Interfacing relay switch with RF receiver?

[yoamocuy]

Hey, I was thinking about using a relay switch for something but I'm not exactly sure how to modify it so that I can hook it into the RF receiver.  Is it possible to interface a regular relay switch with RF without buying a set of RF relays?

[rbtying]

You can use an R-C circuit to integrate the PWM signal (making it analog), and then a comparator (or a Schmitt trigger) to make sure it triggers at the point you want it to.

http://www.societyofrobots.com/remote_control_robot.shtml
http://www.societyofrobots.com/member_tutorials/node/83

[yoamocuy]

Ok, so if I did that, that circuit set up would act as a relay so I wouldn't need to actually use one correct?

[rbtying]

You'd still want a relay (or a MOSFET) to switch higher currents - all that circuit does is convert the joystick position received to a binary on or off.