Lighting up the inside of a subwoofer
Bookmark this page:
 Yahoo!
 Google
 Windows Live
 del.icio.us
 digg
 Netscape
|
|
|||||||||||||
|
Posted by on January 26, 2007, 6:38 pm
Please log in for more thread options Hey everyone, I am an undergrad in ECE and I am working on building the box for a double vented 500W subwoofer. I want to light up the inside with some kind of blue light so that it shines out the side (thick clear material) and through the two vents. I also want to put orange LEDs around the outside of the speaker (I go to the university of illinois, school colors). I want the lights to pulse with the bass of the subwoofer though. I haven't taken enough courses to design my own circuits yet, so I have been googling for hours looking for circuits that involve a mic and a low-pass frequency filter. I have a few questions that I am hoping someone can give me insight on: 1) Will there be a problem with using a microphone inside the box? I am wondering if the lights will come on out of phase with the beat and whether or not it will just always be on because its inside the box. 2) Would it be smarter to tap into the two wires going into the woofer instead of using a mic? And if so, will the high current be a problem for such a simple circuit? Would it be more effective to put it in series or parallel with the woofer? Are there overload concerns with hooking it up to a 500w amp? 3) Am I going about this all wrong? I am open to advice and to alternative to what my current thoughts are. I am also unsure of how to power the circuit if its a seperate one with a mic. I don't know if tapping off the transformer is such a good idea, seeing as its a 250$ amp. I appreciate any feedback. Thanks for your time. | |||||||||||||
|
Posted by Lord Garth on January 26, 2007, 7:11 pm
Please log in for more thread options Repost to alt.binaries.schematic.electronic and I'll send you some info | |||||||||||||
|
Posted by jasen on January 27, 2007, 6:33 am
Please log in for more thread options
> Hey everyone,
> > I am an undergrad in ECE and I am working on building the box for a > double vented 500W subwoofer. I want to light up the inside with some > kind of blue light so that it shines out the side (thick clear > material) and through the two vents. I also want to put orange LEDs > around the outside of the speaker (I go to the university of illinois, > school colors). I want the lights to pulse with the bass of the > subwoofer though. I haven't taken enough courses to design my own > circuits yet, so I have been googling for hours looking for circuits > that involve a mic and a low-pass frequency filter. I have a few > questions that I am hoping someone can give me insight on: > 1) Will there be a problem with using a microphone inside the box?
you'd need one that rated for very high SPL. > am wondering if the lights will come on out of phase with the beat and
> whether or not it will just always be on because its inside the box. ??? > 2) Would it be smarter to tap into the two wires going into the woofer
> instead of using a mic? And if so, will the high current be a problem > for such a simple circuit? > Would it be more effective to put it in > series or parallel with the woofer? Are there overload concerns with > hooking it up to a 500w amp? parallel (with large resistors in series with your circuits input). problems most unlikely. getting in series with the sort of current needed to put 500W into a 8 ohm load is'nt worth the bother, > 3) Am I going about this all wrong? I am open to advice and to
> alternative to what my current thoughts are. I am also unsure of how > to power the circuit if its a seperate one with a mic. I don't know if > tapping off the transformer is such a good idea, seeing as its a 250$ > amp. google for colour organ. Bye. Jasen | |||||||||||||
|
Posted by John Larkin on January 27, 2007, 12:22 pm
Please log in for more thread options
On 26 Jan 2007 15:38:50 -0800, Jacob.Block@gmail.com wrote: >Hey everyone,
> >I am an undergrad in ECE and I am working on building the box for a >double vented 500W subwoofer. I want to light up the inside with some >kind of blue light so that it shines out the side (thick clear >material) and through the two vents. I also want to put orange LEDs >around the outside of the speaker (I go to the university of illinois, >school colors). I want the lights to pulse with the bass of the >subwoofer though. I haven't taken enough courses to design my own >circuits yet, so I have been googling for hours looking for circuits >that involve a mic and a low-pass frequency filter. I have a few >questions that I am hoping someone can give me insight on: > >1) Will there be a problem with using a microphone inside the box? I >am wondering if the lights will come on out of phase with the beat and >whether or not it will just always be on because its inside the box. > >2) Would it be smarter to tap into the two wires going into the woofer >instead of using a mic? And if so, will the high current be a problem >for such a simple circuit? Would it be more effective to put it in >series or parallel with the woofer? Are there overload concerns with >hooking it up to a 500w amp? > >3) Am I going about this all wrong? I am open to advice and to >alternative to what my current thoughts are. I am also unsure of how >to power the circuit if its a seperate one with a mic. I don't know if >tapping off the transformer is such a good idea, seeing as its a 250$ >amp. > >I appreciate any feedback. Thanks for your time. What is ECE? What year are you in? John | |||||||||||||
