Has anyone found a good way to automatically turn-on an exhaust blower for a Speedy 300? I saw this helpful post:
http://www.sawmillcreek.org/showthre...23#post2314623
But we are measuring 0.0 Volts on all 5 of those pins (relative to each other, and to ground). Maybe that 5-pin connector has some intelligence to sense it is connected to an Atmos, and turns-off if not?
We can't plug both the Speedy and the exhaust blower into the same power strip because the 80W Speedy pulls nearly 20A by itself.
We just need most any DC or AC voltage (and only <30mA) to trigger this relay: https://www.adafruit.com/products/268
(We can do the voltage conversion down to 3-12 VDC).
We don't need the exhaust to go on only when the laser is on; it's fine and preferable if it goes on and stays on with the machine.
One idea is to tap off the halogen lights, but we don't want to modify the new machine (warranty). So my current best idea is a photocell or photoresistor in front of one of those lights -- an awkward solution but it could work.
Any tips appreciated.