Re: Amusing problem about DC polarity




"siliconmike" <siliconmike@xxxxxxxxx> wrote in message
news:1149838180.937755.216870@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Imagine a black plastic box that takes in DC power but has no polarity
markings on its power socket.

The problem is to experimentally determine the correct DC polarity
without opening the box and without letting the box die.

How close can we come?


I think it was amusing when we came out of the Fat Cat after a fair few
pints of Old Roger and Gary fell into the, more than deep, hole the road
diggers had probably dug in the wrong place and we left him there.

DNA



Obviously we went back and dragged him out.


.



Relevant Pages

  • Re: Amusing problem about DC polarity
    ... markings on its power socket. ... The problem is to experimentally determine the correct DC polarity ... without opening the box and without letting the box die. ...
    (sci.electronics.design)
  • Re: Amusing problem about DC polarity
    ... The problem is to experimentally determine the correct DC polarity ... without opening the box and without letting the box die. ...
    (sci.electronics.design)
  • Re: Amusing problem about DC polarity
    ... The problem is to experimentally determine the correct DC polarity ... without opening the box and without letting the box die. ...
    (sci.electronics.design)
  • Re: Amusing problem about DC polarity
    ... The problem is to experimentally determine the correct DC polarity ... without opening the box and without letting the box die. ... (assumes no humongous input capacitors; ...
    (sci.electronics.design)
  • Re: Amusing problem about DC polarity
    ... The problem is to experimentally determine the correct DC polarity ... without opening the box and without letting the box die. ...
    (sci.electronics.design)