PC Case mod issue (illuminated switch)

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SUMMARY

The discussion focuses on modifying a PC case by adding an illuminated switch to control a cathode light kit. The user successfully spliced the wires and soldered the switch but encountered a voltage drop issue affecting the inverter's performance. The cathode tubes require 12V input to function correctly, converting it to 680V, while the current draw is 5mA. The user seeks solutions to increase voltage or determine if replacing the illuminated switch with a non-illuminated one is necessary due to potential incorrect wiring.

PREREQUISITES
  • Understanding of basic electronics, including voltage and current concepts.
  • Familiarity with soldering techniques for electrical connections.
  • Knowledge of illuminated switch wiring, specifically the three connections: Supply, Switched Output, and Lamp.
  • Experience with cathode light kits and their voltage requirements.
NEXT STEPS
  • Research methods to increase voltage for LED applications, such as using a DC-DC boost converter.
  • Learn about proper wiring techniques for illuminated switches to avoid voltage drop issues.
  • Explore alternatives to illuminated switches that maintain functionality without voltage loss.
  • Investigate the specifications and ratings of cathode light kits to ensure compatibility with modifications.
USEFUL FOR

PC modders, electronics hobbyists, and anyone interested in customizing PC lighting solutions will benefit from this discussion.

Kevin2341
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Hey all,

I bought a cathode light kit for my PC case a couple days ago and decided I wanted to mod it so that I could have a switch on the front of my pc to easily turn it on and off.

Today I spliced the wire and threw a switch on and soldered it up. I've tested the switch and it works. However, I think there is too much of a voltage drop across the LED within the switch.

The cathode tubes are rated for 12v into an inverter which turns 12v into 680v. The current draw is 5mA (the tubes themselves are 300mm long [11.8inches]).

Is there any way I can increase the voltage to get enough to the inverter? I thought about splicing it into a parallel connection, but that would drop my amps.

Any ideas? Or do I need to replace my illuminated switch with a non-illuminated?
 
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The switch is probably wired incorrectly. Illuminated switches typically have three connections:
  • Supply
  • Switched Output
  • Lamp
With the second wire from the lamp internally connected to Output.
Get them sorted and it will likely work.
 

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