aspedon
Newbie level 4
![Newbie level 4](/styles/images/ranks/blevel1.gif)
i'm a student, want to create circuit for monitoring phone "ON HOOK" activity, when user on hook (call end) then circuit generate dtmf "D" tone at my audio amplifier.
any there some simple circuit (without) microcontroler? please...please... ;-)
thank's
any there some simple circuit (without) microcontroler? please...please... ;-)
thank's