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Replacing a Photo Sensor with RF - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement


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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