Paul Hansel

Tag: rf

  • Beating the heat with an electric heart

    —

    by

    paul
    in

    Back in the days before computerization, cars used to use thermal oscillators to make their lights flash. This Ideal Heavy Duty Flasher 537 (12V) is one such oscillator. Although it might be called a flasher relay, it differs from its cousin, the electromagnetic relay. They come in a metal can and hardly weigh anything –…

  • Popping the tire pressure monitoring relearn tool bubble

    —

    by

    paul
    in

    [2026-03-01]: Ever thought about how these could be used for surveillance? These guys did! https://www.darkreading.com/ics-ot-security/tire-pressure-sensors-silent-tracking [2024-07-06: Updated to include simulation results and more scope traces.] If you own a car, you’ve no doubt encountered this mystery at least once. The tire pressure monitoring system tells you your flat tire is on the driver’s side front,…