The mother of all guides!
So, here we go.
You need 3 of these...
The goal is this.
Take your Dremel with the cutting disc.
You can also use this but it removes more plastic so you might have a problem later when you put them back together. I didn't
Here you see aproximetely where you need to cut.
Mask the area arround the gauge to give you a guide line.
I hope your hands don't shake.....
Undo the small nut on the back to be able to remove the guage from the case.
Now, this is I think the most difficult part of the whole project.
I used to small screwdrivers as you can see and very gently pulled the needle off. I doublechecked that I didn't cause any damage to the gauge before continuing by putting the needle back and checking if its moving smooth.
Time to design the white faces. I used Coreldraw 12 to do mine since I found it very easy to use.
After a few hours....
This is the exact size of the gauges. Print it and they fit straight away.
Trial test of the oil pressure gauge
Now, on to put the LEDs in.
I used a hot glue gun to glue the 2 LEDs inside the plastic housing of the gauge
The LEDs. 5mm Ultra Bright Blue.
There is a reason they are bent. You will understand in the next picture.
After you glue both of them, route all 4 wires from the hole in the back of the case.
I used a 470ohm resistor to wire all of the leds in parallel. Since I was doing it in my house using a power supply rated at 2 amps, I noticed that everytime I connected one more LED, the rest lost some of their brightness. That is probably because of the power supply but it can also be because I am using one single resistor for 6 leds. Since I am out of resistances I can not test how it will look with one resistance to each led. Maybe somebody else has something to say on that.
I hope this guide will give you some ideas and probably do some of the things I did different and better. If you have any hints please post them and I will edit my guide to make everybody's life easier!
PS. some VDO gauges ready to go under the knife
Modified by Black_cabbie at 11:29 AM 7-25-2005