Article View: sci.electronics
Article #4545Re: IR remote controls
From: Mary Winters
Date: Tue, 10 Apr 1990 01:54
Date: Tue, 10 Apr 1990 01:54
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>>That will only work if the remote uses somewhere near 40kHz for it's carrier >>frequency. > >Very true. Fortunately all the remotes I've tested do. I think that this is >fairly universal. Now, the obvious followup question: How do I construct a simple 40kHz IR LED flasher which I can turn on and off with a TTL signal (such as a parallel output line from a computer)? Yes, I admit it, I'm a total novice WRT the hardware aspects of electronics. If someone has a schematic for a working carrier generator of this sort, I'd be very appreciative if you could send it to me (in what format to send it is another good question, but I'll save that one for later (-:) Thanks! -Yet Another Hardware Hacker WannaBe. -- uv@f69.n233.z1.fidonet.org Suffering from PMS (Presentation Manager Syndrome)
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uwm.edu!ux1.cso.uiuc.edu!uxa.cso.uiuc.edu!mjw06513 From: mjw06513@uxa.cso.uiuc.edu (Mary Winters) Newsgroups: sci.electronics Subject: Re: IR remote controls Summary: How do I do it? Message-ID: <1990Apr10.015413.29106@ux1.cso.uiuc.edu> Date: 10 Apr 90 01:54:13 GMT References: <102.261CF0A4@ofa123.FIDONET.ORG> <4023@sage.cc.purdue.edu> Sender: usenet@ux1.cso.uiuc.edu (News) Organization: University of Illinois at Urbana Lines: 22