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[Solved / Archived] What is the max voltage on VIN of P2? (Witty Pi 4 Mini)

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(@jim-1140)
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The user manual says it can read up to 25V but can it electrically handle say 30V and just give a reading of 25V?  I'm looking at a 24V battery system which will likely exceed 25V at times.

 
Posted : 16/11/2023 4:23 pm
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(@admin)
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The user manual doesn't say it can read up to 25V, what it says is the low voltage threshold can be set to a value up to 25V.

There is a 57:1 voltage divider between the VIN pin and the ADC, and Witty Pi's firmware uses 1.1V as internal voltage standard. So the VIN pin can measure up to 62.7V.

 
Posted : 16/11/2023 4:40 pm
(@jim-1140)
Posts: 2
New Member Customer
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OK!  The 57:1 voltage divider pretty much answers the question.  Thanks.

 
Posted : 16/11/2023 5:09 pm
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