Hi,
I'm trying to open my Air Conditioner from phone so i thought of a very simple idea i'd put an old phone in a box ban all incoming calls but for my numbers then put an LDR above it when i call the phone lights up the LDR resistance gets to zero and with a voltage divider circuit and a BC845 transistor and a couple of 20k pots turn on a relay that turns on the btchino button of the Air Conditioner but the thing is there is that the circuit would close once i stop calling thus closing the Air Conditioner i want some sort of a one way trigger just like the TV button which i press and it opens the TV and instantly pop out any ideas?
Thanks
I'm trying to open my Air Conditioner from phone so i thought of a very simple idea i'd put an old phone in a box ban all incoming calls but for my numbers then put an LDR above it when i call the phone lights up the LDR resistance gets to zero and with a voltage divider circuit and a BC845 transistor and a couple of 20k pots turn on a relay that turns on the btchino button of the Air Conditioner but the thing is there is that the circuit would close once i stop calling thus closing the Air Conditioner i want some sort of a one way trigger just like the TV button which i press and it opens the TV and instantly pop out any ideas?
Thanks