, Shifter, Resistors
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5V to 3.3V logic level translation/conversion/shifting: how to interface a 5V output to a 3.3V input. – next-hack.com
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