Search results

  1. MP1

    Need some help with AC digital ammeters and volt meters..

    Here are some tips from an old Custom FX designer: Some effects pedals use 9 volt with center hot and some use 9 volt with center common. Other effects use different voltages such as 15, 18, or 24. You will need to know a little about what you have before continuing. Also, a common connection...
  2. MP1

    MOVED: write arabic in lcd

    I have moved this topic to  Microcontroller Projects, Programming. It is a microcontroller project. Please follow the link below if you are interested in it.    MP http://www.electronics-lab.com/forum/index.php?topic=5799.0
  3. MP1

    about mixer

    Actually, I invite multiple posts if the person is not happy with the first reply or wants to see what others will answer. Some members do not frequent all areas and would have missed the post. It gives others a chance to comment. (besides, in my opinion, this is a circuit request and was posted...
  4. MP1

    0-30 Vdc Stabilized Power Supply

    ...sorry to inform you, but you cannot have 0V at 3A. You must have voltage to have current... MP
  5. MP1

    0-30 Vdc Stabilized Power Supply

    Read the posts BTW- Multiple pages of conversation does not mean there are a lot of mistakes in a project. It means the project is a popular one. Try reading some of the posts before jumping in with a comment like that. Others have built the project in it's original form and only report that it...
  6. MP1

    Led display Digital Voltmeter question

    For such a high voltage, I would recommend to use a step down transformer and then a rectifier. You can then adjust the error in the reference or use an op-amp on the input to offset the error. MP
  7. MP1

    High Voltage Stun Gun !

    Others such as BY133 and P513 can also be used. 1N4007 is rated for 1000 volts / 1 Amp. If you substitute, you should use the same or better. MP
  8. MP1

    Led display Digital Voltmeter question

    Can you post your modified circuit? MP
  9. MP1

    Small Cap between OpAmp Input Pins?

    It is common to pick up a nearby radio station in tone circuits. 8 to 15pf is commonly used. MP
  10. MP1

    0-30 Vdc Stabilized Power Supply

  11. MP1

    Led display Digital Voltmeter question

    The project in your link is not measuring the same voltage which is supplying the unit. It is measuring a simple transistor used as a temp sensor. The earlier post about measuring the voltage that you are using for a supply was a reply to a member who wanted to actually measure a varying supply...
  12. MP1

    Automatic washing machine with micro-controller

    Most newer washing machines already have microcontrollers in use. Please tell us what you want the micros in your machine to do. MP
  13. MP1

    quick question

    filespace, There are lots of ways to do this, but you must know the voltage and current of the items you are switching. Two other ways to do this are with transistors and solid state relays. If you can post more information regarding the circuit, other suggestions can be made. MP
  14. MP1

    Digital down Converter

    Please post a link to the project and let us know what is your question about it. MP
  15. MP1

    0-30 Vdc Stabilized Power Supply

    Not sure if that was directed at me or the others, but I should point out that any project posted on the web can have improvements made to it. As I said earlier, when a guy builds the project and it does everything he needs it to do - it is a success. No matter that it does not meet it's best...
  16. MP1

    0-30 Vdc Stabilized Power Supply

    I do not see it as a nono. It has uses for many. This is more to do with application than fault. I will take a member's comments for face value. If he says he built a project and it does everything he wants or says it "works perfectly" for him, then who are we to differ? Especially difference...
  17. MP1

    Led display Digital Voltmeter question

    ...Like I said, I am not sure if this is the one or not. There are two Digital Voltmeter projects in our projects section. One was corrected and the corrections were posted in the projects area by mixos. It is possible this one also has some problems but the other one was corrected only. If you...
  18. MP1

    0-30 Vdc Stabilized Power Supply

    So you are saying he is a liar or just stupid? I have to take his comments for face value. When he says it works perfectly for him, I have no doubt. I think your comments are rather arrogant in this regard. Especially since I doubt you have even built it. MP
  19. MP1

    0-30 Vdc Stabilized Power Supply

    Hmmm....Interesting.    57 pages of posts regarding changes needed for this project and a guy posts that his original circuit is working fine except when he shorted it out. MP
  20. MP1

    Led display Digital Voltmeter question

    Go back to page 1 of this thread and read all of the posts. There were changes made and since there are two different schematics on the site, I am not sure which one was corrected. Click on the links posted. Read the posts and make changes accordingly. MP
Top