Remote Video Transmitter
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Posts: 46,084
Anyone know how to get a remote video system and R/C
system to work together without interfering with each
other. I have a camera and Ramsey Electronic
transmitter mounted on a platform controlled by radio
control. As long as the video transmitter is off, the
R/C functions properlly. The instant the video
transmitter is turned on the R/C system functions as
if it has a mind of its own. Also I noticed that the
picture from the video is affected by the R/C system.
I read about a similar system in John Iovine's book
"Robots, Androids and Animatrons". Evidently it can be
done.
Brian
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system to work together without interfering with each
other. I have a camera and Ramsey Electronic
transmitter mounted on a platform controlled by radio
control. As long as the video transmitter is off, the
R/C functions properlly. The instant the video
transmitter is turned on the R/C system functions as
if it has a mind of its own. Also I noticed that the
picture from the video is affected by the R/C system.
I read about a similar system in John Iovine's book
"Robots, Androids and Animatrons". Evidently it can be
done.
Brian
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Comments
There is NO way. I've been that route. The only way I could solve the
problem was to program Stamp so it turned off the video when I wanted to R/C
and then turn it back on when I wanted to video. Worked for my robot may
wouldn't work for an airplace or boad where R/C commands are coninuous. The
video is the one really causeing the problem I think. It puts out more power
the your R/C Xmtr.
Sid - W4EKQ
>Anyone know how to get a remote video system and R/C
>system to work together without interfering with each
>other. I have a camera and Ramsey Electronic
>transmitter mounted on a platform controlled by radio
>control. As long as the video transmitter is off, the
>R/C functions properlly. The instant the video
>transmitter is turned on the R/C system functions as
>if it has a mind of its own. Also I noticed that the
>picture from the video is affected by the R/C system.
>I read about a similar system in John Iovine's book
>"Robots, Androids and Animatrons". Evidently it can be
>done.
>Brian
What frequencies are the two devices using and how far apart are the
antennas for video and R/C on the robot?
You can try separating the antennas a bit more and orienting them at right
angles to each other. The circuitry inside the robot for these two devices
should also be separated as much as possible.
You *might* get some improvement by slipping a small ferrite bead over the
antenna to the R/C receiver, assuming it is receiving a frequency *MUCH*
lower than the video transmitter is using.
Alternatives could involve turning off the video transmitter periodically
and if R/C signals are sensed during that off period, keep it off until R/C
signals cease being received. How workable that might be depends on how
dependent the robot is on the R/C controller and how much you like jumpy video.
Good luck,
Jim H
Robotics Competition website and the competitors are doing this kind of
thing. Check out http://avdil.gtri.gatech.edu/AUVS/IARCLaunchPoint.html for
links and info.
HTH
Justin.
Original Message
From: Jim Higgins [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=1H-Bth6CeyYr75MtYogo09ZciHrnaR1oPy04YgP5gRp4c-OCD_W8NGCKBdtCRY5SY_9Ypw71svYzEg]HigginsJ@s...[/url
Sent: 08 July 2001 00:19
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Remote Video Transmitter
At 18:44 07/07/01, Brian McMillion wrote:
>Anyone know how to get a remote video system and R/C
>system to work together without interfering with each
>other. I have a camera and Ramsey Electronic
>transmitter mounted on a platform controlled by radio
>control. As long as the video transmitter is off, the
>R/C functions properlly. The instant the video
>transmitter is turned on the R/C system functions as
>if it has a mind of its own. Also I noticed that the
>picture from the video is affected by the R/C system.
>I read about a similar system in John Iovine's book
>"Robots, Androids and Animatrons". Evidently it can be
>done.
>Brian
What frequencies are the two devices using and how far apart are the
antennas for video and R/C on the robot?
You can try separating the antennas a bit more and orienting them at right
angles to each other. The circuitry inside the robot for these two devices
should also be separated as much as possible.
You *might* get some improvement by slipping a small ferrite bead over the
antenna to the R/C receiver, assuming it is receiving a frequency *MUCH*
lower than the video transmitter is using.
Alternatives could involve turning off the video transmitter periodically
and if R/C signals are sensed during that off period, keep it off until R/C
signals cease being received. How workable that might be depends on how
dependent the robot is on the R/C controller and how much you like jumpy
video.
Good luck,
Jim H
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with other circuits and annoying the neighbors.
Shielding inside VCRs is made of Mu metal (difficult to find unless
you live in a large city). I have had good luck with metal from an
ordinary tin can though.
Cables also need to be shielded, even if they are short in length.
Avoid ground loops, I.E. try to make all grounds at or near the same
place.
Avoid power supplies with a floating ground.
I might add that you need to figure out if the interference is caused by the
RC handset, the RC receiver, video transmitter or video receiver. Could be
any number of strange things.
Even though the RC and video may be on different transmit and receive
frequencies, many RF circuits share common intermediate frequencies, which
can be susceptible to interference.
Original Message
> Video circuits need to be well shielded to prevent interference
> with other circuits and annoying the neighbors.
>
> Shielding inside VCRs is made of Mu metal (difficult to find unless
> you live in a large city). I have had good luck with metal from an
> ordinary tin can though.
>
> Cables also need to be shielded, even if they are short in length.
> Avoid ground loops, I.E. try to make all grounds at or near the same
> place.
>
> Avoid power supplies with a floating ground.
http://www.northcountryradio.com/rcfltr.htm
Shielding of the camera head may help too along with bypass caps.
> Anyone know how to get a remote video system and R/C
> system to work together without interfering with each
> other. ....................
> Brian
Mike DeMetz sect. Michiana R/C Choppers
miked@t...
http://sites.netscape.net/mdemetz
controller instead of an RF one, it wouldn't interfere as much.
[noparse][[/noparse]Non-text portions of this message have been removed]