DTMF Encoder Decoder is very easy to use the program to decode DTMF dial tones found on telephone lines with touch-tone phones. • DTMF is the global standard for audible tones that represent the ...

I originally developed this 8 bit AVR-based DTMF decoding code in 2009 for a special one-off project ... Permission is hereby granted, free of charge, to any person obtaining a copy of this software ...

[Brad] over at LucidScience decided that it would be useful to have a DTMF decoder on hand, and got busy building one. His DTMF decoder box uses a CM8870 DTMF decoder chip, which you might assume ...

The device consists of a DTMF decoder attached to the headphone jack of a cheap handy talkie. When a DTMF tone is received, a NodeMCU connected to the decoder calls an IFTTT job to echo the key to ...