3 ms·

In my 1972 Ford Maverick, I could turn on the headlights and the lighting in the interior console would adjust accordingly.

• tyingq 8y ago
  My 80's boombox did this in a pretty binary way. Plugging in the AC adapter mechanically lifted the contact to the batteries. Still a detection followed by a current draw adjustment.
  • judge2020 8y ago
    Watch out, Qualcomm is going after you next.
    • deleted 8y ago
      [deleted]