Teletext for Raspberry Pi This software generates a teletext signal in software. No hardware mods are needed. THIS WILL ONLY WORK ON A PAL TV! UPDATE: This demo will also crash modern LCD TV's teletext decoder. It's because the demo sends the same packet over and over and new TVs can't handle it... Usage: Have a Raspberry Pi connected to a TV by composite video in PAL mode. Build the programs: make Twiddle the registers: sudo ./tvctl 0 -16 0 16 Run the demo: ./teletext Press the text button on your TV remote.