U-Trak Arcade Trackball LED Illumination

U-Trak Arcade Trackball LED Illumination

If you have a Ultimarc U-Trak Arcade Trackball, then this mod is for you! Since my trackball is a translucent red, I chose to use clear bright 5MM LEDs to illuminate the trackball. If you have a clear or pearl ball, then maybe try 5mm RGB LEDs.

The included PCB DXF file will help you alight the holes, so that the LEDs align properly for maximum brightness. I used my CNC router to cut out the PCB. I first drilled two 1mm holes for alignment, then I secured the PCB to the sacrifice board to cut the perimeter.

The LEDs are wired in parallel for my application since I only had 5VDC as a voltage supply. This required a 22ohm 1/2 watt resitor to limit the current. I have provided links to a great LED/Resistor calculator to help determine the values for different voltages or if you choose to wire in series. You need to know the forward voltage and current of your LEDs to properly determine the resistor value.

PARTS

Universal Breadboard Single Sided Printed Circuit Board for Prototyping
Amazon

5mm Bright White LED Diode Lights (DC 3V 20mA), QTY 5
Amazon

Steel Thread Rolling Screw for Plastic, Black Oxide Finish, Pan Head, Star Drive, #4-20 Thread Size, 3/8" Length, QTY 2
Amazon

Hookup Wire

Misc. Spade connectors

REFERENCE

LED/Resistor Calculator

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