# Fan pin J13 J14 polarity on v1.4 LimeSDR?

**URL:** <https://discourse.myriadrf.org/t/fan-pin-j13-j14-polarity-on-v1-4-limesdr/1539>\
**Category:** LimeSDR\
**Created:** [31 July 2017 12:33 UTC](https://discourse.myriadrf.org/t/fan-pin-j13-j14-polarity-on-v1-4-limesdr/1539 "2017-07-31T12:33:16Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![luftek](https://avatars.discourse-cdn.com/v4/letter/l/e79b87/32.png) [@luftek](https://discourse.myriadrf.org/u/luftek)\
**Post date:** [31 July 2017 16:03 UTC](https://discourse.myriadrf.org/t/fan-pin-j13-j14-polarity-on-v1-4-limesdr/1539/2 "2017-07-31T16:03:33Z")

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[Cooling recommendations?](https://discourse.myriadrf.org/t/cooling-recommendations/774) check whole, many photos and instructions  
Also you can operate fan output manually, through spi commands

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_[View the full topic](https://discourse.myriadrf.org/t/fan-pin-j13-j14-polarity-on-v1-4-limesdr/1539)._