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replacing a photo sensor with RF - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.

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


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.


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


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


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.


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.

- Kirt Blattenberger
RF Cafe Progenitor & Webmaster

Posted  11/12/2012
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