Please help!! How to make a basic switch

[Craterloads]

Hi, Trying to figure out how to make a switch that either supplies 12v or 5v to my fan controller. Dont have a clue what type of switch i need but would like a push button type.

This is the basic jist of what i need to do




Ive read that best would be a "break before make switch"

 

[Craterloads]

Awesum mate, do you know if it would work with a vandal type push button type switch

 

[Craterloads]

something like this

 

[Craterloads]

Do you mean vandal resistant style

http://uk.farnell.com/bulgin/mpl027/vandal-resistant-switch/dp/9638482

yes like that

 

[Craterloads]

thats perfect, just plain metal finish no leds. would that actually work though for this.

 

[Craterloads]

That looks like a momentry switch.

You need a a DPDT switch.

Wouldnt i need a SPCO switch,

http://en.wikipedia.org/wiki/Switch

i dont have a clue tbh

 

[Craterloads]

Any Single pole, double throw SPDT switch will do you for that job.
A diagram of how the switch works can be found here
http://en.wikipedia.org/wiki/Switch

It should be fine

Why do you want to do this though?

When connecting 12v to fan controller i can only control between 5v-12v
when connecting 5v to fan controller i can control between 1v-5v

so basically allows me to reduce speed further when neccesary

Could you link me a suitable switch please, im a complete noob in this field

 

[Craterloads]

Ok cool, just to clarify with a switch like this would in be a 3pin switch

eg
pin 1 - 12v
pin 2 - 5v
pin 3 - output

or is it more complicated than that

 

[Craterloads]

great, that paticular ones out of stock. Will this work

http://uk.farnell.com/bulgin/mpl038/vandal-resistant-switch/dp/9638512

or is there anything cheaper i could use but with similur style

Thank a lot for the help, owe you one!!