> -----Original Message-----
> From: Gennette, Bruce [SMTP:bruce.gennette@TAFE.NSW.EDU.AU]
> Sent: Monday, February 05, 2001 6:16 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [EE]: +12V and +5V in automoble
>
> This problem will get *MUCH* worse real soon when the next generation of
> cars goes to 42V (nominal 36V) batteries.
>
> This move is to reduce the amps carried by the copper cable to reduce the
> mass of the copper to allow the mass:engine power ratio to be increased a
> little.  Oh, and it also improves the efficiency of the many small
> electric
> motors in modern cars.
>
> I'm sure some of the companies are already working on a single chip
> solution
> to derive 3, 5, 12 & 24V from the 36V to power uC and legacy devices.
>
> Bye.
>
I can see a whole new crop of problems appearing in the near future.  New
batteries will be extrememly expensive, and I suspect more fragile and open
to abuse form poor charging practices than current items.  Also what happens
when some helpfull person in a 42 volt car tries to give some poor soul with
a (12v) flat battery a jump start? Bang!

Oh well, the price of progress I guess.

Mike

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