Hi,
A project that I have been working on is to create a switch controlled by the telephone that I can use to turn on my computer remotely. Right now it is pretty basic, the circuit that I am using allows the parallax basic stamp to count the number of rings of the telephone (just as if I was pressing a button. The basic stamp is hooked up to the relay switch in the circuit). If I hang up after the fourth ring of the phone my computer will be turned on by the basic stamp.
The circuit I am currently using is similar to the one below (except the constant voltage is about 6 volts instead of 12 because the input from the phone is only about 12 volts):
The project is working now, but it creates a lot of background static on the home phone line. Does anyone know why it might be creating this noise? I have played around with bridge rectifiers and when connected to the input from the phone it seems to help cut down on the static a bit.
I am also open to other ideas on how to turn on my computer remotely that people have heard of.
Thanks in advance for any help!
-Eschatt
A project that I have been working on is to create a switch controlled by the telephone that I can use to turn on my computer remotely. Right now it is pretty basic, the circuit that I am using allows the parallax basic stamp to count the number of rings of the telephone (just as if I was pressing a button. The basic stamp is hooked up to the relay switch in the circuit). If I hang up after the fourth ring of the phone my computer will be turned on by the basic stamp.
The circuit I am currently using is similar to the one below (except the constant voltage is about 6 volts instead of 12 because the input from the phone is only about 12 volts):
The project is working now, but it creates a lot of background static on the home phone line. Does anyone know why it might be creating this noise? I have played around with bridge rectifiers and when connected to the input from the phone it seems to help cut down on the static a bit.
I am also open to other ideas on how to turn on my computer remotely that people have heard of.
Thanks in advance for any help!
-Eschatt