The following video shows a breadboarded Arduino automatically tuning a amateur radio's transmitting and receiving frequencies so as to allow two-way communications through a satellite. It also shows the accuracy of the doppler tuning while tracking a single satellite's tone through its pass: …

Amateur satellite tracking and tuning

system February 12, 2010, 9:58pm 3

i have no idea whats going on in the video :-[

what is the arduino doing? :-?