On Sun, 11 Apr 2004 11:08:10 +0200, Gary Anderson (G) <andersg@...> wrote:
Hi All..
Any ideas on being able to change the remote control units we use to
open the garage door to be able to conver/use this circuit to TX and
RX a PCs COMS ports signal??
Thanks Stephan.. The web site you supplied has given to the capacity
to convert parallel to serial signal. Now I need to TX this over a
distance of about 50m or more.
Any thoughts and ideas???
Thanks
Gary
Get a old CB (ham) radio, like the handheld units or the ones for car.
you can find them for next to nothing at ebay. there should be channels for
data communication. there are also already modems available, and i am sure circuits
for making them. it would be the easy solution.
I could get such wireless modules here like described in the elektor, where you just
connect rx and tx an that's it.
It would be the better solution, because you are not using CB frequency (not sure if this is legal)
and you have a much smaller unit, less power consumption etc.
I haven't followed the whole converstion, can't you get these modules anywhere?
i would reckon ther must be vendors shiping to .za.
(you could try the german supplyers like reichelt or segor, ot the austrian RS components
if you really have none locally. of course you can also try american like digikey which will
be cheaper.
I strongly oppose any wireless transmission if there is a posibility to run a wire.
especially if both rx and tx are stationary it is simply stupid to use up frequencys.
I dunno why you can't run a wire, but i would think twice.
st
