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  1. MP1

    electronic wizkid needed!

    Not really a good idea, but if you do this, you will need to clean the board with alcohol, flux all parts that you will heat, then clean all the flux off the board when finished and apply a conformal coating to the board to re-seal all of the solder connections so they do not corrode. MP
  2. MP1

    electronic wizkid needed!

    How much charge did it provide? Full battery for a reasonable lifespan? Sometimes AC pulses will give you what looks like a revived charge circuit. You can sometimes bring a dead battery back to life by pulsing the charge voltage to it. If the battery only took a little more charge, it is...
  3. MP1

    Led display Digital Voltmeter question

    Don't stare at it too long....  ;D As I understand it, the dots will start to connect. MP
  4. MP1

    Car Alarm

    just curious why you chose transistors for a car alarm instead of digital gates, like OR gates and AND gates to make some logical choices of when and why an alarm is set. MP
  5. MP1

    Led display Digital Voltmeter question

    It's a double sided board. I think you are trying to mount them on the wrong side. MP
  6. MP1

    Inverter Generator

    acdc, Is there a chance that this unit has a schematic attached inside that you could scan and post? It would be much more helpful to see how it is already setup. As ante has mentioned, there are too many parameters to be able to give a "one size fits all" type of answer. MP
  7. MP1

    IC problem

    You cannot measure continuity through the RS232 driver circuit. You will need to follow the pulse stream and see where it ends. MP
  8. MP1

    3-Axis Stepper Controller

    I run mine on Win98. Also, I use an old computer power suply for the power source. I felt there was no point in re-inventing the wheel since I had a few old computers sitting around not in use. What software will you use? I wrote an X,Y type program that I can use for making my own drill files...
  9. MP1

    USB to LPT Adaptors

    Even easier....you get the PCMCIA card for it. MP
  10. MP1

    Help Needed

    Your usb port is most likely part of the mobile phone circuitry. I doubt that the cable will be much more than two data lines and voltage + and -. Is there circuitry in your cable? Without a pinout of the cable or more information on the phone, I can only make a guess. MP
  11. MP1

    6vac Transformer design question

    Here is a link that might be helpful: http://geek.scorpiorising.ca/windingtransformers.html MP
  12. MP1

    USB to LPT Adaptors

    I would spend my 10 to 12 dollars on an LPT card for the computer. USB adapters are ok, but they rely on a virtual port built in the software on the PC. These ports do not come on inexpensive computers because computer manufacturers think we only use this port for printers. It is a cost cutting...
  13. MP1

    Shrinking heat-shrink sleeves

    Heat shrink tubing is pretty robust. You can actually touch it to the solder iron without harm so long as you are not touching it for long. However, this method makes for some pretty ugly wires. The solder iron tends to discolor and melt the outer surface of the tubing.
  14. MP1

    Help Needed

    There seems to be a misconception that serial to USB conversion is just an added circuit to the comm port. You need to completely change the signal and add drivers to the PC to make a virtual comm port for the new signal to run on. Here is a link that will help get you going. You will find the...
  15. MP1

    Difficulty finding a page within a single thread

    Hopefully all can figure it out now that the instruction is out there. There are also the numbers at the top of the message boxes, but that only allows you to go back a few pages at a time. Also, when you browse around and want a quick bookmark to a thread you will want to come back to, you can...
  16. MP1

    MOVED: solar light

    This topic has been moved to Electronic Projects Design/Ideas. http://www.electronics-lab.com/forum/index.php?topic=7335.0
  17. MP1

    Difficulty finding a page within a single thread

    Why do we need a fix for this? There are a fixed number of messages per page. In the address bar above, see where it ends with .../index.php?topic=6816.0.... This means you are on the first page. For the second, it would end with ../index.php?topic=6816.14...for the third page...
  18. MP1

    Led display Digital Voltmeter question

    additional posts regarding theory discussion has been moved to the Theory forum. We were getting a little off-subject here. Thanks, MP
  19. MP1

    Led display Digital Voltmeter question

    Sure. I just get tired of the scare tactics to newbies....you will fry this if you don't follow my instruction....etc.. but then I get emails from those who have built the originals with no problems, grumbling about what they feel is a false posting on this forum. Projects Q/A is primarily for...
  20. MP1

    Led display Digital Voltmeter question

    There is no guarantee on any schematic you find on the Internet. That is why there is a discussion area for Q/A of the projects in our project section. Most projects which have a substantial conversation thread will also have a link from the project page. The Eagle version is ok. Also, I am...
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