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Q&A How to calculate pullup resistor value for pushbutton?

What value pullup resistor should I use for a pushbutton connected to a microcontroller input? I've seen values from 1 kΩ to over 100 kΩ. Some references just say to use 10 kΩ because it's a "goo...

2 answers  ·  posted 4y ago by Olin Lathrop‭  ·  last activity 4y ago by Circuit fantasist‭

Question pull-up-resistor
#1: Initial revision by user avatar Olin Lathrop‭ · 2020-06-15T20:01:05Z (over 4 years ago)
<p>What value pullup resistor should I use for a pushbutton connected to a
microcontroller input?

![Image alt text](https://electrical.codidact.com/uploads/VETExY638GNHNBKNKHrLGnEm)

<p>I've seen values from 1 k&Omega; to over 100 k&Omega;.  Some references
just say to use 10 k&Omega; because it's a "good value".  How do I
calculate this to decide for myself?