HT9170B DTMF Receiver

used products:

1. 100nf
2. 22pf
3. CM8870PI
4. HT9170B

content:

Çeşme: http://www.electronicshub.org/dtmf-mobile-controlled-robot-without-microcontroller/ http://www.mediacollege.com/audio/tone/dtmf.html https://scratch.mit.edu/projects/254080/