Triggering relay with 12v

[pbolger]

Apologies for asking a really basic question, but...

I have a rotating speaker box which requires a mains (240v ac) current to be switched via a latching footswitch to power the rotator motor. My plan is to use a small 12v psu to switch the relay. My problem is that when the footswitch closes the 12v circuit will be a dead short, and I suspect this will fry the psu rather quickly. What do I need to add to the circuit to stop this happening?

 

[donkey]

if you are really concerned, try adding a LED and resistor. this will give the added knowledge the switch is working and the circuit is closed

 

[duke37]

Draw your circuit showing the relay and the 12V power supply.

 

[pbolger]

Thanks

That was quick! I'll give it a go.

 

[Rleo6965]

Small 12V relay solenoid only consumes 30ma. to activate it. This will not fry your psu. Unless you wrongly wire it.

Show us your diagram. We might help.

 

[pbolger]

Small 12V relay solenoid only consumes 30ma. to activate it. This will not fry your psu. Unless you wrongly wire it.

Show us your diagram. We might help.

Thanks. Diagram attached. Please excuse my rather quick and dirty artwork...

It's quite simple, just not sure if shorting the 12v supply is going to be a problem.

 

[CocaCola]

It's quite simple, just not sure if shorting the 12v supply is going to be a problem.

You are not shorting it, the coil in the relay provides a load...

 

[pbolger]

You are not shorting it, the coil in the relay provides a load...

Good. Better to ask than wait for that burning smell!

 

[davenn]

Good. Better to ask than wait for that burning smell!

awwww -- where's your sense of adventure ( just teasing)

Dave