.: led gauge lighting |
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Enhancing the gauge lighting with
3-element LEDs - Red, Green, Blue.
Varying the intensity of the three
colors allows for a near limitless color
pallet.
On the
left is the original bulb, and on the
right is the new RGB LED. |
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In order to use the original gauge
sockets, a 3/8" id
bushing was used as a mold that allowed for
a snug fit of the led, and at the
correct height above the socket (the
same height as the center of the old
bulb). |
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The original bulb used
the metal housing as ground - I need to
run three wires for each LED, so a 4th
wire for ground (common) is no big deal.
Plus, using an isolated common
makes it easy to change the overall
intensity - aka. dimming the dash
lights. |
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In order to convert all the
dash and courtesy lights to LEDs,
several transistors were used. The Turn
Signals and Bright- lights use NPN
transistor because they are turned by
supplying power.
The Brake Light uses an PNP transistor
because the parking brake and brake
proportioning valve supply ground. |
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The PCB board size is 4"x5".
There are extra connectors for expanding
the courtesy lights. The color of all
the LEDs are controlled by changing the resistance of each color with a
seperate potentiometer. |
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