so i was wondering...
im in the process of constructing a battery powered boom box, and i got some leds to make it look nice
but if i wired them to the amp output so they go with the music would it affect the sound that much? i dont really want any distortion or loss of volume.
here are the LED's
there is tech spec on the page somwhere. but it means nothing to me lol.
thanks!!!
im in the process of constructing a battery powered boom box, and i got some leds to make it look nice
but if i wired them to the amp output so they go with the music would it affect the sound that much? i dont really want any distortion or loss of volume.
here are the LED's
there is tech spec on the page somwhere. but it means nothing to me lol.
thanks!!!
Wouldn't LEDs across the output have a reverse voltage problem?
Yes, but limited current will prevent them from burning up.
so would i need only one resistor in a series circuit of 5 led's?
Yes and a rectifier diode would be nice also a full bridge without a filter capacitor better still.
Better to use an LED bar graph driver, like an LM3914/3915/3916 (whichever are the logarithmic ones), or one from a more consumer product oriented brand like Rohm. Or do the brute force comparator thing using LM324 and resistor ladders. Download a Rane mixer schematic and see what circuit they used. Or salvage the chip and display from scrapped consumer gear. Wiring a matrix of LEDs and scanning with a 4017 should make for a lively display.
For higher power stuff, Velleman sells a speaker-powered LED display kit, K4307.
http://www.vellemanusa.com/downloads/0/manual_k4307.pdf
Seems overpriced (two channels worth would cost more than I paid for my new Blu-ray player), but the schematic and parts list are in the manual (see above).
Search ebay for LED vu and a few other kits show up.
For higher power stuff, Velleman sells a speaker-powered LED display kit, K4307.
http://www.vellemanusa.com/downloads/0/manual_k4307.pdf
Seems overpriced (two channels worth would cost more than I paid for my new Blu-ray player), but the schematic and parts list are in the manual (see above).
Search ebay for LED vu and a few other kits show up.
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