Copyright: 1996 - 2024
BSEE - KB3UON
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.
Below are the old forum threads, including responses to the original posts.
|-- Amateur Radio
Gripes & Humor
-- CAE, CAD, &
Test & Measurement
Post subject: replacing a photo sensor with RF Posted: Thu
Apr 12, 2007 7:28 pm
Joined: Wed Nov 02, 2005
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
...or even a garage
Post subject: Posted: Wed
Apr 18, 2007 4:06 pm
Joined: Mon Jun 27,
2005 2:02 pm
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.
Post subject: Please contact RF CafePosted: Tue May 15, 2007 9:07
Joined: Sun Aug 03, 2003 2:02 pm
Location: Erie, PA
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