Hi

I have a Pioneer radio with a 5v DC output and I have installed in the back of my cabinet 3 12v PC fans (for cooling purposes) These are activated with a wall switch. I would like to have, (when I switch on the radio) the 5v output of the radio to trigger a 5v-12v trigger relay that I bought already, so that the fans will come on automatically. I have been trying to connect the leads of a 12v DC output to the relay but since I am no genius.
IT DOES NOT WORK....

Here is a somewhat image of the switch, mine has no signs. all I know is that the 5v leads are separate.

http://dmohankumar.files.wordpress.com/2012/04/5v-spdt-relay-connection.jpg

Question: Where do I connect the 12v input leads and also where do I connect the output ones for the load.

Maybe a simple problem

Thk

NormL

 

A and B get the 5 volts. 1 and 3 form a single pole switch, and that is all that is necessary to run the 12V to the fans. The 3 fans will have a second wire for, "ground" or, "common" of the 12 volt supply. There is no need to switch those wires on and off. Just leave them connected.

 

It may be advisable to use both contacts by paralleling them, I think they are a bit over confident on the rating, they seem really small relays to have 8amp rating, if anything this will be a resistive load, any thing slightly inductive would be better to use both contacts if the other is free?
Max.

 

Tks guys

Will check it out