Having problems with my Promenea

[Discus]

Camille - you should be able to get 12V computer "muffin" fans really easily; you can then get a cheap 5-12DC adapter and wire them up. If there aren't any computer shops where you live, then they're super-easy to find online.

If you have a variable voltage DC power supply, you have some control over the speed of the fan(s).
See if you can find 120mm or larger sizes; 80mm are the most common. Also see if there is a dB rating on them (loudness) - some can be quite annoying!

re: the cinnamon/alcohol thing, why don't people simply make a tincture by steeping the cinnamon directly in alcohol?

[camille1585]

I gave up with finding muffin fans long ago. Shops that sell computers just don't sell those things. As for looking on internet, I don't even know what a muffin fan is in Dutch! Last year when I was searching on Ebay with English words, I did find one (with variable speed), but it was costing nearly 30€!

[Discus]

two seconds with google and knowing how the minds of people that sell PCs works and I present you with:
Case Cooling

[camille1585]

Now to find the adaptors for them! I'll hunt around.

[Discus]

Otherwise, you can try RS components who will sell you pretty much any voltage you want, and even mains voltage AC ones.
Axial Fans | Buy Axial Fans & other Fans and Thermal Management parts | RS Components

---------- Post added at 05:57 PM ---------- Previous post was at 05:55 PM ----------

re: your 12V adaptor, you want something like
Netadaptor & Lader :: Adaptor AC-DC :: Minwa 500 ma universele AC-DC netadaptor 1.5 tot 12 volt schakelbaar, MW17GS - Level Electronica .nl Webshop

[camille1585]

Awesome!!
So I supposed that I just cut off the end on the cord and splice the wires of the adaptor and fan?

[Discus]

Exactly! And being low voltage, you don't need to worry too much about getting shocked.
If you want more control over your fans, they sell dedicated rheostats for PC fans (Functional Panels), but that's overkill and unecessary expense IMO - just switching somewhere between 1.5V and 12V on the transformer unit should find a level you're more or less happy with, and you can always move the fan further away or at a different angle if it's still a bit fierce. Also, those units will expect a PC power supply with a Molex connector supplying 5V and 12V rails, and will be a bit of a PITA to finagle into working with a 12V adaptor (although I suspect you could persuade most of them to work if you're happy around a soldering iron).

[camille1585]

This is going to be much much cheaper than any of the fans I found on terrarium supply sites! Those are going for 30-40€, and I'm not ready to put that much money into a fan, or all things. Even though one is quite nice, it has a temperature sensor and adjusts fan speed accordingly. But that's better suited for a terrarium.

Splicing wires and covering with electrical tape is within my capabilities!

[Discus]

Oh, if you want to, you can also wire up several of those fans in either series or parallel to one adaptor if you need more airflow. I'd suggest parallel, although series will tend to reduce the velocity of all of the fans if that's what you're after. You could cable tie several of them together to make a tall fan that will blow across your whole windowsill area/light stand at all levels. If the fans get a bit slow, or the adaptor gets worryingly hot, get another transformer to power some of the fans; of course, one adapter per fan gives you more control, but the wiring gets messy, not to mention it costs a lot more.

---------- Post added at 06:20 PM ---------- Previous post was at 06:17 PM ----------

You can get PC fans that have small temperature sensors in them (thermocouples), but they're not usually something you can adjust - they're set for temperatures PCs are happy with (i.e. typically start blowing like hell anywhere over 25 degrees C). I'd rather adjust manually.
If at some stage you want to look at automating fans based on temperature and/or humidity, you can do so either with one of those herp control units, or with industrial electromechanical sensors (RS components will happily sell you what you need - I've bought both humidistat and thermostat from them to do just that in my growing area).

[camille1585]

hmm, I'll have to figure out how to do that! Google should be able to tell me how to wire them in parallel. That way I can have one on each shelf (2 shelves) off one adaptor. Seeing that the price of electricity is going up and up, that would be nice.