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  1. MP1

    MOVED: PIC16C84 -> LED

    This topic has been moved to Microcontroller Projects, Programming. It is a microcontroller question. Please follow the link below to go to this topic. http://www.electronics-lab.com/forum/index.php?topic=5599.0
  2. MP1

    Breath Alcohol Tester controlling car ignition

    privas, He is building one, not modifying one. It is a project. deolah, The only gas sensors I am familiar with are the Figaro ones. You can get data sheets and find distributors on their website at www.figarosensor.com Hope this gets you started. MP
  3. MP1

    BIG BROTHER!

    Search for X10 cameras. This might give you a start or some ideas. MP
  4. MP1

    6 or 7KW Inverter Needed

  5. MP1

    7447, 7448 decoders

    Read the data sheet: MP (BTW: I am pretty sure your display is common anode)
  6. MP1

    locking system

    You said it is your senior project. Don't you think you should be graded on your efforts and not on ours? MP
  7. MP1

    TRIACS-need basic working explanation

    There is an example of two types of triacs connected as a light control if you scroll about half way down the page here: http://www.nutchip.com/connect/connect_en.htm Hope it helps you. MP
  8. MP1

    Led display Digital Voltmeter question

    Did you substitute any of the parts? Did you change any of the values or omit any of the parts? Is the voltage you are reading a true DC voltage (clean?). Do you have access to a scope? You should look at the regulated voltage to the chip, the reference pins and also at the voltage you are...
  9. MP1

    MOVED: Battery Charger Conversion

    This topic has been moved to Circuit/General Requests. It was posted in the wrong place http://www.electronics-lab.com/forum/index.php?topic=5562.0
  10. MP1

    Transformer replacement

    Does it have a schematic inside it? That is the one thing I really liked about the older equipment. They almost always glued a schematic inside the box so you could fix it someday. If you have one, you could scan it in. A forum member might be able to tell you where to check for voltages, what...
  11. MP1

    locking system

    Aren't you supposed to design this? MP
  12. MP1

    making a circuit grounded

    The two plugs coming from your computer power supply that connect to the motherboard have a 2 black wires on each plug which are next to each other when plugged onto the motherboard. These are common and will give you the best connection to power supply common if this is what you are looking...
  13. MP1

    Electronic Stethoscope

    To All: Keep the posts on topic so that they will remain. If you want to discuss anything else, start a new topic or if it has nothing to do with a project on this site, send someone a Private Message. I think I have made it very clear over the years why posts will be deleted here. MP
  14. MP1

    Led display Digital Voltmeter question

    Which project did you build? Can you post a link? There are two different projects. One does not show the needed bypass capacitors for the voltage supply. What are you using for a 5 volt source? This device depends upon a filtered voltage supply. Especially the reference voltage. Also, if you...
  15. MP1

    could anyone please help me to answer some questions

    Second post? Didn't I see this same post in a forum I moderate? Asking us to do your homework? MP
  16. MP1

    Some kind of RPM counter

    Perhaps this will help: http://www.shumatech.com/dro-350/add-ons.htm or this: http://electronickits.com/kit/complete/meas/vek2625.pdf or here: http://www.4crawler.com/Diesel/CheapTricks/Tachometer/index.shtml or a combination of them. Hope this helps. MP
  17. MP1

    could anyone please help me to answer some questions

    Please do not ask us to do your homework for you. MP
  18. MP1

    230V AC to 12V DC @90 AMP

    You should post a copy of your schematic diagram so that members of the forum can comment on what might be changed. MP
  19. MP1

    Transformer and LM317 Question

    I recommend that you add the capacitor. You do not want the resistive load example in this application. MP
  20. MP1

    Electronic Stethoscope

    I have removed posts in this thread indicating the site has posted projects to confuse people. The original stethoscope project is still on this site because I have gotten feedback from members stating they have made the project and it worked. MP
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