DTMF Decoder

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 relate applications like remote monitoring, remote control, Caller ID, Auto Dialler.

Specifications

• Decodes DTMF as 4 bit binary
• TTL level output for direct connection to microcontrollers
• Low power 5V DC operation
• Operating Current 100mA
• LED indication of outputs
• Based on excellent MT8870 IC
• PCB Dimensions (LxWxH in mm): 45.5×1.5×59.3mm
• Weight: 35g.

Applications

• Remote Control systems
• Caller ID applications
• FM receiver based remote control
• Remote control using Mobile phone.