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  1. KJ6EAD

    Potentiometer Value and Rating?

    Here you go. Have fun with your new heater. http://www.alltronics.com/cgi-bin/item/1RH500/RH500/1-Ohm-500-Watt-Rheostat
  2. KJ6EAD

    Finding antenna on key fob

    For the receiver, Elsema's highest gain stock antenna is the ANT433M. If that isn't adequate, look for an amplifier or a directional antenna if you can use a directional in your application.
  3. KJ6EAD

    Stereo receiver cutting randomly in and out

    Exactly what I was thinking. Sony receivers of a certain era had a lot of problems with speaker relays, either cold solder joints, bad relays or weak power supplies for the coils. To isolate a mechanical intermittent, try poking the board very gently with a thin non-conductive probe. A bamboo...
  4. KJ6EAD

    Hot Swapping Headphone Jack - Temporary Shorts During Insertion - How To Remedy?

    I!? A little attribution is in order. Ronv on the 'All About Circuits' forum provided the solution and had to overcome your resistance (pun) to it by explaining it twice. Hot Swapping Headphone Jack - Temporary Shorts During Insertion - How To Remedy?
  5. KJ6EAD

    Can Anyone Identify This Component?

    I doubt that since none of the other components match. The T3 position on the board should be swarming with resistors for example.
  6. KJ6EAD

    What is the name for those plastic clamshells ??

    Small project boxes may be appropriate. I've used Hammond 1551 boxes for things like you're describing. http://www.hammondmfg.com/dwg9.htm
  7. KJ6EAD

    No sound front panel audio jack (need help)

    There's a possibility that the jack is damaged or has foreign matter in it. Both are difficult to determine definitively without some experience. Another possible failure is the jack's solder connections to the PCB. This can be determined by careful visual inspection and continuity checks from...
  8. KJ6EAD

    Voltage regulator for LED panel

    There is at least one powerbank that delivers up to 19V. http://www.tekkeon.com/products-mypowerall.html
  9. KJ6EAD

    How To Annoy Those Helping You Out

    Even worse. It's txt spk with an Aussie accent. Everyone knows they talk funny. ;)
  10. KJ6EAD

    ElectronicsPoint Facebook Group!

    I fail to see how Facebook can repair a server or substitute for any of the main functionality of the forum software. This seems like it would be a non-solution to a non-problem. My sister in law says half in jest that the forum is Facebook for nerds.
  11. KJ6EAD

    Very Fine Cable?

    Kynar 30 AWG wire-wrap wire is often used for repairs and modifications.
  12. KJ6EAD

    Remote Control - The Right Way To Fix It

    The blob is called a COB (chip on board). It is unrepairable.
  13. KJ6EAD

    12V DC convert for 9V DC

    My thought exactly, and even if it wants 9V it will probably work well on 12V. By the way, you should be aware that you're "bugging" your own vehicle, making the conversation inside available to anyone nearby with a modicum of technical knowledge.
  14. KJ6EAD

    Very compact voltage dropdown

    How long do those alarms usually operate on two AA cells and what's the minimum run time that will suffice on the new battery?
  15. KJ6EAD

    Problem with my music player

    I'm guessing that one or both devices has a signal ground that's above the level of the power ground. Assuming no change in the power connections, you can use audio transformers to couple each of the audio signals (left and right channels) from the player to the amplifier. This will isolate the...
  16. KJ6EAD

    XK X250 FPV Camera Antenna Repair

    It's also possible that it uses an amplified antenna where the connections would be power, ground/shield and signal.
  17. KJ6EAD

    Defective PCB/scroll saw

    It's a photomicrosensor, but as configured with an encoder disk it's an optical encoder. They are readily available but the good ones aren't cheap. A magnetic encoder is much more affordable and may be adequate.
  18. KJ6EAD

    HOW DOT PRINT PRINTER WORK

    My first programming experience involved a 10cps cylindrical print head clacking away on a continuous roll of paper and an octal paper tape punch and reader for program storage.
  19. KJ6EAD

    Joule Thief Wiring

    I stopped watching when the "presenter" twice referred to the emitter of a BJT as the "negative lead". He's using the mutual inductance of two surface mount inductors as a transformer. It's certain to be less efficient than designs where the magnetic fields are coupled through a traditional...
  20. KJ6EAD

    Determing how long a battery will last on given project?

    The circuit as designed will consume approximately 22W, 20W wasted as heat in the resistors and only 2W providing light. The resistors would need to be rated for 1W to prevent overheating since each will be dissipating nearly half a Watt! Don't let the combined output voltage of the batteries...
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