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Electronics => Electronics => Topic started by: yoamocuy on April 08, 2011, 01:29:36 PM

Title: Interfacing relay switch with RF receiver?
Post by: yoamocuy on April 08, 2011, 01:29:36 PM

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?

Title: Re: Interfacing relay switch with RF receiver?
Post by: rbtying on April 08, 2011, 02:04:06 PM

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

Title: Re: Interfacing relay switch with RF receiver?
Post by: yoamocuy on April 08, 2011, 04:33:24 PM

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?

Title: Re: Interfacing relay switch with RF receiver?
Post by: rbtying on April 08, 2011, 04:50:53 PM

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.