Yesterday, during OsmoDevCon 2018, Steve Markgraf released osmo-fl2k, a new Osmocom member project which enables the use of FL2000 USB-VGA adapters as ultra-low-cost SDR transmitters. How does it work? A major part of any VGA card has always been a rather fast DAC which generates the 8-bit analog values for (each) red, green and blue at the pixel clock. Given that fast DACs were very rare/expensiv