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From: cgordon@vpnet.chi.il.us (Crash Gordon)
Newsgroups: sci.electronics
Subject: Remote Garage Door Opener
Keywords: remote
Message-ID: <2727284e-4dc.1sci.electronics-1@vpnet.chi.il.us>
Date: 25 Oct 90 21:55:03 GMT
References: <2396@kiwi.mpr.ca>
Lines: 17


>Author: [Randy Howe]
>I need to build a device similar to a remote garage door opener. I
>want a small portable rf transmitter that sends a coded transmission
>to a receiver which verifies the proper code and then turns on a
>relay.

Motorola (and others) make various chips intended for use in IR remote
controls which could probably be used over RF instead.  You'd need to add a
4-bit controller or something like that to read the codes...

Also, I've seen ads (in ECN, I think) for someone selling keychain
transmitter systems like the ones used for car alarms.  They're targeting
OEMs, not end users, price for XMTR/RCVR pair was around $80.

-----------------------------------------------------
Gordon S. Hlavenka            cgordon@vpnet.chi.il.us
Disclaimer:                Yeah, I said it.  So what?