Help with a Switch

[calzo]

Hello, i was wondering if anybody could help me but i have a problem. What i'm wondering is does anybody know of a momentary switch that could be programmed to stay pressed for a short time (around 0.75s) and then simply stop? Any help would be appreciated.
oh and reason for this i've had an idea for my xbox 360 controller. Thanks, tom.

 

[Grossel]

Hi.

That will be a timer circuit and a relay.

 

[calzo]

Thanks for the reply. Do you have any idea how i can integrate this into an xbox 360 controller? What i'm looking to do is to add a momentary switch to the controller motherboard to the "B" button and then get a current from soldering the other part of the cable to the LED. How could i add a timer circuit relay to the circuit so when i press the momentary switch the B button will remain pressed for 0.75 seconds?