# Odd analog readings \[SOLVED\]

**URL:** <https://community.particle.io/t/odd-analog-readings-solved/906>\
**Category:** Troubleshooting\
**Created:** [December 22, 2013, 3:04am UTC](https://community.particle.io/t/odd-analog-readings-solved/906 "2013-12-22T03:04:25Z")\
**Posts on this page:** 1\
**Showing post:** 31

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**Author:** ![americanmcgee](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/americanmcgee/32/99_2.png) [@americanmcgee](https://community.particle.io/u/americanmcgee)\
**Post date:** [January 1, 2014, 5:49am UTC](https://community.particle.io/t/odd-analog-readings-solved/906/31 "2014-01-01T05:49:40Z")

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Was having the same issue of wildly swinging values reading TMP36 from A4. Fixed it with a 0.1uF cap.

See before and after images for data collected at A4 attached to TMP36. “Before” is without a 0.1uF cap from A4 to GND - values swinging wildly in a range of 19c to 27c. With a cap everything smooths out. The “before” picture reminds me of line noise seen on my scope, a common issue when building stuff on a breadboard.

Images posted on imgur [HERE](http://imgur.com/a/Dzk1j).

Moral of the story (for my problems at least) - add a cap, as suggested by BDub.

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_[View the full topic](https://community.particle.io/t/odd-analog-readings-solved/906)._