Skybound
Well-Known Member
You know when just the act of blathering about something helps you better understand the issue you’re talking about?
I think the dehumidifier basically fills the function of that type of circuit you’re talking about - since it tends to bring the RH of the room down to around 60 eventually and whatever is in the drying box is going to follow (providing everything is working properly). The big variable is the time it takes the weed in the drying box to get there. It varies depending on the outside weather conditions, but also hugely on how full the drying box is. If I cram the box full I’m inviting mold. If I have a small harvest it dries a little too fast. And I’m not so sure how to control that rate of drying other than with the hillbilly methods I use now - plugging/opening vent holes and tweaking the fan. It would be cool if I could hook a little fan up to a program that dropped the RH by a couple points a day and took it down slowly in a controlled fashion. Without me having to change the settings by hand each day, cause I usually don’t have time for that.
Now that I think about it- that sort of program is hardly very advanced. Is this the sort of thing an arduino could do, in the hands of someone who doesn’t want to spend a month learning how to make it go?
I think I’ll go attempt to google that now...
Oh God yeah! Your google search will help you get the gist easily as there's plenty of those types of builds with circuits and code on the web already. My code that I wrote years ago already had that functionality built in, though it was for entire bloom rooms which had different criteria. What I was suggesting basically was to blow a fan straight onto the buds to get RH for 100% down to the high 60s, at which point you wouldn't want the fan blowing directly for too long. In code, you (me, someone else) can create all kinds of rules to follow like duration in time since last reading, to better create the overall functionality you're wanting to produce, then it all becomes set it and forget it.
FYI, micro controllers just querry one or more sensors, then does something with that information. I got a little nuts with it and linked everything to my phone so I could monitor or control things from anywhere on the internet. That extended functionality opened me up to additional liabilities, but it does better showcase the possibilities.
Depending your budget, I suggest an Arduino Uno or Mega, one or more DHT11 or DHT22 temp/humidity sensors and as many PC fans as you want to control. If the PC fans are powered from mains voltage, you'll need "Sainsmart relay modules" to control them. If the fans are powered by 12 volts, simple transistor circuits can be put together. FWIW, these are the same exact transistor circuits I put together to run my peristaltic pumps for accurate dosing of nutes.
All the electronics stuff aside, when I initially hang everything on hangers, I heng them all from a bloom fixture that gets good sweeping wind from the bloom fan and for 2-3 days, this whisks away most of the RH. I then pull all of the hanging branches from the hangers and put all the small bud branches into a long tote while sorting the fat bud branches onto another hanger so when the small buds are in for their first sweating, the fat buds go back in front of the fan for another day or two. This I find get me an even dry, and during the arid winter months I don't over dry a chop.