From: ldo@nz.invalid   
      
   On 1 Jan 2026 04:29:06 GMT, Robert Riches wrote:   
      
   > I have seen embedded devices where an an LED was intentionally   
   > toggled every so often if everything was working properly.  If   
   > the RTOS or something connected to it were to hang, the LED would   
   > get stuck either off or on.   
      
   I can think of a better design: a light that is powered by the   
   discharge of a capacitor, that needs to be recharged by a controller   
   signal a few times a second, to keep it lit steadily. So if the   
   controller ever fails, the light will go out.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)