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  1. KJ6EAD

    Different soldering techniques

    I'll point out two other advantages to the modern method. First; by heating the materials to be joined before applying the bulk of the solder (a small amount is carried on the tip to form a thermal bridge), better wetting is achieved and second; the quantity of solder used to form the joint can...
  2. KJ6EAD

    Controlling amplitude of Sin and triangle waves...

    I had thought of trying to tame the amplitude flatness of an XR-2206 in a crude way by using a dual deck rotary switch so that changes in waveform selection or frequency range would make a corresponding amplitude adjustment. I lost interest in the project when I realized I could probably go...
  3. KJ6EAD

    Newbie circuit modification

    ¼W will be sufficient.
  4. KJ6EAD

    Looking For A Low RPM <30rpm Motor

    If you're in the US, maybe one of these will work. http://www.allelectronics.com/make-a-store/category/400400/Motors/DC-Gear-Motors/1.html
  5. KJ6EAD

    Make Ex 5 Notes

    You're right. I've only seen it described the other way (Joule = Watt second).
  6. KJ6EAD

    LEDs flashing to the sound of music

    I've never priced it either. Google is your friend. You may even have a local shop that carries Velleman products. The schematic doesn't list a value for C5 but you change it by replacing it with another capacitor of a larger or smaller value. The portion of the circuit that includes C5 is an...
  7. KJ6EAD

    Make Ex 5 Notes

    Nice try with sophistry. It's more a matter of convention and definition than of mathematical manipulation anyway.
  8. KJ6EAD

    Make Ex 5 Notes

    Other way around. A Joule is a Watt second. http://en.m.wikipedia.org/wiki/Joule
  9. KJ6EAD

    LEDs flashing to the sound of music

    Velleman MK186 (kit) or VM186 (assembled). http://www.vellemanusa.com/products/view/?id=525680 http://www.vellemanusa.com/products/view/?id=525686 You can alter the frequency response to make the circuit more responsive to bass and less responsive to treble by changing the value of C5...
  10. KJ6EAD

    Electronics for the right-brained

    Your approach would convert the learning effort on your part into a massive teaching effort on our part and would still result in frustration. A more traditional method starting with basic math and algebra would yield real understanding and ultimately require less effort. I don't know where you...
  11. KJ6EAD

    Electronics for the right-brained

    That's not really possible. Electronics is an application of physics and requires some math. These are the closest to your requirement that I know of. Getting Started in Electronics: http://www.amazon.com/gp/aw/d/0945053282 Make: Electronics...
  12. KJ6EAD

    Fuse burnt on a camcorder

    This is probably a correct replacement. http://www.littelfuse.com/products/fuses/surface-mount-fuses/nano-2-fuses/453/45302_5.aspx
  13. KJ6EAD

    create a 110 volt ac to 5 volt dc.

    Viola. Merriam Webster English Dictionary Main Entry:*2vi·o·la*Pronunciation:*\vē-ˈō-lə\Function:*nounEtymology: Italian & Spanish, viol, viola, from Old Occitan, violDate: circa 1724 :*a musical instrument of the violin family that is intermediate in size and compass between the violin and...
  14. KJ6EAD

    create a 110 volt ac to 5 volt dc.

    Is this a school assignment?
  15. KJ6EAD

    DMTECH LCD-TV

    That looks like a power supply problem. Try monitoring the DC rail while going through the startup and run to failure to confirm.
  16. KJ6EAD

    Hallowen project (LED)

    I've simulated lightning quite effectively by using a sound to light circuit driven from a thunder sound effects track.
  17. KJ6EAD

    Sharp Microwave Fan not working

    You probably should refer it to someone who is knowledgeable about the hazards of high voltage and microwaves. Although fans are one of the easiest parts to replace if they're available, there's the possibility that the fault lies with a relay or other control component. At least one vendor...
  18. KJ6EAD

    have a general question about "something" in my stereo receiver

    Try to find out which component(s) are heating excessively.
  19. KJ6EAD

    Beginner getting into electonics - help please

    Don't blame me. I didn't do it. It was John Monks or CocaCola in their debate about the number of electrons that can dance on a diode junction. ;) The OP doesn't know the difference between parallel and series circuits and has started a new thread on this topic over at AAC...
  20. KJ6EAD

    Beginner getting into electonics - help please

    It's not that complicated. If your voltage is well-regulated at 12V, then using 3 LEDs and a 100Ω resistor (5%) in series will run at 18mA. You can add as many of these units in parallel as you like as long as you stay under the current capability of the power supply. 400mA / 18mA = 22 groups of...
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