Re: one channel radio frequency help

On Tue, 03 Apr 2007 06:49:15 -0700, robot guy wrote:

I could use some input on this subject. A while ago I used infared
led's hooked up to a 555 to flash at a certain speed, I can't remember
what speed it was but I then had some special little divice that when
it saw an infared flashing at one specific givin speed it would either
close a switch completing the circuit, I can't quite remember how I
wired it but any way I'd like to do the same with a radio. What I want
it to do is turn on and led first than move on to turning on ovens,
unlocking cars etc...
I have a good idea how to do it, just take a transmiter and pulse it
at a certain speed with a 555 but how do I get my reciever to only
regonize that certain speed, a filter, a tone detector? I could really
use some input or websites to look at.

Make it up from scratch again, just like you did the first time, as you
seem to indicate[1]; and this time, if you're too drunk or zoned to
remember, take notes. For that matter, take notes anyway.

And always remember the first tenet of "State-Dependent Learning":
"If you can't learn it while you're high, you can't learn it."

And, just because I'm feeling frisky at this moment in spacetime, I
feel like ripping off one of Uncle Jimbo's lines: "Kids, there's a
time and a place for everything, and that's College!"

Have Fun!
Rich
[1]: "A while ago I used infared led's hooked up to a 555 to flash at a
certain speed ..."
[1A]: "I can't quite remember how I wired it..."

.

Relevant Pages

  • Re: one channel radio frequency help
    ... led's hooked up to a 555 to flash at a certain speed, ... what speed it was but I then had some special little divice that when ... unlocking cars etc... ... very short code pulse about once a second and then going back to ...
    (sci.electronics.design)
  • Re: one channel radio frequency help
    ... On Apr 3, 12:48 pm, "Rich Grise, Plainclothes Hippie" ... led's hooked up to a 555 to flash at a certain speed, ... it saw an infared flashing at one specific givin speed it would either ... it to do is turn on and led first than move on to turning on ovens, ...
    (sci.electronics.design)