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Article #7996Remote Garage Door Opener
From: Crash Gordon
Date: Thu, 25 Oct 1990 21:55
Date: Thu, 25 Oct 1990 21:55
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>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?
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<2727284e-4dc.1sci.electronics-1@vpnet.chi.il.us>Path:
arc1-ca.pugleaf.net!utzoo!attcan!uunet!nih-csl!lhc!ncifcrf!haven!aplcen!uakari.primate.wisc.edu!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!tellab5!laidbak!obdient!vpnet!cgordonReferences:
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!nih-csl!lhc!ncifcrf!haven!aplcen!uakari.primate.wisc.edu!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!tellab5!laidbak!obdient!vpnet!cgordon 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