Search results

  1. MP1

    PCB Etching Tank - Do it yourself

    Electronic parts are much smaller than they were at the dawn of time. There are new requirements to make traces much closer and the parts have all gotten smaller. If you etch one of the newer footprints for one of the surface mount chips with closely spaced pins in a cold bath that will take an...
  2. MP1

    Printing negatives from Eagle.

    I do not use press and peel. I use presensitized positive photo etch boards and image them from a transparency which can be made from any laser or inkjet printer which has a high resolution. I use a 1200 dpi printer for the transparency. MP
  3. MP1

    Led display digital voltmeter kit?

    Hello Linker, This kit is not available through this website. This site does not sell kits. The project is a reprint of a "Smart Kit. This is their kit # 1137. You can purchase it here: http://www.smartkit.gr/details2.php?lang=2&wh=6&searchttile=digital%20voltmeter&thepid=108...
  4. MP1

    pressure sensor

    Will something like this work? http://www.tekscan.com/flexiforce/specs_flexiforce.html MP
  5. MP1

    A Project with a puzzle

    Put reflective material on the bottom side of the top of the needle and use reflective opto sensors instead of breaking the light. Then the sensor will only trigger on the correct half of the compass needle since it is the reflection back to the sensor that is used as your trigger media. Hope...
  6. MP1

    Simple dB meter driver circuit.

    Shamim, I do not think you will find one simpler than the design with diodes that RDL posted. Still, with this one you do not have very good accuracy. MP
  7. MP1

    Simple dB meter driver circuit.

    Ooops! Sorry about that Shamim. I attached the wrong drawing when posting. Thanks to RDL2004, it looks like you have what you are looking for. It is still simpler than the one I meant to post. Best of luck with your project! MP
  8. MP1

    Simple dB meter driver circuit.

    Shamim, Are you looking for something like this? (click on the picture to enlarge it.) MP
  9. MP1

    0-30 Vdc Stabilized Power Supply

    Wow...let's just gang up on the guy.  ::) I think if he is happy with the power supply that he built, he doesn't owe anyone test results. Just a note to the community that he is satisfied with the project. Admin of this site also built the original and it did not cause such problems as burning...
  10. MP1

    car battery tester

    You need to read up on how comparators work. Breadboard this chip and get out your calculator. Then this can be a learning experience for you. You will be surprised at how easy it is once you get into it. MP
  11. MP1

    car battery tester

    Look at the schematic in the data sheet. R Hi and R Lo determine the end points. As you can see, the chip is based on a series of comparators. MP
  12. MP1

    Are datasheets important?

    Wow...has this gotten off course to the topic. In response to that ...not completing the part of the course which required a mentor is what I was referring to. The course is not complete. As your school would advise, the mentoring is an important part of the coursework to become an Engineer...
  13. MP1

    Printing negatives from Eagle.

    If your printer does not have the capability to print negative, you can export as an image, then use your image editor such as microsoft paint, etc to invert the colors. Make sure the scaling is correct in Eagle for the image file format. It is much better to use a positive photo etch if you...
  14. MP1

    Are datasheets important?

    Walid, Perhaps you have misunderstood the conversation. No one has been disrespectful to audioguru. However, you might not know that audioguru is not an R&D Engineer. In fact, he is not an Engineer. He mentioned in another forum that he did not complete his Engineering course. In regards to...
  15. MP1

    Are datasheets important?

    It is my understanding that the author of the project is an R&D Engineer. I have seen him elsewhere on the web. You are throwing out rumor and speculation instead of fact. (theory?  ;D ) Are you claiming to be an R&D Engineer? You stated what R&D Engineers do, then you started...
  16. MP1

    Are datasheets important?

    Since this topic is about the importance of data sheets, I will add a little to that. Data sheets are very important to get an image of what a product can do and where it has limitations. The data sheets will give you some test results as examples, but one should note these tests are not the...
  17. MP1

    Are datasheets important?

    Sorry, no can do. I have no intentions of redesigning the projects on this site. Don't waste my time. Besides, there are those who have built this project and report it to be working well. That has quite a bit of weight over your claims since you have not built it. MP
  18. MP1

    0-30 Vdc Stabilized Power Supply

    Thanks for the reply Omni. Others have also built the original with success. MP
  19. MP1

    Are datasheets important?

    You are reading too much into the data sheet and not taking the application into consideration. The clock in the inverter circuit works. You have beat this subject to death in another forum. MP
  20. MP1

    0-30 Vdc Stabilized Power Supply

    Did you build the original design or the one with the modified parts list? MP
Top