Talking with @joeatkin2 and @lewisss came out that a dust sensor in the wood workshop would be a great way to turn off the Noisy Fan when is not needed, recently I found a dust sensor (Sharp GP2Y1010AU0F) that can sense between 0 and 0.8 mg/m3 .
The idea is to have an LED matrix to display the readings , a relay to turn on and of the fan and would be good to have wifi to upload the readings.
The question is:
Do we have any kind of favourite gateway to upload the reading? like an official thingspeak channel?
This would be a great idea. It would also be worth seeing if we can track if the air quality drops below acceptable levels: having clean filters in the box makes a massive difference, and I guess it would be helpful to track when they need changing.
I also have a sharp dust sensor somewhere - I planned to do something similar for my workshop but its just on an ever increasing To Do list. will see if I can dig it out.
I think the system we have is just about keeping up with the load - once we complete whatever plan is proposed to capture the fines at source (at the extractor) by boxing it in or whatever I’m sure it will be great.