![]() ![]() And who knows if these LEDs have the sharp I-V knee that characterizes the low impedance LEDs? I thought I read in this forum (SY, you?) that the older red LEDs seemed to exhibit the lowest impedance. Maybe there’s just a series resistor to flatten the sharp knee? So you’d have to modify the PCB to convert it to series-parallel connection according to your audio voltage needed. There is a clue in the ad about how they can be connected to twice the voltage (220V) although with shortened life. I wouldn’t be surprised to learn that there is also some current-limiting device in series. I doubt that there could be much “wiring” at this price. The LEDs are bound to be in series, as Gingertube says, and they must be soldered into a PC card carrier that connects them at way. These 110 V screw-in lamps are certainly cheap enough to experiment with. I don’t suggest an expensive and silly-looking taillight (although the 13 to 14 volts they’re designed to run on is a lot closer to what an EL84 might need in the cathode). Sick, huh? But maybe the basic idea of using an existing LED lamp array is worth pursuing. Whenever I see these massive LED arrays blinking in front of me at a stop light (itself an LED array.hmmm), I can’t help but think of audio. I had jokingly suggested to SY a long time ago to find a pair of Cadillac taillights for his next project. ![]()
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