News & Articles

PyroEDU
Get started learning to build your own electronics by following our FREE online courses below!
Learn More »

Categories

Sponsors

Build Like A Pyro!
Find many of the parts used on this site at our favorite online electronics shop
Take Me To The Gadgetory!
PhonePhreakrz: DTMF Decoder 2

Posted September 17, 2011 by Chris

“The DTMF decoder 2 is a useful tool used for decoding DTMF (Dual Tone Multi frequency) generated by telephones. The decoded digits are viewed on a 16×2 LCD screen. The DTMF decoder can be directly connected to a Serial port to view the digits in HyperTerminal on a computer.”

2 Responses to “PhonePhreakrz: DTMF Decoder 2”

  1. slink Says:

    I’ve tried looking for the MT8870DE at the site listed in the article and I also looked at Digi-Key, Jameco, Mouser, and Newark. Unless anyone can recommend another source it would appear that you can’t build this project due to a critical component being obsolete.

  2. Chris Says:

    Check here:
    http://www.zarlink.com/zarlink/hs/82_MT8870D.htm

Leave a Reply