Electriacal people

[slick]

What kind of restricter do I need for a 4 inch computer fan? I can't hook it up to wall current.

 

[trebor126]

I bought a 12vdc fan from Radioshack and the transformer.
Since the power in the house is AC and the fan is DC, the guy at the store told me I had to buy a node to put in the circuit line. Is this correct?
I wired it like he told me, but I just don;t want anything to blow up

 

[hartkarl]

what do you mean by node? the transformer should already convert the ac to dc volts if it is a ac to dc transformer. that shouild be all you need.

 

[trebor126]

Sorry, I wrote the wrong word.
The transformer is an AC transformer, 120vac in and steps power down to 12.6 vac.
I was told to put in a diode, in line from one of the wires to the fan. This would convert the ac to dc for the fan.
I am not in anyway knowledgable about electronics in anyway, if you could not tell by my posts
Everything seems to be working fine, and not over heating, just didn't want any surprises.
So does the above config. sound ok? Will it fail in the future?
Thanks again

 

[gatorcsm]

Best thing to get is a variable transformer/rectifier. You can select anywhere from i believe 3.5v to 18v.
Don't worry about adding anything to it. No diodes or anything, most already have a full-wave bridge rectifier. Even if it only has a half wave rectifier, it won't matter for a fan.
Just splice the wires into the two for the fans, test it first to make sure you have the polarity right. If you get the variable ones, it has a switch to flop polarity.
Good luck. If you can, try to get vulcanizing tape for the first wrap of the splices, then use electrical tape over that. That will ensure a very waterproof seal.

 

[trebor126]

Thanks for the help!