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Daily Archives: December 6, 2016
December 06, 2016 at 06:49PM
Alternate view #day6 #hotwheels via Instagram http://bit.ly/2gPPbR2
December 06, 2016 at 06:46PM
#day6 #hotwheels #adventcalendar a new car, not sure about the side pattern. via Instagram http://bit.ly/2g7k9oM
Rtl-sdr and raspberry pi amateur radio repeater
http://hackaday.com/2016/12/05/an-amateur-radio-repeater-using-an-rtl-sdr-and-a-raspberry-pi/
An amateur radio repeater used to be a complex assemblage of equipment that would easily fill a 19″ rack. There would be a receiver and a separate transmitter, usually repurposed from commercial units, a home-made logic unit with a microprocessor to keep an eye on everything, and a hefty set of filters to stop the transmitter output swamping the receiver. Then there would have been an array of power supply units to provide continued working during power outages, probably with an associated bank of lead-acid cells.