How much current for 12V trigger?

[tme]

Hi, I want to connect a trigger from my Marantz receiver to a Rotel 1075. The receiver has a switched 120V AC outlet. I was going to buy a 12V DC power adaptor and connect a 3.5mm adaptor on the end. How much current does this adaptor need to provide to make the trigger work? 200ma? 500?

Thanks!

[DrBoom]

Being creative are we ?

A 12V trigger input usually requires somewhere from 5 to 25 mA, definitely not more, so virtually any 12V DC adaptor you can find will do fine.

[Hd4life]

I was interested in installing two 12v computer fans in the back of my rack, could I use the 12v trigers to run those fans...?

[tme]

Thanks DrBoom

[Kevin D]

HD:

If doing it the way Tme is, then yes you can use the 12v power supply to run some fans. However if you meant straight out of a 12v trigger to the fans than no, no where near enough current.

You could use the 12v trigger to click a relay on and off. Wire the 12v trigger to the coil and then use a 12v power supply ran through the relay to power the fans..

Kevin D.

[Bostonears]

I was interested in installing two 12v computer fans in the back of my rack, could I use the 12v trigers to run those fans...?

For anyone considering the use of computer fans in a home theater system, fan noise will be a concern. The company Antec makes a series of computer fans called SmartCool. These have built-in temperature sensors which reduce the speed of the fan when the air temp is fairly low. I've got one in my PC, and it runs MUCH quieter than the stock fan.

[Kevin D]

If you are good with circuits, you can build your own controller for about $15 in parts.

Kevin D.