Search results for: 'code module arduino'

MT8870 DTMF Decoder Module Features DTMF stands for Dual-tone-multi-frequency. This module is for sending signals using the voice-frequency band over telephone lines to switching centers. This module has two important applications: First, to specify the desired number to telecommunication through switching centers; second, it is capable of transmitting commands to these centers and other telecommunication devices. Technical specifications: Input voltage: 5V 5mm input jack LED to indicate the binary ...