Get Your Monitor Transmitting VHF With A Browser Tool

A browser-based tool built by developer Efe exploits pixel clock timing on monitor connections (HDMI/DisplayPort) to generate spurious VHF transmissions, effectively turning a computer monitor into a crude radio transmitter capable of sending Morse code. The technique relies on multiplying horizontal resolution, vertical resolution, and refresh rate (accounting for blanking intervals) to calculate the resulting frequency—for example, 1080p at 60Hz produces a signal at 148.500 MHz. The tool is available to test directly in a browser, though transmitting on unlicensed VHF bands is technically against regulations even at this weak signal strength.

Source: https://hackaday.com/2026/08/30/get-your-monitor-transmitting-vhf-with-a-browser-tool. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.