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  1. MP1

    Volume Control POT. . .

    The original design did not even use a pot. I'll stand by my first comments since I know how this will effect some devices that might be plugged into it. If you can't find the panasonic pots, try the clarostat 585 series. They are available at Newark Electronics ( www.newark.com ) as part...
  2. MP1

    Volume Control POT. . .

    That would depend upon what's in the electronics of what is connected to it...  ::) I would suggest that you use the correct value and just get it from another source like mouser.com or one of the surplus parts houses. When you start changing the resistance of inputs and/or outputs, you...
  3. MP1

    PIC diode tester

    Yes. Try posting your PIC questions in the microcontroller area. You aren't really discussing the diode tester project, so you are in the wrong area. MP
  4. MP1

    Working of invertor - HELP REQUIRED

    Syed, Please check your email. Take care! MP MODERATOR EDIT: The original project has been corrected in the projects section.
  5. MP1

    0-30 Vdc Stabilized Power Supply

    Hello Herman, You will not be able to have a direct conversation with the author of this circuit. The original author is "Smart Kits", but it is a very old kit design and lacks modern principals and newer chips that were offered after the initial design. There are new chips on the market that...
  6. MP1

    DC to AC

    vivek, we do not have a project on this site for such a large consumption. Here is a website that fully documents a 2KVA that has a modified sine wave: http://www.technology.niagarac.on.ca/people/mcsele/i2k.htm This project uses the microcontroller as I had described above, but don't worry if...
  7. MP1

    DC to AC

    AN920: It says a 50% duty cycle is not guaranteed. Period. It does not say that you get a "perfect 50% duty cycle" anywhere....which is what audioguru says the datasheet says. vivek: to get a sinewave inverter, you would use a different technology. You cannot use a sinewave and amplify it like a...
  8. MP1

    DC to AC

    Amazing....since I posted a picture of part of the datasheet. Where did you find the word "perfect"? I performed a search of the pdf and found 0 instances of the word "perfect". I also performed a search for the word "exactly". Also, there are 0 instances of this word. However, I do find a...
  9. MP1

    popular electronics

    In 1982 it became "Computer and Electronics", then went out of print in April 1985. Many of the editors and authors moved to a new magazine named "Electronics Now". Many readers thought that this was just a new name for the magazine since the authors names were familiar. Look for "Electronics...
  10. MP1

    VU meter

    mik3ca, Here is a standard circuit of vu meter that is made with transistors. Hope it helps. MP
  11. MP1

    25W Mosfet audio amplifier

    Have you asked the author of the circuit? http://www.redcircuits.com/ MP
  12. MP1

    DC to AC

    Interesting that you can read that into the data sheet when it is not there... MP
  13. MP1

    DC to AC

    There is nothing in the datasheet that proclaims a "perfect 50-50 duty cycle. In fact, the manufacturer puts a disclaimer in the data sheet that a 50% duty cycle is not guaranteed. Fortunately, for a square wave inverter, you do not need a perfect square wave. You don't even need a perfect 50 hz...
  14. MP1

    DC to AC

    Yes. I thought my answer was pretty clear in that regard. MP
  15. MP1

    Forumla for rectified and filtered voltage

    defaced, Your unloaded output voltage measurement is pretty meaningless. You need to measure the voltage loaded to get an accurate measurement. Also, if you want a well regulated 12 VDC supply, you should use a regulator. Most regulators require an input voltage which is 2 to 3 volts (or more)...
  16. MP1

    Transformer Questions!!! ???

    Tkjas, You seem to have quite an interest in Transformers. Here is a link about winding transformers. It might have some information in it that will prove to be useful to you. http://geek.scorpiorising.ca/windingtransformers.html MP
  17. MP1

    DC to AC

    Many designs use Buffers, many use Inverters (NOT gates) to produce a nice square wave. I have also seen AND and NAND gates used to do this. Digital gates are good for providing a square wave. In fact, many circuit designs employ them to square up other wave forms that are not clean enough for a...
  18. MP1

    Use of LM324 in audio circuit

    I have used the LM324 in many audio applications in the past. For the specifications that you have given, this chip will be fine. It will not give you really great results that you would get with a newer low noise op-amp. But it will give you a descent mixer. Especially at 1 KHZ. MP
  19. MP1

    Dual 741 / 747 modern upgrade

    The purpose of offset null is to compensate inconsistencies inside the op-amp that do not allow it to zero out when it should. It is not intended for the regulation of varying output loads. This is done through impedance and/or amplification methods. Perhaps I did not fully understand your post...
  20. MP1

    need help with electronics coursework!

    Hustla, Welcome to the forum! There is a circuit in the projects section of this site that might get you started, or at least, give you ideas on your own design. You can access the projects on this site with the blue link at the top of the page titled "Projects". Hope this helps get you started. MP
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