Details

This board can generate DTMF tones as per input from microcontroller. The output is DTMF audio which can be fed to variety of sources like Landline Telephone, FM transmitter, Mobile Phones or custom devices which needs DTMF transmission. At receiver side the DTMF can be decoded using popular MT8870 board or any such devise.

Features 

• Full 16 DTMF tones generated 
• Digitally controlled
• Simple to use and Low Cost 
• Onboard LM386 based amplifier 
• Adjustable 1W DTMF audio output 
• Can drive speaker directly