I started mucking around with lighting for my translucent trackball this evening. Actually, last night, it’s ticked over midnight nearly two hours ago. A christmas decoration with about 1000 red green and yellow lights carked it. I figured the lights would come in handy.

So tonight I rigged up a spare power supply, using the shorting technique* to get power of the rails without being plugged into a PC, and figured I would need only one of the little christmas lights to light my track ball from beneath.

I attempted to take some photos of the back-lit trackball – it was really quite hard…

Photo 1: Totally dark room. Flash went off. Can see everything except for how well the trackball is lit.

Photo 2: Totally dark room. I set the camera to suppress the flash. Can’t see anything but the trackball. At least you know it’s there…

Photo 3: Nearly dark room. I turned on a small flashlight in the corner. I also enabled the camera’s “moon vision” function. I am not a photographer by any stretch of the imagination so I am guessing it forces the lens/iris bit to be wide open. It’s also blurry because it was a three second affair. have you ever tried to hold a camera steady for three seconds? It’s hard.

With the three pictures you can see that the trackball throws out a fair bit of light.

*Shorting technique for PSU’s: older 20-pin ATX PSU’s can be coaxed to turn on by shorting the green and black wires (pins 4 and 5) of the motherboard power connector. Once plugged into your standard 240 volts the fans will spin up and you will get power thru the 12V and 5V rails, without the need to have you PSU connected to a PC. Very handy for testing basic DC electronics, or checking your individual PC components.

Categories: MAME

1 Comment

Reckless · February 4, 2007 at 10:33 pm

Good to see you’re making some progress! The translucent trackball looks cool.

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