You`ve got mail


Posted on Feb 7, 2013

The simple circuit in Figure 1 latches on an LED and an audio sounder when an appropriate new audible e-mail signal occurs. The method replaces the normal e-mail sound.wav file with a .wav file of any valid recorded dual-tone multifrequency (DTMF) sound. The circuit listens for the DTMF tone and latches on LED D1 and the piezoelectric buzzer, P1.



The circuit listens for the DTMF tone and latches on LED D1 and the piezoelectric buzzer, P1. R1 biases the microphone`s FET, and C1 couples the audio to the M-8870 DTMF-receiver, IC1 (Teltone Corp, www.teltone.com). IC1 integrates both bandsplit-fil




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Video title generator
Quartz Crystal Windup Wall Clock
60Hz pulse generator
OpAmp based Voltage Translator Ciruit for ADC of Micro-controller
PWM sound Tutorial
BA1404 FM Stereo modulator circuit design electronic project
UHF amplifier circuit
PLL FM Transmitter Circuit
Improved Anode Circuit Parasitic Suppression for Modern Tubes



Top