Amateur Radio Projects


Posted on Feb 4, 2014

It took sometime to develop this interface for Echolink. It uses PIC16F84A and accepts external DTMF from Radio. My Latest Version Foxecho-k7 provides total isolation between Rig And PC and has AGC on received audio. Delay on this project was in part of Wrong DTMF chip that I selected a year back, which did not match the PIC well. Now this interface uses MT8870 and its one of the best sounded


Amateur Radio Projects
Click here to download the full size of the above Circuit.

echolink interface available to amateur radio operators. The best of all is, you do not have to buy this paying high price but you can make it yourself at home. Full documentation & firmware are posted here.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Latch Switch
Mini Class A Audio Amplifier
12V 10Amp MJ2955 Switching Power Supply
fsk demodulator circuit using lm565
cdmp3 cd with cdroom circuit diagram
The battery voltage is low frequency amplifying circuit diagram 1v
LED display control circuit diagram of a counter
Sawtooth generator circuit II



Top