wants some lights for my bang

[907tacokid 10+ year member]

alright so im new here and dont really know if you all can help me with this but hey might as well try right?

i have two sonic soundlab ten inch transonic subs (700-900rms) running at 1000 each off a hifonics brutus 2100rms amp. inside a ported obcon prefab box, hifonics zeus 6.5s in all four corners, two 12mm hifonics tweeters mounted into dash, dual 2channel speaker amp for front two mids and tweets, back are on deck.

i want to add lights like light emiting diodes or light bars or whatever that i can wire eather into the speakers (subs or 6.5s) and so they strobe to the beat. how i can do that or if anyone has a company that has a system that does it. it would be great if it was a septerat box, that is wired to the leds or light bar and then i can just plug in some RCA wires into it so it gets a clear signal. i dont know if its posible but i think it would be a great addition to my truck. so let me know if you know of anything or know how i can make my own. thank you for your time.

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[Sleeklsc 5,000+ posts]

This brings me back to the 90's.....

 

[keep_hope_alive Premium Member]

yea, this is pretty easy, really.

just take a bridge rectifier and a drop resistor and an led. the resistance is high enough that the amp won't notice a change in load.

i did this a while back, lasted for years, no problem.

take the sub wire output into the bridge rectifier input. from the rectifier output, go through the resistor and LED in series. one resistor for each LED. you only have about 20mA of current for each LED, so size the rectifier based on that. if you want a lot of LED's, then you may want to run them in groups of three. your drop resistor will vary based on how many LED's it serves. size the resistor based on the maximum voltage you expect to get out of the amp.

if you need a lesson on how to calculate the LED drop resistor, let me know.

 

[keep_hope_alive Premium Member]

also note that each color of LED has a different voltage drop. so you need to determine how many LED's and what color, then we can determine the voltage drop and current required to size the resistors and bridge rectifier.

 

[907tacokid 10+ year member]

ok sorry it took me so long to get on. i am not sure about how to do all that. i have the resorces and i am in an electronics class learning about all the different resistors and stuff like that but i havent been in the class long enough to understand all what you were talking about.

i have (6) 3 LED strips that i got for a strobing box. there all blue.

im not sure how to add the resistors or the other thing (not even sure what that is)

thanks for your reply by the way!

 

[907tacokid 10+ year member]

This brings me back to the 90's.....

haha i was born in the 90s so i didnt get to experience that era. sad, i love lights and loud music.

 

[keep_hope_alive Premium Member]

Light Emitting Diodes (LED)

LED Resistor Calculator

LED Dropping Resistor Calculator

these links should help you. you need to know the forward voltage drop of each LED and the rated current. you can measure this with a DMM if you don't have a datasheet for them.

you're simply applying ohm's law to devices in series. LED's have a fixed voltage drop. the current through all of the series devices is the same, and by sizing the resistor you are setting what the current is based on the voltage drop across the resistor. the voltage drop across the resistor is simply the source voltage minus the voltage drop of the LED string.

blue LED's are typically around 3V drop for each, but you need to verify with your string. you are welcome to measure your string. you could start with a 1000ohm resistor in series, powered by a 12V supply, and measure the drop. then resize the resistor using ohm's law. you'll have one resistor per string.

as for the bridge rectifier - just go buy one at Radio Shack rated for 1A. the AC inputs (labeled with a ~) are connected to the sub terminals. the DC outputs (labeled + -) go to the LED strings.

i can draw a diagram later.

 

[907tacokid 10+ year member]

thanks man. ill do some research and try it out. if it works ill post a youtube video link on here for ya!

and if you could draw a quick diagram it would help alot. just show where the pieces your talking about go and how your saying to wire it if posible. i just need a visual to go with the instructions. thanks again man!

 

[orphe 10+ year member]

Back in the 90's they had a special florescent light that would flash with the music.

It was sound sensitive and had an adjustment knob on it. Find it in wallmart or at a flea market. Back then it cost around $20 - $30.

 

[keep_hope_alive Premium Member]

diagram will come tomorrow when i have AutoCAD access.

 

[BnGRacing 10+ year member]

This is the only light system I'd be willing to add to a custom install;

A half dozen Class-A single ended tube amps in a trunk/hatch is a fantasy of mine...would **** during the summer though

 

[dragnix 5,000+ posts]

This is the only light system I'd be willing to add to a custom install;

A half dozen Class-A single ended tube amps in a trunk/hatch is a fantasy of mine...would **** during the summer though

expensive lights

 

[907tacokid 10+ year member]

ya those lights look a little to much for me. im not looking to creat the worlds best custom install, its only my second install (of my own, 5th including people paying me to install theres) im just looking to add some (rave) theme to my ride.

 

[lilpride 10+ year member]

Lol those are not lights they are tubes from a tube amplifier haha.

here is the easiest way to do what you want

Amazon.com: 15" Logisys Deluxe Sound Activated Cold Cathode Complete Light Kit with Dual Output Inverter (Blue): Electronics

 

[907tacokid 10+ year member]

awsome. the site didnt say how it works? does it get wired into the speaker output? or does it get hooked into batterie and then internal microphone pic up the sound?