R
robot guy
- Jan 1, 1970
- 0
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.
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.