artificial-nose
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Consider replacing MOSFET with proper DC motor controller
Right now the fan is either off or full speed. It's far from ideal as it's causing the sensors to have a hard time picking up the smells. Having a more gentle airflow would likely help a lot
I use this for my ESP project, but the controllers work with a generic I2C interface
Thanks for the hint! I was considering looking at https://www.seeedstudio.com/Grove-I2C-Mini-Motor-Driver.html mostly because Grove connectors are super convenient, and it also looks like it has a really small form factor.
If you end up integration the TB6612FNG based controller I would love to see a pull request! :-)
There's simplefoc too