Looking for someone who knows relay switches

[RooTxBeeR]

Looking to get 4 of these http://www.sonicelectronix.com/item_38996_Xscorpion-FAN3.html and would like to have a switch that would go half speed/full speed.

[Purplehaze]

Is that fan variable speed? Looks like it may be a single speed motor, you may wanna look for one that says dual speeds.

I could be wrong but don't think so...

[bassface]

all the relay would do is activate it, you would have to install some sort of pot to make the fan variable.

[Purplehaze]

Yep I was right, single speed fan.

Not a bad price on those at all... May have to grab a few also

Edit: Yeah what he said, a potentiometer is what you would need to adjust the speed.

Can I ask why you want to adjust their speed?

Edited May 16, 2012 by Purplehaze

[vibrator]

you can get them with the 3 wires and hook it up to a 3 way switch.but with .15 amp draw its not going to be pushing much air anyway.

[RooTxBeeR]

Well I was under the impression, depending on how you wire a pair to the battery dictates the Voltage it receives. Was seeing if there is a way I can wire them to a switch, so one way is Series and other is Parallel so one is higher than the other. Or will that not work and I have to do what you guys where saying?

[RooTxBeeR]

Im no pro, but I wonder if something like this would work when trying to change the fan speed.

http://www.ebay.com/...=item4ab795c025

Actually that could probably work.

[bassface]

yeah that would work, the wiring of the relay would be the normal way though, have your remote switch from hu activate the relay coil, other side of coil to ground, Then use 12v from battery to NO1, C1 to fans. NO2 to 12v, C2 to the remote turn ons of the amps or devices you wish to turn on besides the fan. To install the pot, wire it in between the relay and the fans. As far as wanting to just wire the fans 2 different ways, it would require a 2nd relay plus a switch, I think the 1 relay pot is a much simpler and better way to do it, you will have more control over speed. Personally though I would just forget the pot and just wire them up with the relay.

Edited May 16, 2012 by bassface

[RooTxBeeR]

yeah that would work, the wiring of the relay would be the normal way though, have your remote switch from hu activate the relay coil, other side of coil to ground, Then use 12v from battery to NO1, C1 to fans. NO2 to 12v, C2 to the remote turn ons of the amps or devices you wish to turn on besides the fan. To install the pot, wire it in between the relay and the fans. As far as wanting to just wire the fans 2 different ways, it would require a 2nd relay plus a switch, I think the 1 relay pot is a much simpler and better way to do it, you will have more control over speed. Personally though I would just forget the pot and just wire them up with the relay.

Did you even read what am trying to do? I am only trying to put a switch on the fans, nothing else. I am just going to wire all the fans to the battery solo, full speed.

[kickass audio]

Do you know how to wire a relay? Not trying to bash you or anything just wanted to make sure. You would wire the relay like normal so that it has a live power and constant ground and then the switchable wire of the relay that tells it when to energize or de-energize the coil of the relay would go to a toggle switch for you. Then you can get a potentiometer like the one listed before for the light dimming or even fab one up by getting one at radioshack. I would think something like this would be PERFECT for you: http://www.radioshac...=Potentiometers

You can make it so that when you push the button it will either energize the coil of the relay or disable it and then you can make it so that when you turn the knob whichever way you set it up that it will raise or lower the speed of your fan.

Last thing you can do is like was mentioned earlier is get a fan that has 3 wires. The reason for the three wires is that one is a ground and one will be like half-speed and the other will be full speed. Lets say your fan has 4 brushes in it (i think they are called brushes but they are what sends the rotating electrical energy to spin the fan, if someone knows the name of it please chime in), the half power wire will only energize 2 of the 4 brushes thus holding back from full output. Now if you energize the full speed wire of the fan all 4 brushes will be activated and make it spin as fast as possible.

The choice is yours for how you want to hook it up and run it but i really dont see much of a need to get the potentiometer involved in the mix. I would get a variable speed fan, 2 relays (one to wire up for half speed and another to wire up for full speed) and then get a 3 way momentary switch. The switch will be wired up so that one position will be off, another for half speed and another for full speed. It sounds complicated but its super easy to achieve what you want.

Edit: im sorry for that variable speed part. Please forgive. Not too sure if you want a visual indicator to remind you that the fans are engaged or not but you can get a simple 2 way toggle switch with or without a light to tell you if its on or not. Just wire the relay up normal but for connector # 86 on the relay you will run constant power to this and then in the middle of that wire you will wire up your 2 way switch. I would recommend to use the remote output of your headunit or even an accessory wire on your vehicle that turns off when the key is removed just to help ensure you dont leave the fans running when you park your vehicle. If you keep it so that the wire 86 on the relay is an always live wire then you can take the chance to make it so that you forget to flip the switch when you get out of your car and keep the fans running. by using a wire that isnt always live (the acc wire for your radio for example) you can make it so that if the key is turned then you can engage or disengage the switch to power the fans however once the key is turned to off and removed your fans will be killed regardless of where you keep the switch.

Edited May 16, 2012 by kickass audio