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  1. J

    Salt Water Capacitor Discussion

    Just out of curiosity, have you tested a standard capacitor to see that the meter is functional? Just thought I would mention it. :)
  2. J

    Wanted: PIC programmer.

    I am looking for a PIC programmer like the pickit2/3. Something that is compatible with MPLAB is preferable. Maybe someone bought one and now has no use for it. I will be willing to take it off your hands for a reasonable price. Or at the very least, does anyone know where I can get one for...
  3. J

    Salt Water Capacitor Discussion

    my first thought was the MM charged the cap as well when it was connected. But I don't know enough about them to actually say.
  4. J

    Salt Water Capacitor Discussion

    http://www.sparkbangbuzz.com/els/stat-gen-el.htm Don't you have to charge these first or is that not part of the capacitance test?
  5. J

    Salt Water Capacitor Discussion

    Maybe the plastic bottle you used is to thick for the voltage you tried?
  6. J

    48v or 96v ...... off grid setup

    halving your current needs means smaller conductors and cheaper prices. Plus you already have a 96V generator, what would you do with it if you needed to charge a 48V battery bank?
  7. J

    resistor rating help

    I believe it is the voltage that you will be reducing to control the fan speed. With that said, you will need to figure out the voltage drop across the resistor to figure out it's power requirements. I am not sure I know how to figure that value when motors are involved.
  8. J

    resistor rating help

    What is the purpose of the resistor?
  9. J

    Zenith IQB56W10 Television

    For $20 dollars a (2)piece set and the advice on that link you posted I would sure try to repair the tv if you think you have the skills. A lot better then paying couple hundred for a new set, don't you think?
  10. J

    LED vs Incandescent

    Got a picture of the circuit you was working on? Are you positive the bulb was not in series with the resistor?
  11. J

    Making Battery Pack for my RC-50 Loopstation

    Yeah if you run two packs in parallel it will double your power. You just have to be careful that the packs are equally charged. If there is a voltage difference between the two packs when hooked up there will be large currents between the batteries which is never a good thing. I would think...
  12. J

    Simple LED setup for motorcycle

    you don't need to fill up the fourth cell just to waste power. Just short it out. 4.5V double the capacity with 5 LED's or the same with 10 @ max efficiency.
  13. J

    Simple LED setup for motorcycle

    Why do you want to run 12V with only one LED per parallel run? That means you are dropping 12V-3.2V = 8.8V across the series resistor. This is just waste!!!!! You want to run as many LED's in series (per parallel run) as you can as close to the max voltage, this drops the least voltage across...
  14. J

    Simple LED setup for motorcycle

    if the voltage drop of each LED is 3.2V then wiring more then one LED in series with a 6V battery pack is gonna fail. Even worse if the forward voltage drop is closer to max of 3.8V. Not to mention a alkaline battery has a nominal voltage of 1.5 volts when it is brand new, it drops from there...
  15. J

    Making Battery Pack for my RC-50 Loopstation

    Your RC-50 has a current draw of 450mA @ 9V. http://www.eneloop.info/fileadmin/EDITORS/ENELOOP/DATA_SHEETS/HR-3UTGA_data_sheet.pdf According to the discharge chart you should be ok. At 450mA, you should be able to get full (or close) use out of the battery(s) before the voltage dips below the...
  16. J

    Floating base?

    How are you powering the arduino? You could use an external 5V regulator off the 12V battery and use that to power the arduino instead of it's usb port. Then you would have your common ground using one power source if you are that worried about it.
  17. J

    PC controlled relays

    This is really rather easy, but you are gonna need some programming knowledge. To do this interactively you will need to have some form of communication from the computer to the uC. This requires a program on the uC to accept the commands sent to it by the computer program. If you look up the...
  18. J

    LED circuit longevity

    1. I don't think so, the idea is clearly to prevent too much current. 2. No. The power dissipated by a resistor is the voltage across it times the current through it. The more power being dissipated the bigger the power rating of the resistor to make sure it doesn't release smoke.
  19. J

    How do I use this megger tester?

    I will have to actually get it out and try it now. Supposedly this is the "meg" model, which according to that pamphlet will produce 500V. Neat little piece of american electrical history.
  20. J

    How do I use this megger tester?

    So I found this contraption in my grandfathers old belongings. It has some stuff on there about insulation resistance. If I understand this correctly, it is used to test like the windings in a motor or maybe even a transformer? The thing is old, so it even has a crank on it to produce the high...
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