Ever have that urge to solve a problem just cause it exists and because you can?
While working on my K40 I thought the fan was running and it was not. Its pretty quiet and down below the machine. Turns out I had a problem with an AC connector.
I set off to design a sensor and this is what the results were …
… ya it got out of control!
O my, did you actually do any planning or was it all on the fly lol.
mental planning then just hacking …
But you know what, it works. That’s all that matters and I’m sure you will get the urge at some point to revisit and refine it. Good job I say. 
@Andy_Shilling this one is done, spent to much time on it …
@donkjr Oh Don! We need to find you some better projects for your time and talents. I’d need to get that Peltier cooling schematic posted fast! - grin
Love it,I am working on air fow switch /alarm and fire alarm for My sh g350,WA set back a few weeks with other faults hope to post soon
@Steve_Clark no kidding… Btw wanted to use a microswitch but it took to much force and to big a sail. So went to hall effect. Side benefit is you can see the amount of air by the lever position lol.
