I am building a box with a fan in it the fan needs to run on 5VDC, 0.1A. I want it battery powerd but i have no clue on how to even begin. so if someone could give me some sort of help, i would love it!

this is what type fan it is. I think it is made for computers. Delta Electronics 5VDC Fan

 

You have your choice of 3 D-cells at 4.5 VDC nominal or 4 D-Cells at 6 VDC nominal. At that current draw you should have a few minutes anyway. As the batteries discharge there will be a point where the voltage will be 5 Volts. The fan motor will run a bit faster at 6 Volts and a bit slower at 4 volts. The good news is that you're unlikely to hurt anything.

 

So i will only get several minutes of battery life?
how many amps does a battery run at? i was hoping that the batterys would last several hours. is there any way to do this?





by the way this fan is only one inch square.

 

Hi,

You may have a small fan, but the 100 milliamp figure is fairly steep for most batteries. Even big D cells are not made for a continuous draw like that. Unless you just have to have the fan battery powered, think about getting a wall transformer.

 

How easy would that be to do? I just need this fan to run once or twice a day to remove humidity. If i had to plug it in it wouldnt be too bad.

My problem is not knowing where to start.
So what would i need for this project?

 

Using 4 NiMH rechargeable AA's will give you around 4.8 volts. A Fully charged bank of 4 x 2500mAH cells should run a 100 mA fan for close to a full day before you would have to recharge them.
BTW, have you checked if a small fan like that will shift the quantity of air required for your project..?

 

Yeah the box is less than a foot square and the fan moves 1.2 - 1.5 cfm so it should be well ventilated. If i were going to plug this box into the wall, what all would i need?
I guess what I'm asking for is, could someone build this for me on paper so i have step by step instructions to follow. I actually would like it to be a plug in device, you know plug it into the wall. That would save money plus make the box itself lighter. any diagrams or instructions on how to begin and what i need, would be great!

 

This is the fan.

My new avatar is the fan.





This is a slightly larger picture.

 

so i geuss I dont get no more help?

 

Go to www.sciplus.com and get their wall transformer #30844 @ $2.25. It's rated 5 VDC @ 160 ma. The connector is 3.5mm positive tip.

 

Thank you

wow that was simple

 

one more question where would i have to go to get the female end that would fit that wall plug you directed me to?

 

Probably, if you don´t want to strip the end of the wall plug cable and connect it straight by soldering.