It's that time of the year again..condensation.
Well i'm going on about 2 years running my painstakingly configured desktop rig in the trunk. Custom wood and acrylic case finished off with charcoal carpet, based on an old ATX chassis. Very cool case if I must say;) 98% of the time this beast boots up from hibernation in 14 seconds and runs better than my home computer.
The other 2% of the time, are on days like today. Cold nights that turn into sunny mornings. My trunk turns into a virtual greenhouse. The DSATX will usually supply power to the motherboard but it will fail to POST until the condensation is fully evaped via system fans. Today the DSATX wouldn't even turn on and I had to sit there with the trunk open to let it air out naturally. After 20 minutes the PSU would supply power, and went through the system drying routine. When all looked ok visually I hit the reset button and the computer booted up from hibernation as usual.
Obviously this needs to stop for countless reasons. While designing the whole thing, I had an exhaust system in mind using cabin air, but kind of put that on the back burner. Even if I hadn't, the computer would still be subjected to condensation when parked and I would still be forced to dry it out while driving on days like today, risking god knows what on power up.
What I really need is some sort of humidity sensor and relay that will kick on my auxiliary exhaust system when the humidity inside the case reaches a certain point. Or at the very least some sort of desiccant in the enclosure itself to prevent condensation from building up in the first place (which I did intend on including in the case during the build). The latter would probably be the easiest, but probably not as reliable as an automated exhaust system that nips the condensation in the bud if it begins to collect when the car is parked.
Can anyone please recommend some sort of humidity sensor/relay device that I can use to turn on aux. fans automatically? Google and ebay don't show me much with the keywords I'm choosing..