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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 3y ago by Circuit fantasist‭

Question pull-up-resistor

#1: Initial revision by

Olin Lathrop‭ · 2020-06-15T20:01:05Z (almost 4 years ago)

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<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?

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