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  1. MP1

    Question about Ground Loops

    This is also true of a tower with a multitude of meteorological equipment out in the elements... Or a weather station in the middle of nowhere...all the way down to a monitoring station in a populated city. Not just small equipment. The star grounding is no insurance. Corrosion will find it's...
  2. MP1

    Question about Ground Loops

  3. MP1

    RS232 to keyboard converter

    sounds like you just need a hex to ascii conversion. MP
  4. MP1

    Electronic Stethoscope

    Ante, I think amplification and filtering is "How" it works. Perhaps you are correct that he is looking for the theory behind the circuit or a more in-depth explanation of how op-amps work. What I think is pretty clear is that he has already read the description and still came here to ask how...
  5. MP1

    circuit schematic help

    There is no reason to shield a ground wire. Just shield the signal wires. The cpaacitors are non polarized. You will see them with a half circle or two straight lines. The polarized caps will have a plus symbol on the positive side of the symbol. Very small bypass caps will not be polarized. You...
  6. MP1

    schematic to pcb software?

    Go to the link at the top of the page titled "Downloads" and look in PCB. You will find a selection of PCB layout programs. MP
  7. MP1

    circuit schematic help

    vcc and vee are your positive and negative supply lines. The down arrows are reference to ground and are usually a mid point between the vcc and vee. The grounds should all be connected together and should have a common point at which the ground is connected to the circuit. The NAND gates...
  8. MP1

    If it does not belong here, it could be deleted

    I have been wasting a lot of time moving posts out of this area. This area is ONLY for Q/A regarding projects in the "Projects" section of this site. MP
  9. MP1

    500W_inveter

    Ren, It is only a square wave inverter. Is this what you wanted to know? Mp
  10. MP1

    Electronic Stethoscope

    Saroona, It is a simple amplifier circuit with a frequency filter. MP
  11. MP1

    clock for ADC

    On the ADC0809, all you need to do is to connect the clock output of a cmos or crystal clock circuit to the pin named CLK. The clock does not have to be made with a crystal. The CLK pin is looking for a pulse train input from a clock circuit. Is this what you wanted to know? MP
  12. MP1

    Working on 7-Seg Up/Down Counter. Bounce problem with push button.

    Yes, as tnk2k has posted, a nice simple debounce circuit. Should take care of it. MP
  13. MP1

    Iron-on PCB's w/ photo paper

    Depends on how much copper is in it. Usually takes a whole year with this process for me. Sometimes even longer. There are etchant recycling systems on the market which cost a lot. They use a similar method but with faster results. They use freezing and heating methods to achieve the same...
  14. MP1

    were can i get a circuit layout program

    Beware that some design software packages will only allow you to send the files to their own board house. Look for a package that gives you the freedom to print the layout and make your own boards or send to your favorite board house. MP
  15. MP1

    Component identity

    If it is a functional circuit, you could measure the output. Attaching a pic would still help. MP
  16. MP1

    speaker to line level

    well, from that quote, it sounds like he wants to learn something about it...i.e.- get into the guts of it. Perhaps adding an additional amp? A speaker output is not a line level output. Don't forget, this is an electronics forum. Members do things like this, decade.  ;) Why would you recommend...
  17. MP1

    electornics and communication

    Blue button at the top of the page that is labelled "Projects". MP
  18. MP1

    electronics

    Look in our projects section and quit repeating this post over and over again. There is a button at the top of the page that will take you there. MP
  19. MP1

    clock for ADC

    What is the part number of the ADC you are using? This information should be in the data sheet. Some ADC chips have internal clock and only need a capacitor and resistor. Others have a pin marked CLK, which requires a clock input. If you cannot find the information in your data sheet, let us...
  20. MP1

    speaker to line level

    So, I understood correctly in the beginning. I still do not see where you think you know his exact specs..unless you are just guessing. I have seen several of these units which are rated at many different outputs. Some are nice ones which far exceed 14W. And, yes, you can get 200W from a car...
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