Question

[Robert Myers]

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You would definitely need to allow for the current loading of the bulbs.  A
single 130 watt high beam bulb would draw something on the order of 10
amps.  Two would require ~20 amps - just for the high beams on my car
alone.  Now add in current for low beams (another 10 amps or so) and fog
lights (yet another 10 amps or so) and...

Anyway, you get up into fairly heavy current loads pretty quickly which
would, in turn, require a pretty hefty DC/DC converter.  Relays are a most
likely a whole lot less expensive.

At 04:18 PM 4/5/2003 -0600, Todd Young 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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I've been wondering...  Who would Jesus bomb?

Bob
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  Robert L. Myers  304-574-2372
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