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I'm not good at hardware at all so apologies shall this question sound funny or weird. Is there a board or something that I could use to protect the I2C pins of my raspberry from being damaged? Just in case I connect something the wrong way - can I hinder the RPI from being killed by it? I'm going to only use the I2C pins.

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Mike Cook's Breakout Board has zener diode protection for every port. It's quite a fiddly build, though.

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