adwnis123
Full Member level 4
Hello, I have bought a device that has an input, that connects to telephone line. The output is the input of the telephone line. This device samples the input and when there is sound on the input over 0,5Vpp, it waits, and when the sound leaves, it waits for 5 seconds, then it closes and opens a relais module. After that it sends 1kHz PWM, with adjustable duty cycle from a pot, for 5 sec in the output (so the previous output, when there is PWM, vanishes for 5 seconds). After that the output connects to the input and continues to output the signal of the input. Where this device could be used for? Do you have any idea?