DTMF Decoding with MT8870

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=v6ShKMz4nJc

In this iteration of the phone line simulator project, now that the ESP8266 can generate call progress tones, I added a PCF8574 GPIO expander and a KS0835F subscriber line interface circuit. • Now I can connect a land line phone and make it ring, or pick it up off hook, detect that state, and play a dial tone. • Things are starting to take shape toward the goal of a central office simulator. • Sketch: https://github.com/GadgetReboot/misc_... • DTMF Decoder project: https://github.com/GadgetReboot/DTMF_... • KS0835F phone line module: https://github.com/GadgetReboot/KS083... • MT8870 datasheet: https://www.microsemi.com/document-po... • If you'd like to support the channel, you can: • Support me on Patreon: / gadgetreboot • Shop through my affiliate links! • Banggood https://www.banggood.com/custlink/3vK... • Aliexpress https://s.click.aliexpress.com/e/_AFeHwB • Amazon.com https://www.amazon.com/? _encoding=UT... • Amazon.ca https://www.amazon.ca/? _encoding=UTF...

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