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  1. W

    Knight Rider with Halogen Bulb

    I wonder if this same effect could be made with a 4017 with some electrolitics capacitors at the output to make that flash trail behind or some delay when the light change from one channel to another.
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    Simple O2 meter with LM3915

    Hello Guys! I'm doing a O2 meter for my car because pay about $150 bucks for a simple meter will not do for me, too much. So, i want to build a meter with 2 LM3915 for better resolution but i have a few questions: 1 - the car voltage is too unstable, there is too much oscilation, mechanical...
  3. W

    VHS tape to VCD

    Here you will find all the information you need: http://www.videohelp.com/
  4. W

    Surround Sound for car audio

    Here is the final board and schematic for the circuit, i also included the project i've made with Eagle, enjoy! Hafler.zip Hafler.pdf
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    Surround Sound for car audio

    Thanks Audioguru
  6. W

    Surround Sound for car audio

    Hello guys! Well i did a prototype version (no PCB yet), in my tests the circuit, well, it work some how the way i wanted, but for a very cheap circuit it will do. Now i need some advice, i was reading a book named "Car Audio Secrets" that came with a "Time Alignment" schematic for the...
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    Surround Sound for car audio

    Ok, got the idea, i will go by your design then. Thanks.
  8. W

    Surround Sound for car audio

    So, in alt-a what sugestions do you have? Should i duplicate that circuit and connect that to ICb pin 5 or the modification that you have made is the way to go. I've did the second option because i did not understand your modification at the pot connection.
  9. W

    Surround Sound for car audio

    Ops, my mistake! Let me fix that.
  10. W

    Surround Sound for car audio

    Thanks audioguru. One thing that mess my mind aroud was the fact that there the circuit is using L/E channel input in to +/- of the IC, but you solve it! Now i have made two versions, one that you have fixed and another one based on your modification.
  11. W

    Surround Sound for car audio

    I've been messing around a bit, but i need to build this to make further tests.
  12. W

    Surround Sound for car audio

    Ok, fixed. I will work on the values to work with simple supply. Tell me something, what about noise? What should i consider, killing?
  13. W

    Surround Sound for car audio

    This could be a problem, the circuit ask for a +12v, -12v and GND, maybe i will have to work out an dc-dc converter for this circuit.... or not. Maybe i could do something like this but the voltage will be too low (+- 6v), the second option i think it will not give the circuit enought power...
  14. W

    Surround Sound for car audio

    Thank for the reply..... But, the main problem is how to power up the Hafler circuit, is opamp based and this kind of device need a +12vdc/-12vdc (symmetric) ???
  15. W

    Surround Sound for car audio

    Oh... by the way... I have all the power amps that i need in my car, you can see my car pictures at this address.
  16. W

    Surround Sound for car audio

    Hello Sukhbinder, thanks! The effect that i want is the same as an Home Theater, do you know if this circuit will do the same efect? I'm working with the Hafler Surround Sound (waiting for the IC) now, tell me something, do you think that if i use a filter to make a voice attenuation i will get...
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    Surround Sound for car audio

    Thanks audioguru!!
  18. W

    Surround Sound for car audio

    Hello guys! I was wondering, if i build a "spatial stereo" with the Philips TDA3810 and using my car audio REAR output, could this make the effect of hearing  everyting but vocals and bass in the rear speakers of the car? I think it would be a nice effect to let the front channel to be normal...
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