About the article

PC-controlled DTMF decoder

PC-controlled DTMF decoder
Most of you will be aware that DTMFtelephone dialling signals are two-tone combination that may be recorded on any cheap tape recorder, just like speech, Playing back these tone pairs into a suitable decoder should reproduce the digit originally pressed on the telephone. The use of a pe as a visualization terminal allows the electronics you need to implement a DTMF decoder to be reduced to its most elementary form.
Downloading of this magazine article is reserved for Elektor Members only.
Already a member? click here to log in.
Loading comments...