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SportsShooter.com: Member Message Board

20 mile, 2,600 channel camera trigger
Robert Benson, Photographer
San Diego | CA | USA | Posted: 7:22 PM on 10.22.08
->> I made one! Read about it on my blog:
http://www.robertbenson.com/blog/archives/860
 This post is:  Informative (3) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Joe Gosen, Photographer
Ventura | CA | USA | Posted: 7:33 PM on 10.22.08
->> That's cool!
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Fraser Britton, Photographer
Ste Anne de Bellevue | QC | Canada | Posted: 8:16 PM on 10.22.08
->> That thing is fantastic. I can think of more than a few places that it would be extremely useful.
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Brian Tietz, Photographer
Fort Myers | FL | USA | Posted: 8:34 PM on 10.22.08
->> Thats Awesome! I tried that a few years ago and never got it to work, gave up and bought pocket wizards. Nice job!
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Kevin Clifford, Photographer
Reno | NV | United States | Posted: 8:57 PM on 10.22.08
->> You're going to get some big $$$$$$. Great Job! Way better than pocket wizards. I wonder how the pocket wizard feel about this because I feel like paying $200 and $300 for one transceiver a bit much compared to this. Can't wait to see this in action at the Super Bowl :)
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Chris Stanfield, Photographer, Photo Editor
Atlanta | GA | USA | Posted: 9:07 PM on 10.22.08
->> Bump,

I've seen a lot of technology in my career. Some before it was introduced to the public and I have to say...the potential here is huge. Well done. Gosh, I love smart people.
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Daniel Putz, Photographer
Jefferson | MD | USA | Posted: 9:13 PM on 10.22.08
->> I think it might be against FCC rules to transmit data (other than CTCSS and DCS) over the channels reserved for FRS or GMRS (the band used for those tiny radios). Though you'd probably never get caught since it isn't monitored well.
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Daniel Putz, Photographer
Jefferson | MD | USA | Posted: 9:15 PM on 10.22.08
->> Though, on second thought. You are essentially using the breaking of the squelch to trigger.
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

David Harpe, Photographer
Louisville | KY | USA | Posted: 9:26 PM on 10.22.08
->> On the FCC thing:
You might want to check Part 95 subpart 194:
http://edocket.access.gpo.gov/cfr_2004/octqtr/47cfr95.194.htm

"You may not attach any antenna, power amplifier, or other apparatus to an FRS unit that has not been FCC certified as part of that FRS unit. There are no exceptions to this rule and attaching any such apparatus to a FRS unit cancels the FCC certification and voids everyone's authority to operate the unit in the FRS."

In context it looks as if this paragraph refers to things associated with transmission (i.e. antenna, etc.). However it does not specifically state that in the subpart and it is quite explicit about the "no exceptions" part.

Also might want to check out part 193:
http://edocket.access.gpo.gov/cfr_2004/octqtr/47cfr95.193.htm

If you're only triggering on squelch break, you're probably fine. If you're transmitting a DTMF tone or something else to initiate the trigger, part 193 might apply.

Another thing you have to consider when you start selling electronic gear is FCC Part 15, which concerns interference produced by electronic devices. In your project, you need to make sure your device is covered by section 103:
http://frwebgate.access.gpo.gov/cgi-bin/get-cfr.cgi?title=47&part=15§io...

On the surface it does not appear to be exempt by section 103. This means you need to look at sections 101 thru 121 to make sure you have the appropriate certification for your device. Here's a good overview of Part 15 issues:
http://www.ce-mag.com/99arg/gubish31.html

Cool project, but I wouldn't get my hopes up on the patent thing. There have been squelch-based relays used for triggering tape recorders and other devices connected to radios since the 1940's.
 This post is:  Informative (2) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Sam Hodgson, Photographer, Photo Editor
San Diego | CA | United States | Posted: 9:57 PM on 10.22.08
->> whoa. good job dude.
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Brian Schneider, Student/Intern, Photographer
Clemson | SC | | Posted: 10:01 PM on 10.22.08
->> That is pretty cool, I thought it was a joke when I saw the headline.
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Eric Canha, Photographer
Brockton | MA | United States | Posted: 10:29 PM on 10.22.08
->> I have agree with Dave your marketing of the device may have you running foul of the law. Frequencies are allocated for uses and using frs or gmrs for something other than the uses specified within the fcc's use for that band could get you in hot water.

At the very least you may want to run your ad by an lawyer. No doubt that the 'competition' will have no qualms about bringing this to the attention of agencies that have jurisdiction.


On a brighter note, very cool.
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Daniel Putz, Photographer
Jefferson | MD | USA | Posted: 10:57 PM on 10.22.08
->> I'm tempted to try this with my 2-meter band stuff... (yes, I DO have an FCC license for Amateur ). Hrmmmmmmm.
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Robert Benson, Photographer
San Diego | CA | USA | Posted: 11:08 PM on 10.22.08
->> Daniel: It will work there as well. Or will cell phones.
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Brian Leddy, Photographer
Gallup | NM | United States | Posted: 12:23 AM on 10.23.08
->> Wow. That is really cool. Good work!
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Steve Gengler, Photographer
Philadelphia | Pa | USA | Posted: 1:05 AM on 10.23.08
->> 22 channels x 100 subchannels = 2,200 not 22,000 doesn't it? either way still cool
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Robert Benson, Photographer
San Diego | CA | USA | Posted: 1:26 AM on 10.23.08
->> To be precise, there's 2,662 possible frequency combinations (channels) with most 22 channel two way radios. Not 22,000; you're right.
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Jason Orth, Photographer, Photo Editor
Lincoln | NE | USA | Posted: 9:45 AM on 10.23.08
->> Robert, awesome!

Daniel, I'm with you man. I've got some 440 radios doing nothing right now as everything at my QTH is 2m. I could try using DTMF to trigger the setup as well.

As for legality - there are open bands on former VHF 'business band' frequencies, now called the MURS service - and you can transmit data. The radios there are relatively cheap, not FRS cheap, but not priced like a set of Motorola Radius radios.
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Stan Lim, Photographer
San Bernardino | CA | USA | Posted: 3:04 PM on 10.23.08
->> Hey Robert,

What about nextel's push to talk feature? If that works, then you can trigger the camera across the state. Now that would be fun to try!

Stan
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

Robert Benson, Photographer
San Diego | CA | USA | Posted: 3:40 PM on 10.23.08
->> That would work, though, although your phone bill might take a hit if you're constantly using it to trigger a camera.
 This post is:  Informative (0) | Funny (0) | Huh? (0) | Off Topic (0) | Inappropriate (0) |   Definitions

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Thread Title: 20 mile, 2,600 channel camera trigger
Thread Started By: Robert Benson
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