What receiver are you using to detect the ring from your cell phone?
if you use uController, you just simply use one transistor of the buzzer or vibra cell phone
What receiver are you using to detect the ring from your cell phone?
if you use uController, you just simply use one transistor of the buzzer or vibra cell phone
I ever made a phone interface project using CDMA or GSM cellphone, which I normally use Nokia, Kyocera, Ericsson, .. when a incoming buzzer issued a logic low output with the ring volume requirements should be maximal
As you know the data send in some packets and this circuit detect the energy of these packets.while ringing and speaking to cell phone you see the output of that circuit always blink.and not detect only the ring signal
There's no easily detectable ring signal in GSM communication. The shown circuit can be considered as "RF activity" indicator. It will trigger when the phone acknowledges incoming calls, but also on housekeeping data exchange with GSM base station, sending/receiving SMS and other activities. No chance to detect calls selectively.