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Original file line number Diff line number Diff line change
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---
title: "I2C and pull-up resistors"
id: 4402394268562
id:
---

For effective data transmission with the Inter-Integrated Circuit (I2C) protocol using Arduino, it's often necessary to use external pull-up resistors on the designated I2C pins. Most Arduino boards don't have pre-installed pull-up resistors on these pins, but instead they offer exposed pads for surface mount resistors. This gives more flexibity on how these pins can be used. More specifically:
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