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Forum Index : Microcontroller and PC projects : I2C Intro & Pull-up calculation

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paceman
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Joined: 07/10/2011
Location: Australia
Posts: 1329
Posted: 02:26am 09 Feb 2017
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Hackaday are doing a series of articles on using I2C devices here.
They've also referenced a TI Application Note that shows how to properly calculate the pullup needed. Useful stuff.

Greg
 
Phil23
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Joined: 27/03/2016
Location: Australia
Posts: 1667
Posted: 10:58am 09 Feb 2017
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Very interesting.

Can anyone throw up some "bucket figures" on what's "Long" cable runs & when issue are expected?

Here I typically have a mix of phone, security & shielded data cable.

Lengths can range from under 2m, up to around 10m.

Some very loose recommendations on lengths & cable types would be valuable for the less electronically inclined.

(Personally I wouldn't have a clue about the capacitance of my cables & their expected reliability).

Thanks

Phil
 
paceman
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Joined: 07/10/2011
Location: Australia
Posts: 1329
Posted: 08:49pm 09 Feb 2017
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The Hackaday article has some info on what's a long or short cable. It's down in the comments area under the article.

Greg
 
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