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I have a setup of 6 RGB diodes in parrallel, each diode has seperate resistors for each color.

My problem is, when i connect the diodes on a 12v supply, all leds and every color works, but when i connect the diodes on my speakers, green and blue dont work on 1 diode, red works on all.

What could posibbly cause this problem? If leds work normaly if connected to 12V, but 1 doesnt work if connected to speaker.

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closed as unclear what you're asking by winny, PeterJ, laptop2d, nidhin, JYelton Oct 10 '17 at 17:10

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    \$\begingroup\$ Why on earth are you connecting LEDs to speakers? \$\endgroup\$ – Polynomial Oct 8 '17 at 16:35
  • \$\begingroup\$ Thats besides the point but yeah.. i want them to "puls" by the beat. And yeah i know thats not how you do it but ok... \$\endgroup\$ – FlawlezzJaxy Oct 8 '17 at 16:37
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    \$\begingroup\$ Use the schematic editor that comes with this site and add two schematics: (1) The 12 V schematic; and, (2) your speaker schematic. I think that if you put some work into your question here, that you will get some work back in the form of a useful answer. \$\endgroup\$ – jonk Oct 8 '17 at 16:48
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    \$\begingroup\$ It would be the considerate thing to do as it would require less guessing on our part, fewer questions, etc. It's up to you, though. You do what you want. \$\endgroup\$ – jonk Oct 8 '17 at 16:54
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    \$\begingroup\$ There is a schematic button on the editor toolbar. It's easy to use. You need to supply part numbers and links to the datasheets for the LEDs. \$\endgroup\$ – Transistor Oct 8 '17 at 20:09
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Your RED are probably not working at full current and BG may be backwards damaged or just not enough audio power, but have 50% higher voltage threhold.

To get the same brightness, they have to be equally efficient and with 12V into 8 Ohms that is 18 watts of audio power.

If they are not ESD protected or back-front connected inparallel, then worry about reverse V damage>-5V

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  • \$\begingroup\$ This is an interesting answer. 1. Red leds seem to work at full power almost all the time. Its the first time i hear about backwards damage, it could be a posibility. 2.I tried changing volume to max still one diode didnt work. 5 leds work 1 not, i do not think its a problem with power. But the waird thing is that on 12v all 6 GB work. 3. How to know if they r ESD protected? How does backfront parrallel look like? 4. I fixed it by changing the one diode and now all 6 work on audio. But im interested to know about ESD and reverse V dmg \$\endgroup\$ – FlawlezzJaxy Oct 8 '17 at 17:41
  • \$\begingroup\$ MOST LEDs are not ESD protected unless there are two Leds , 1 for each polarity. I only buy ESD protected types when avail. Others can add a shunt diode in reverse across each Light Emitting Diode. ( What/where was that one diode?) \$\endgroup\$ – Sunnyskyguy EE75 Oct 8 '17 at 17:56

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