Question

[Richard J Lebens]

I don't know.

a) What is the failure rate of the bulb at 13.6 volts?
b) What is the failure rate of the bulb at 12 volts?
c) What is the failure rate of the regulator?
d) What is the cost of the regulator?
e) What is the cost of the bulb?

Is (B + C) * (D + E)    <    A * E   ???

How about an led?

--- Todd Young <auditodd at attbi.com> wrote:
> I thought of something last night and wanted to throw it out to the
> list
> for feedback.
>
> We all know that normal voltage to the headlights drops as you turn
> on
> accessories, thereby reducing the available light output from your
> headlights. Some of us have wired in relays to direct voltage
> directly
> from the battery to the headlights, thereby shortening the expected
> life
> of the bulb because it is receiving 13.6 volts rather than 12 volts.
>
> Here's my idea, instead of using relays, why not utilize a DC-DC
> converter circuit with the relays? Input would still be 13.6 volts
> directly from the battery, but with the DC-DC converter, the voltage
> from the battery could be a "range" of voltages, but still have an
> output from the converter set to a steady 12 volts.
>
> OK, tell me why this wouldn't work? And if it would work, any
> electrical
> engineers out there that could throw together a circuit for us?
> --
> Todd Young
> 7079 Dawn Ave. E.
> Inver Grove Heights, MN 55076
> 651-450-7725
>


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