|
Posted by ehsjr on January 27, 2007, 1:38 pm
Please log in for more thread options
Jacob.Block@gmail.com wrote: > Hey everyone,
> > I am an undergrad in ECE and I am working on building the box for a > double vented 500W subwoofer. I want to light up the inside with some > kind of blue light so that it shines out the side (thick clear > material) and through the two vents. I also want to put orange LEDs > around the outside of the speaker (I go to the university of illinois, > school colors). I want the lights to pulse with the bass of the > subwoofer though. I haven't taken enough courses to design my own > circuits yet, so I have been googling for hours looking for circuits > that involve a mic and a low-pass frequency filter. I have a few > questions that I am hoping someone can give me insight on: > > 1) Will there be a problem with using a microphone inside the box? I > am wondering if the lights will come on out of phase with the beat and > whether or not it will just always be on because its inside the box. > > 2) Would it be smarter to tap into the two wires going into the woofer > instead of using a mic? And if so, will the high current be a problem > for such a simple circuit? Would it be more effective to put it in > series or parallel with the woofer? Are there overload concerns with > hooking it up to a 500w amp? > > 3) Am I going about this all wrong? I am open to advice and to > alternative to what my current thoughts are. I am also unsure of how > to power the circuit if its a seperate one with a mic. I don't know if > tapping off the transformer is such a good idea, seeing as its a 250$ > amp. > > I appreciate any feedback. Thanks for your time. > Here's an interesting experiment you can try that may give you what you want with a bjt. Wind some (10 ?) turns of hookup wire around one of the wires that connects the subwoofer speaker to the circutry that drives it to make a pickup coil. Then do this: PNP + 12 --------------------- ---+ e\ /c | - | ------ ----- | [1K] |Pickup|--|~ +|---[1K]---+ | | | | BR | a| [LED] | Coil |--|~ -|---+ [D1] | ------ ----- | | | | [D2] | | | | Gnd ----------------+------+----+ If the LED lights at all the levels of audio that you will use, you're in business. You can use the output at the collector to drive the gate of a mosfet, and switch however many LEDs or circuits you want. Ed | |||||||||||||
| Similar Threads | Posted |
| Lighting up the inside of a subwoofer | January 26, 2007, 6:38 pm |
| I zapped my subwoofer with static electricity | February 6, 2006, 10:04 am |
| USB: Can I Add another device by soldering it inside? | November 3, 2004, 9:54 pm |
| How do you mount a pcb inside a case? | December 25, 2006, 10:08 pm |
| Problems about magnet moving back n forth inside da solenoid | November 2, 2005, 11:35 am |
| Solar Lighting | August 17, 2004, 4:28 pm |
| lighting circuit help | February 20, 2005, 7:43 pm |
| LED hallway lighting | April 3, 2005, 8:39 am |
| PWM lighting quest! | August 25, 2006, 4:29 pm |
| REQ : Stepped lighting. | March 30, 2007, 4:27 pm |
| Low Voltage lighting vs A.C. | June 13, 2007, 7:44 am |
| Lighting Capacitors ? | April 8, 2008, 3:51 am |
| landscape lighting | June 11, 2008, 1:54 pm |
| Replace 12V DC lighting with LED | October 5, 2008, 3:33 pm |
| LED breakthrough may revolutionize lighting | October 25, 2008, 5:49 pm |
>
> I am an undergrad in ECE and I am working on building the box for a
> double vented 500W subwoofer. I want to light up the inside with some
> kind of blue light so that it shines out the side (thick clear
> material) and through the two vents. I also want to put orange LEDs
> around the outside of the speaker (I go to the university of illinois,
> school colors). I want the lights to pulse with the bass of the
> subwoofer though. I haven't taken enough courses to design my own
> circuits yet, so I have been googling for hours looking for circuits
> that involve a mic and a low-pass frequency filter. I have a few
> questions that I am hoping someone can give me insight on:
>
> 1) Will there be a problem with using a microphone inside the box? I
> am wondering if the lights will come on out of phase with the beat and
> whether or not it will just always be on because its inside the box.
>
> 2) Would it be smarter to tap into the two wires going into the woofer
> instead of using a mic? And if so, will the high current be a problem
> for such a simple circuit? Would it be more effective to put it in
> series or parallel with the woofer? Are there overload concerns with
> hooking it up to a 500w amp?
>
> 3) Am I going about this all wrong? I am open to advice and to
> alternative to what my current thoughts are. I am also unsure of how
> to power the circuit if its a seperate one with a mic. I don't know if
> tapping off the transformer is such a good idea, seeing as its a 250$
> amp.
>
> I appreciate any feedback. Thanks for your time.
>