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Posts posted by gogo2520

  1. Hello gogo2520. I have read that microcontrollers can be programmed in C with compilers adapted for certain microcontrollers. Doesn't that make it easier to create larger and almost as efficient microcontroller programs. I know of other languages that can be used, but they would not be as efficient for programing a microcontroller.

     Depends on the compiler. take High Tecks C compiler used on microchips. You can get a free trial version to try it out but it is not totaly optimizes like the program you buy, so the program you write and compile with the free version is biger(more lines of code) then the optimized version.
    second, the problem with using different C compilers not written for the microcontroller you have is the header files are missing and they just can't be copy and placed in a library because the compiler wouldn't know how to use them.
       most of the programs written for microchips are interperters that use the basic asm commands and the turn it into a more user friendly type language like C or basic. check out great cow basic once its a free compiler and commutity supported.   http://gcbasic.sourceforge.net/ . there all written on top of asm wich is almost machine language
     have fun
  2. thanks for the reply Hero999
      I can see were I was wrong with the 24 volts, but it would still need a logic 5 volts to trigger it right. witch is ok because I need 5volts on the board to drive the rest of the logic chips. I guess I need to read some of the Pminmo help forms to see what they were talking about. Something about that particular mosfet. don't know I guess I will just have to  read on.
      Studing the board as it is was worth the learning experience. But as soon as I figure out how the gates and the flip flops work together I plan on doing the driver a different way. The step motors I am using only need 12 volts at max so I could use a uln2803 for the drivers and I want to have opto isolation too.
              thanks again Hero

  3. Hello
      I recently started a project, making a step motor controler board using IRLZ44 Mosfets (hex Mosfets) to control the power source to the motors. The way I understand them is they are either on or off no inbetween so if I set the circuit fo 12 volts when the mosfet is trigered 12 volts is sent.
      The board I am working on is using 5 volts for logic and 12 volts for the motor. Someware I read in order for the
          hex-mosfets to work the input voltage has to be twice the output voltage, so that would mean I would have to put 24 volts to the board, the step motors are only rated for 12. So back to were I don't know what I am doing.
      this is the board I am working on  http://pminmo.com/3axis/3axis.htm
      thanks for any help you can offer.

  4. Good luck with that, caller Id  or answering machine, if you don't pick up the phone and leave it up for at lest for a minute the caller isn't charged, so when I am around and a auto teller market calls I pick up the phone and sit it on the counter untill the phone starts to beeb. That way the caller is charged for the call. eventualy they will run out of money and stop calling. if everybody did that the auto teller marketers would stop.

  5. hello Iwilliams
    There is a couple of spinning led displays on the net here is one

    I would use only 7 leds instead of 8 because of bcd to 7 segment conversion is much easier http://www.ece.mtu.edu/ee/faculty/gearcher/EElabs/EE2304/pages/week_4_bcd_to_seven_segment.html
    looks like fun, I would help but right now I got three projects going and I would really like to get at lest one done before I start into another one.
    have fun

  6. Hello Gromit
      to bad about the carbon paper not working,I was going to try it myself, but what you said after your test I think I will pass and avoid the mess.
      When I clean my boards I use a green scrub pad with some kitchen scrub powder. then whipe it with a little acid tone to remove any grease .
      I have a laminator but rather use a cloths Iron instead. the laminator doesn't seen to work as good. the only problem with the cloths iron is pressing to hard with it, the traces can flat en out and fill out gaps were you don't them filled.
      I don't know what you mean by gummed paper or not sure what it is. like I said before I use office gloss paper it has a clay finish on it to help smooth it or the ink out so its has that gloss photo finish. When I  am ready to remove the paper all I have to do is soak it in warm water for a few minutes an the paper almost falls off. but ya I can still see some fibers of the paper still hanging on to the toner.

    to bad about the carbon paper
                          have fun

  7. hello alexan_sim

    here is a site thats has been around for awhile that will get you started http://www.allaboutcircuits.com/

    hands on is the best way to learn, and its a never ending lession. new stuff comes out all the time.
      have fun

  8. I have been using the toner method for years  with no problems. I tried the TRF white, thought it would be nice to have a pretty silk screen but I couldn't get it to transfer right.  I tried a landury iron, and a laminator. neither would work right. I guess it all depends on the amount of toner that is used. If the toner is to thin the TRFwon't stick to it. Oh well it was just a test, my boards look fine with just black silk screenning.
           If I every got real serious about silkscreening I would invest in the real silkscreen set-up and not waste my money on TRF junk

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