Connect 12V fan Via Relay to Arduino Uno

Using Arduino Project Guidance
#1

Hello everyone

Today i’m working (trying, to be precise) on a project to use a 12V Fan Via a Relay to my Arduino Uno

Just to let you all know, i haven’t got much knowledge on this at all…

I don’t have any Code to use, so i’d appreciate it if someone could post code for me to use.

I want to know what to connect to what, where must the relay and fan be connected to, also how XD

This is what i have:
1 X Arduino UNO R3
1 X Relay (don’t know what type it is… lol)
1 X 12V Fan
1 X 12V Power Supply (external power source for the fan/relay)
1 X Breadboard

Please have a look at what i have, from the image posted.

—Ryner

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#2

Hello, I am trying to accomplish a similar project but I have -0 knowledge of this Arduino stuff...

can you and/or anyone point in the right direction? (complete and utter noob)

I would like to make a 12volt - 14.4 volt thermostatically controlled fan relay for an automobile with A/C trigger.

I have used MANY different hardware type of PWM's and all have FAILED. Would like to try something new.

Thank you in advance.

#3

Ditch the relay look at MOSFET's in the playground. A 12V fan should not be controlled via a relay. You could also look at motor controllers. There is one in the products section here that should do the job!.

Relays are for fools.

Mark

#4

Ditch the relay look at MOSFET's in the playground. A 12V fan should not be controlled via a relay. Relays are for fools.

I hope you are joking with that BS. :slight_smile:

#5

This tutorial shows how to run a motor from a transistor, and here is how to switch a relay with a transistor.

Since it seems one should use a transistor to switch a relay, you might as well just use the transistor to switch the motor, unless the motor is so huge that it is beyond the capabilities of the transistor and actually needs a relay.

I love those UMass tuts- the schematics and photos are cool 8)

#6

Relays can electrically isolate the arduino from the load being switched. Transistors maybe not so much.

#7