internal resistance of digital pins

lukint New Member Posts: 20	internal resistance of digital pins May 2, 2018 8:47:48 GMT Quote Select Post Deselect Post Link to Post Back to Top Post by lukint on May 2, 2018 8:47:48 GMT Hi, does anybody know the internal resistance of the digital pins? I want to ensure that my input voltage of a sensor does not exceed 3.3V. Many thanks!

Admin Administrator Posts: 711	internal resistance of digital pins May 3, 2018 9:48:18 GMT Quote Select Post Deselect Post Link to Post Back to Top Post by Admin on May 3, 2018 9:48:18 GMT The maximum pin sinking current is 10mA but it is advisable to keep well below this. The effective on resistance depends on which pin it is! Most pins are around 150 Ohms using the ShieldBuddy add-in's configuration.

lukint New Member Posts: 20	internal resistance of digital pins May 3, 2018 10:56:33 GMT Quote Select Post Deselect Post Link to Post Back to Top Post by lukint on May 3, 2018 10:56:33 GMT Ok, thanks for the quick reply.