Subject:
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Re: Mindstorms SnooperBot
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Newsgroups:
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lugnet.build
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Date:
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Wed, 7 Oct 1998 15:05:28 GMT
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Reply-To:
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rocketman@=spamcake=SHIELDfamilyradio.com
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Viewed:
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873 times
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Be careful of the power output. Assuming you're here in the US, and depending
upon the band, the FCC will only let you put out up to 100mW on domestic
frequencies. Citizens' band is 4W. Just about everything else requires a
license.
I'm assuming it's not a very big tx you've built, but I thought I should say
something. Maybe you knew this, and maybe my facts are in need of adjustment,
but be careful, and make sure you're not causing interference intentional or
otherwise to any of your neighbors. The FCC really doesn't like "homemade" stuff
that puts out a dirty signal. Filter out all unwanted harmonics.
DJA wrote:
>
> I plan to build a bot that will be able to snoop around into a room
> (hopefully with people talking about secret things!!!! :-) ), and have it
> transmit the conversation via a micro FM transmitter. The one prolem is
> that the bot itself will be quite obvious as well as a conversation piece.
> This means that the lilkely conversation will be about the bot. That's ok,
> I never did intend to be able to catch any top secret conversation anyway.
>
> I am in process of building the bot. I have already built the FM micro
> transmitter. I plan to post the schematics , part list and some scans for
> the FM transmitter once I get them scanned. I will also post info/pics on
> the bot once it is built. Check my website in a week or so.
>
> --
> Visit my site at:
> http://www.globalserve.net/~dastolfo
> Technic and Mindstorms
>
> Remove NOSPAM to reply via email
>
> --
> Visit my site at:
> http://www.globalserve.net/~dastolfo
> Technic and Mindstorms
>
> Remove NOSPAM to reply via email
--
From Tom McDonald
Anti-spam block in place.
http://mbr-hobby.neotown.com/radiotitan/lego/lego.html
radiotitan@yahoo.com
--
Do what you can, but behave yourself.
We'll have more, right after this.
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Message has 2 Replies:
 | | Re: Mindstorms SnooperBot
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| Thanks for the info. I am here in Canada. I am somewhat ignorant of frequency limits by CRTC (Canadian equivalent of the FCC). The unit can be tuned to braodcast in short range to the lower FM frequencies near 80-90 Mhz. Tom McDonald wrote in (...) (26 years ago, 7-Oct-98, to lugnet.build)
| | | Re: Mindstorms SnooperBot
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| Hey! go easy on the guy, the FM transmitter can't be all that big, and probably can't go any further that 20 meters. For DJA: Usually they transmit arou 87.0-88.9, FM radio stations only go to 89.0 as low as possible, so just tuning the radio to the (...) (26 years ago, 18-Oct-98, to lugnet.build)
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Message is in Reply To:
| | Mindstorms SnooperBot
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| I plan to build a bot that will be able to snoop around into a room (hopefully with people talking about secret things!!!! :-) ), and have it transmit the conversation via a micro FM transmitter. The one prolem is that the bot itself will be quite (...) (26 years ago, 7-Oct-98, to lugnet.build)
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