An HTML Browser Page that Uses Display Pixel Clock EMI Leakage to Transmit VHF Morse Code

Thank you to Efe (TA1EEI) for writing in and sharing an HTML web tool he created that uses a PC monitor to transmit Morse code. The tool works by modulating the monitor's pixel clocks to intentionally generate EMI leakage in the form of a Morse code signal. It transmits at 148.5 MHz.

Efe's work appears to be a much simpler version of TrojPix, a University research project that we posted about back in July. TrojPix is a more advanced system that introduces imperceptible pixel modulations into the screen, making high-bandwidth wireless data transfer possible via monitor EMI leakage.

The GitHub project page for Efe's VHF Monitor RF Transmitter explains exactly how the project works, including the video pixel clock and how it can be modulated and transmitted wirelessly. Efe has also provided a link to a Reddit post where there is a video, and discussion.