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  1. J

    What is the output voltage in this circuit?

    I take it from the wording of the question that if you can figure out the current you can find the voltage. I would also assume that since you have a AC voltage source the values would need to be that of rms. I checked it out in the simulator and I don't understand it. simulator says the Vrms =...
  2. J

    What is the output voltage in this circuit?

    ok, I am really confused, so what is the voltage at point A in reference to ground? A sine wave of what magnitude? These multiple voltage sources really screw me up.
  3. J

    What is the output voltage in this circuit?

    Would it not be anywhere from 0 - 1V in reference to ground?
  4. J

    10 watt LED

    I always found it much easier to dig up a busted water line and patch it back together then trying to analysis an electronic circuit. to each his own I guess.
  5. J

    Is it possible to connect amplifier to a computer?

    Ah yes, floating ground. I still don't understand why they do that, 2 prong instead of just using all 3 prong plugs. Other then cost, it just seems like a smart option. Does anyone know what the UL standard is for a device to carry a 2 prong plug over a 3 prong plug. I thought one rule was...
  6. J

    For Sale: Resistor Assortment Kit, 980Pcs 1/4W 1% Metal Film, 49 values

    damn it, why did I not see this listing yesterday. ah well snooze you lose
  7. J

    Is it possible to connect amplifier to a computer?

    You mean like the Ground in the breaker box? I did this once with my computer in one part of my house to an amplifier on the other side of the house 40 foot away on separate power circuits. I didn't have any ground humming issues. Or at the very least they where not noticeable.
  8. J

    what happens if emitter-base & base-collector junctions are forward biased with 0.7V?

    From his other thread I do not think he was asking the question as you have understood it. Can both junctions be forward biased, possibly but will it work like a typical transistor, I doubt it. Far as I know he was looking to understand how a transistor is supposed to work. Not how you can...
  9. J

    LDR

    From the look of the switch it is quite simple, the middle pin will be shorted to either outside pin depending on the position of the switch. Get out your digi MM and do a continuity test if you are unsure of how it works. That type of switch should have three positions. Up/Dn/Middle or...
  10. J

    sony xplod amplifier repair problems

    You can't possibly expect anyone here to give you advice with that horrible unfocused picture.
  11. J

    4017 Decade counter

    http://lmgtfy.com/?q=square+wave+pulse+generator+circuit crystal oscillators etc. Anything that will provide a square wave to the clock input of the 4017 will suffice.
  12. J

    4017 Decade counter

    No, re-read what I said and what steve said. YOU MUST HAVE A CLOCK PULSE for the 4017 to work, but a 555 is most certainly not the only way to provide a clock pulse. edit: I ain't sure how to take your comment. But the 4017 needs a clock pulse as steve said. Sorry if I misinterpreted what you meant
  13. J

    LDR

    All you gotta do is put the red wire on the empty terminal. OFF I presume is in the middle, so when the switch is to either side it will short that side pin and the middle together.
  14. J

    solar tracker without relay?

    My first assumption was the exact same as haralds, why would you not want to use the relays?
  15. J

    LDR

    Is that a two pole switch? Looks like it, since it says 'ON'___'ON'
  16. J

    Audio Amplifier

    one word... Chipamp Then there is always class A, you can only find a million examples using google I would presume.
  17. J

    4017 Decade counter

    absolutely not! But it is probably one of the easiest ways to attached a clock pulse.
  18. J

    12v dc wireless dimmer to wall switch?

    Yep you are correct. without some serious circuit modifications this will absolutely not work. So please don't try it. You have two issues, 1. you need DC current, so you will need to rectify the incoming voltage and use a step-down transformer to get the appropriate voltage. 2. Figure out a...
  19. J

    4017 Decade counter

    Yes and if you think about this a little more that would mean the pin is connected to the ground through a resistor that would be acting like a pull-down resistor.
  20. J

    4017 Decade counter

    It is an RC circuit, when first powered on the capacitor will look like a short and so the reset pin will be held high until the capacitor charges up and then it will be low. Google RC circuit if you want to learn more. With no certainty I would assume it is meant to wait for the 555 output to...
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