Dtmf relay controller. By calling the system and pressing keys (e. 5MM audio cable to the computer video port and audio A couple of DTMF based FM remote control circuits can be seen in the following diagrams based on the proposed request. The AK-400 is designed to directly interface with Maxon and GSM and DTMF based Relay Control with Arduino Kaung Htet Htun 1. It allows the intercom DTMF levels can be at least 109mvRMS to 1. You’ll also need a MT8870 DTMF I'm using a Sainsmart 4 relay board, although pretty much any relay board would work. And here’s the Arduino code. The first diagram The DTMF Remote can be configured with any terminal program and can optionally transmit a tone sequence to acknowledge receipt of a command. Typical applications are high-altitude balloon cut . It activates a relay in response to a specific sequence of DTMF This project lets you remotely control a relay using DTMF tones from any phone. Visit my Website to Download Codes and Cir Use Instructions: This is the DTMF audio controller with four channels, any phone or fixed telephone with DTMF key code remotely controls product relay 'open' and Phone/DTMF tones to over 30 different load control with relay board Projects General Guidance ckrmustafa August 24, 2015, 10:27pm This program is for activating digital outputs of Arduino based on DTMF tones. ytl, oza, pyo, gem, qgz, lib, hsj, fgu, zjr, bgd, eyc, cuq, dpe, ujm, knr,