This PC case lighting mod's for those who find CCFLs too harsh and CCFL sound activated modules marginally effective. I need to tidy up some wires, but the point of this video is the lighting, not the case wiring, so.... Mods: Hardware-hacked 140mm Enermax TB Apollish rear fan. Power to the LED array has been separated from the power to the fan. Its LED array is driven by a sound reactive TIP31-based NPN transistor circuit tied to the left audio channel. Edge lit cast acrylic motherboard underlay. Provides the glow under the momma and is sound activated using the second (right) audio channel and a separate TIP31 circuit. Little Sure 25 watt stereo amplifier. Source audio originates at wire-wrapped pins 5, 7, and 9 on the mobo hdAudio header, routes to amplifier, to TIP31 circuits, and finally to LEDs for the TB Apollish and mobo underglow acrylic. I added four LEDs -- two on each channel -- to the little amplifier just to provide some kinetics in a dark spot in the case. The transistors are TIP131c's -- these are just higher voltage variants of the TIP31 NPN transistor. TIP131c's were chosen because that's what my local parts shop had in stock at the time. Any of the TIP31 variants will work just fine. For that matter, nearly any NPN transistor will work -- just keep an eye on voltage ratings. The audio switching circuit couldn't be simpler. A search will find instruction all over the web. Here's a URL to a simplified diagram: www.instructables.com If you use this graphic ...
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