RF Project

Archiver

I'm building a product to market that will use a simple Transmitter
and
Reciever like the Ming TX-99 & RE-99. The transmitter and reciever
will
only be as far as 5ft from each other.

My delima is how will be able to ensure that one system does not
interfere with another. (since each product will be operating @ the
same frequency)[noparse][[/noparse]This is assuming two vehicles are equipped with my
product and have both vehicles are parked next to each other] Is my
only option convert to a codehopping transmitter and reciever?

Trying to keep it cost effective, most kits on many of the hobby
sites
are rather costly and I will have no use for the enclosures they come
with.

Does your company build projects in large quanities for a finished
product?

ragrgsby@m...

Archiver

check out Laipac transceiver modules. small, inexpensive , and Ideal for
connecting to a BS1. I'm using the 8 chan TRF-2.4 Ghz with an wireless home
alarm system. with a distance of a few hundred feet it works great for me.
http://www.laipac.com/easy_eng.htm

each channel is 1 mhz apart to keep from interfering with each other. If
they really got to be on the exactly the same frequency. you could always
simply use an assigned address scheme. Kinda along the I2C protocol scheme.
This way you could still have a lost cost transceiver and fairly simple
programming.





At 11:13 PM 5/15/2004, you wrote:
>I'm building a product to market that will use a simple Transmitter
>and
>Reciever like the Ming TX-99 & RE-99. The transmitter and reciever
>will
>only be as far as 5ft from each other.
>
>My delima is how will be able to ensure that one system does not
>interfere with another. (since each product will be operating @ the
>same frequency)[noparse][[/noparse]This is assuming two vehicles are equipped with my
>product and have both vehicles are parked next to each other] Is my
>only option convert to a codehopping transmitter and reciever?
>
>Trying to keep it cost effective, most kits on many of the hobby
>sites
>are rather costly and I will have no use for the enclosures they come
>with.
>
>Does your company build projects in large quanities for a finished
>product?
>
>ragrgsby@m...
>
>
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>Yahoo! Groups Links
>
>
>
>

Archiver

also Holtek Semi conductors makes a very low-cost encoder / decoder chip
pair that has a billion different addresses using the same frequency. the
chip is called HT-12D / HT-12E. Hunter Fans uses them in their remote
controls.

www.holtek.com.tw/docum/consumer/2_12e.htm


At 11:13 PM 5/15/2004, you wrote:
>I'm building a product to market that will use a simple Transmitter
>and
>Reciever like the Ming TX-99 & RE-99. The transmitter and reciever
>will
>only be as far as 5ft from each other.
>
>My delima is how will be able to ensure that one system does not
>interfere with another. (since each product will be operating @ the
>same frequency)[noparse][[/noparse]This is assuming two vehicles are equipped with my
>product and have both vehicles are parked next to each other] Is my
>only option convert to a codehopping transmitter and reciever?
>
>Trying to keep it cost effective, most kits on many of the hobby
>sites
>are rather costly and I will have no use for the enclosures they come
>with.
>
>Does your company build projects in large quanities for a finished
>product?
>
>ragrgsby@m...
>
>
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>Yahoo! Groups Links
>
>
>
>


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