Adverse

i used my dad's meter and with the load it read 13.6 i think. BTW i'm only running one fan now.

OK, here's the deal now: I have the fan hooked up to a 13.8V Regulated power source with a multi-resistor switch in the circuit. The thing is, on the lowest setting the fan still runs too fast. In addition to this, the fan stops intermittently only to restart when i touch the power source or switch... Would lowering the voltage of the power source (getting a diff one) be a better way to regulate the rpm of the fan? Thanks a lot!!

If i could obtain a reliable meter or it turns out that mine is OK, could i use the train transformer?

How would i test my meter?? Should i just try to measure the voltage coming from my wall outlet?

Hey again, I found something i think will work for these fans. I have a Troller Transistorized "Autopulse Transpak 2.5". It is a transformer for a model train set. It has an output on the back that says "Variable DC 0-12V Track 1". However, when i use my meter to test the actual voltage, it reads as high as ~55V. It uses a knob to change the Voltage. I can set it at 12V exactly, but the fan seems a bit weak at this voltage. WHy does it say 0-12 when it can go way higher? THe fan is 0.09A, but the transformer doesn't say anything about current... I don't want to burn the fan out or start a fire... How high can i set the voltage without increasing risk of fire or significantly reducing the life of the fan? Why does the fan seem so weak? At 12V it actually needs a push start to start spinning. Thanks again

Thanks!

I'm in Atlantic Canada, so maybe i'll pick up a switch somewhere. So you say an ideal adapter would be a 10V 0.05A? Wouls this be available at Radio Shack? I'd prefer to buy independant, but maybe RS will have to do. What do you think about the ground situation?

I'm looking to find a timer circuit that can turn a fan on for around 5-10 min 3 times an hour. I've heard of 555 circuits, but really don't know where to start making one, or where to get the gizmos. I would just buy one from the store, but the smallest increments i could find was for a lamp timer, which is ok, but the increments are on for 30 min off for 30 min. Is there an easier way to do this than a 555 timer circuit? Thanks a lot!

I'm going to be using the fans to ventilate a small greenhouse. There will be a fair amount of water near the work area due to the high humidity in the greenhouse, so i'm guessing i should ground the suckers, right? The adapter i am using is a Nokia cell phone adapter for charging the battery. Here is what it says on the wart: ACP-12U Input: AC 100-240V/ 50-60Hz/180 mA Output: DC 5.7V/800mA, For ITE use only. The fans i plan to use are 2 EC5010 12V DC/0.09A/1.2W When i used my meter on the adapter it read 23.7V. I'm guessing that this has to do with a regulator in the cell phone, bringing it down to 5.7V? I tried to wire these 2 fans in series, hoping that the combined voltage of 24V would work with this adapter (i have no idea if this is the way it really works, please correct my logic), but only one of the fans would run. I tried them paralell next and both fans ran fine. WHen i checked the voltage using my meter this time it read 23.7V. I am now wondering: Is this going to start a fire? Will this burn out the fans or the adapter? Is it a hazard of any other type? Also, how much does a 4 way swich cost usually? Thanks again for all the help!!!

Also, should i test the voltage of the adapter when plugged into the wall? From reading a few posts, its apparent that the Voltage is rarely what is written on the adapter. I don't want to burn the fan out. Would it be possible to add a variable resistor to control the rpm of the fan? The model number of the fan turns out to be EC5010, i checked that datasheet link out but nothing happened. If i can add a var resistor, should it be within any specifications? For ex: Voltage, amperes, etc?

Thanks for the welcome btw! ;D

Thanks for the quick response! However, upon closer inspection, the fan i have in my possession says 12v, it is a similar model to the one in the picture though. Where would attach the ground wire once confirmed? Also, when i use my mmeter, what will the ohms tell me? If i get a reading from the red and black, then they're pos and neg? If i get no reading then i've got one of the ground wires?

Sorry for asking this super-simple question, but i'm looking to hook up this computer fan to an AC adapter :http://www.aocusa.com/pview.php?g=PC%20Cooling&c=FANS%20(DC,%20AC,%205V)&sc=50/52%20mm%20DC&model=FAN-5510-S-3T-L It has 3 wires, however. red, yellow and black. It is a 12V fan. What wires should i use? is one of these wires a ground? Thanks in advance