I know this is really an answer, but I think a lot of what we take for
granted today was just decided by someone in the past, and then adopted
by others to maintain interoperability. I don't actually know why the
originals were chosen, but I know that if I want the equipment I design
to talk to the majority of the equipment out there, I better use the
same values it uses.

Just a thought.

Josh
joshy@mb.sympatico.ca

Michael Cook wrote:
>
> Hi guys. Just a few interesting questions for you here. Hopefully some
> of you could tell me the answers!
>
> 1. Why are wall sockets (in the USA at least) 120 volts? Why not 12? Or
> 150?
> 2. Why are most batteries 1.5 volts? Why not 1? Most chips I use need
> 5v, so why not 5? Or 2.5?
> 3. Why do computers use 12v and 5v instead of 15v and 5v, or some other
> combination.
>
> Just some questions to ponder, thx.
>
> -Michael Cook
>
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