Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
sngupta said:how to convert the on-hook to off-hook automatically? i need to controll the circuit through telephone.
u need a ring detector ckt (like **broken link removed** ) , and count the nof rings (4017), after(2) rings enable a relay such that ur dtmf decoder(8870) is connected to the telephone line .sngupta said:i need to control the circuit i.e when i call a telephone no. it will rings then if it goes to off-hook after two rings then i will press the no.1 button in the telephone, that will receive at receiver side by using the DTMF receiver then based on the output i will switch the light or fan using relay