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  1. KJ6EAD

    Time taken for battery to drain completely

    Factoring in the high (almost 2C) rate, some unknown discharge curve for the battery, the unknown load and the probability of "optimistic" battery rating, I'd guess even less, maybe 5-10 minutes, but I didn't want to confuse the issue with too many facts so I presented only the basic ideal...
  2. KJ6EAD

    Beginner getting into electonics - help please

    I agree with all of the previous responses. Now you have one more opinion to contend with.
  3. KJ6EAD

    Time taken for battery to drain completely

    350W / 24V = 14.6A 8Ah / 14.6A = 0.5h
  4. KJ6EAD

    Headphones (ATH-M50)

    That just means that the butane canister is not designed to be refilled after it's empty. You can use it as many times as you like to refill the iron.
  5. KJ6EAD

    led through electricty

    It does need a resistor or some other current regulator. If you use a resistor, the value will depend on the LED specifications. Your reference to a motor is unclear. Are you thinking of a persistence of vision (POV) display?
  6. KJ6EAD

    led through electricty

    Yes, I do it all the time.
  7. KJ6EAD

    WD40 ok as switch cleaner

    Just a note. Never use silicone products on electrical contacts. They form silicates (glasslike insulative material) in the presence of an arc.
  8. KJ6EAD

    C&K 238 Bringing an unused system back to life

    Happy reading. :D http://www.alarmhow.net/manuals/CandK/238/238%20Installation%20Manual.pdf http://www.alarmhow.net/manuals/CandK/238/238%20LED%20Plus%20User%20Manual.pdf http://www.alarmhow.net/manuals/CandK/238/238%20Refernce%20Manual.pdf
  9. KJ6EAD

    Headphones (ATH-M50)

    Welcome to the wonderful world of litz wire. http://en.m.wikipedia.org/wiki/Litz_wire Google "stripping litz wire". You'll find a variety of chemical, flame and mechanical methods touted. I'd try paint stripper first since it's the least likely to damage strands or make them difficult to...
  10. KJ6EAD

    Aiwa FX-WX9400 Double Cassette Deck

    It's possible that a DC supply voltage is low or full of ripple.
  11. KJ6EAD

    IDC Socket and ribbon cable

    IDC (insulation displacement connector).
  12. KJ6EAD

    LED cycle RGB

    The datasheet voltage tolerances apply to the LEDs collectively. They aren't applicable to individual LEDs. While it's possible to test and select LEDs for higher current at lower voltages, it's an unenviable chore. Using CocaCola's approach and assuming a 2 X AA supply, you'd be forced to...
  13. KJ6EAD

    Removing Black Plastic/Rubber Fill From Motorcycle Part

    It's called potting compound. Removal method depends on potting material. Google "potting compound remover" and "potting compound removal". If the material is very hard and brittle, it's probably epoxy but if it's a little soft and the surface seems slightly sticky and discolored from...
  14. KJ6EAD

    Shop Fox Mini Lathe Circuit Board

    I don't know; I've never seen your circuit board.
  15. KJ6EAD

    Shop Fox Mini Lathe Circuit Board

    Yes, but it's likely a drive component failed.
  16. KJ6EAD

    Hitachi TV Ribbon Connector name

    They're actually flat flex connectors, not ribbon connectors. Here's a small tutorial. http://dkc1.digikey.com/us/en/tod/FCI/FlatFlexConnector_NoAudio/FlatFlexConnector_NoAudio.html
  17. KJ6EAD

    Waterproor threaded power sockets?

    http://www.onboard-electronics.ltd.uk/series.asp?did=179&sid=367 http://www.ltw-tech.com/product/product.php?la=en-us&ps=21
  18. KJ6EAD

    Powering two circuits from one battery

    ...which is difficult to do as often it requires cutting a hard spring wire in a difficult location, soldering near soft plastic and other difficulties. It will usually be easier to mount two single cell holders side by side than to find and purchase a parallel-wired holder or modify a...
  19. KJ6EAD

    MAKE: Experiment 4

    The internal fuse is only used when measuring current. Other functions of the meter are unaffected when it's blown. You're going to have to replace it. Take it out of the meter and use one of the resistance settings to confirm that it's open (∞Ω). It will read the same as the leads connected to...
  20. KJ6EAD

    What are those circuit boards called that just have all the single holes ready to use

    Pad-per-hole prototyping PCB to differentiate from other types. Syntax is my favorite because it's double sided with plated through holes. http://www.circuitspecialists.com/pc403.html http://www.syntax.com.tw/index.php
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