5V power on 90Q?

[Marc Swanson]

> Quick question,
>
> Does EVERYTHING run at 12V on the 89 90q...or would there be
> something that
> runs at either 5V, 7V, or 8.5V??
>
> I'd like to directly power a laptop inside my car...without the
> need to buy a
> power inverter.


Off hand the only thing that comes to mind is the ISV which runs at 9v.. I'm
sure there are other things as well but be carefull:  You need to make sure
that you have enough current to supply the laptop.  Not to mention that
sensitive electronics like laptops don't like large fluctuations in
voltage/current which are quite common in most of the cars electrics.  If
you really don't want to buy an inverter you could just build an appropriate
voltage divider to bring the voltage down a bit from 12v plus a capacitor or
two to handle swings in power supply (and sizing the resistors/capacitors
right can be tricky as load changes as things are turned on/off).  By the
time you've gone through all of this work you've just built yourself the
equivalent of an off the shelf regulated power supply minus the conversion
from 120v AC :-)


-Marc-


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+Marc Swanson                          +
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