This board decodes DTMF signal either from an audio source or phone line to 4 bit binary TTL(5V) level output. It also indicates outputs with LED. Can use directly with microcontrollers to develop various DTMF related applications like remote monitoring, remote control, Caller ID, Auto Dialer.
Features
Decodes DTMF as 4 bit binary
TTL level output for direct connection to microcontrollers
Low power 5V DC operation
LED indication of outputs
Simple to use
Based on excellent HT9170 IC
Applications
Remote Control systems
Caller ID applications
FM receiver based remote control
Remote control using Mobile phone

This board decodes DTMF signal either from an audio source or phone line to 4 bit binary TTL(5V) level output. It also indicates outputs with LED. Can use directly with microcontrollers to develop various DTMF related applications like remote monitoring, remote control, Caller ID, Auto Dialer.
Features
Decodes DTMF as 4 bit binary
TTL level output for direct connection to microcontrollers
Low power 5V DC operation
LED indication of outputs
Simple to use
Based on excellent HT9170 IC
Applications
Remote Control systems
Caller ID applications
FM receiver based remote control
Remote control using Mobile phone