I've been doing some more reading and was considering trying to wire a piece of the strip to be sound activated from an AUX input following something along these lines (along with a 1k resistor between the incoming positive audio signal and the transistor's base leg):
Hoping to bounce some ideas/ get tips if I'm headed in the wrong direction.
I figure I would wire it using a chopped fan cable (per your suggestion) and probably some 22 awg wire for the in between bits (ie ground to the tip31 transistor).
As far as power sources go, do you have any recommendations about things to stay away from? I've considered the following options:
-Power from a 4pin molex right off the PSU (molex --> chopped 3pin)
I figure powering from the PSU would be the safest/easiest. The only concern I have is eating up too many of the peripheral 4pin outputs from my PSU. I could get a 4pin splitter, but I'm not sure what the power draw on a foot of LED strips would be like in comparison, to say, a case fan.
-Power from a fan header on the motherboard
I've read people have concerns about splitting and running multiple fans off a motherboard header reducing the efficiency of the motherboard and again, I'm not sure how the power usage of the LED strips would compare.
-Power from the 4 fan header that is included in the Antec Eleven Hundred
Powering from one of the four headers built into my case (powered by one 4pin molex coming from the PSU) would seem like a simple solution and I may end up doing this unless you think there may be problems.
-Power from a fan speed control front panel.
Finally, powering from a fan controller might seem to provide the most options. I would think that with the circuit wired directly to a power source (say the PSU) the LEDs would always be on (or off, I'm not sure how the transistor effects it), but if I had it wired to a fan controller I could have the option to turn the lights off if I so desired. That is unless the knobs controlling the fan speed would have no effect on the power sent to the LEDs? Also, it would be interesting if the controller knobs were able to adjust brightness, however I'm not sure how LED's react to dimming.
-Power from an LED distribution block.
As for the AUX connection, I was thinking I could run it out the back of the case and hook it up to a splitter with my stereo plugging into the other jack and then plugging the combined into the audio port on the motherboard.
Also, I shouldn't have any problem daisy-chaining multiple strips together right?
Lastly, once each of these connections are set with solder, are there any other things I could do to protect them? I know you mentioned glue, what about heat shrink tubing or electrical tape? I guess I should ask, any suggestions for wire source?
I know there are some convenient cathode solutions, however those are sound activated through a microphone and I'm just not convinced they are sensitive enough. Plus this looks like a fun project!Edited by fourdot00 - 8/27/12 at 1:42am