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Copyright: 1996 - 2024
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    Kirt Blattenberger,

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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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replacing a photo sensor with RF - RF Cafe Forums

RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2010, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. If the folks at phpBB would release a version with integrated sign-in from the major social media platforms, I would resurrect the RF Cafe Forums, but until then it is probably not worth the effort. Regardless, there are still lots of great posts in the archive that ware worth looking at.

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wsemajb
Post subject: replacing a photo sensor with RF Posted: Thu Apr 12, 2007 7:28 pm

Captain

Joined: Wed Nov 02, 2005 1:50 pm
Posts: 11
What is required to replace a small board mounted photo sensor with an RF trigger? I'm just having fun with a little project and would like to use something cheap and near at hand like a baby monitor or walkie-talkie to activate a board that is presently activated by a board mounted two pin photo sensor.


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wsemajb
Post subject: Posted: Thu Apr 12, 2007 7:28 pm

Captain

Joined: Wed Nov 02, 2005 1:50 pm
Posts: 11
...or even a garage door opener?


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IR
Post subject: Posted: Wed Apr 18, 2007 4:06 pm

Site Admin


Joined: Mon Jun 27, 2005 2:02 pm
Posts: 373
Location: Germany
If I understand you correctly, you will basically need a transmitter and receiver. There are IC's of this kind operating in the ISM freuqncy bands for example 434MHz, 868MHz, 915MHz etc. The receiver will detect the transmitted signal and generate a trigger that will operate/enable your circuit.

Hope this helps.


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Kirt Blattenberger
Post subject: Please contact RF CafePosted: Tue May 15, 2007 9:07 am

Site Admin


Joined: Sun Aug 03, 2003 2:02 pm
Posts: 308
Location: Erie, PA
Greetings wsemajb:

You have been selected as a winner in the April 2007 Forum drawing. I sent an e-mail to your registration address, but have not received a reply yet. Please contact me at the e-mail on the Contact Us link in the upper right of the page.

I put a notice in the "Win a Free RF Cafe T-Shirt or Mug" forum. Thanks.

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RF Cafe Progenitor & Webmaster






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