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  1. MP1

    Hello All

    A good start is to click the link at the top of the page titled "Projects". There are lots of projects in this section which will give you "hands on" experience. Have Fun! MP
  2. MP1

    idea about project in vhdl or microcontroller

    You might consider a green house control system. There are lots of great sensors now on the market that communicate with I2C. You could manage relays to open and close vents and turn on and off heaters. This being dependent upon the temp and/or humidity of the room. You could also consider other...
  3. MP1

    how to eliminate blink when resetting

    I doubt that anyone will understand what you are talking about without a reference or drawing. However, generically speaking, a faster clock speed or faster refresh of the display will work. You want the update to be faster than the eye. I do not know what type of display you are using, but I...
  4. MP1

    0-5V Analog Output from my PC

    Also note that the 4 pin USB port has 5 VDC on pin 1 referenced to pin 4 ground. Pins 2 and 3 are the data lines. This is how you power a USB device. MP
  5. MP1

    0-5V Analog Output from my PC

    Stephen, Here is one way to do it... MP
  6. MP1

    MOVED: pic16f84a

    This topic has been moved to Microcontroller Projects, Programming. http://www.electronics-lab.com/forum/index.php?topic=4501.0
  7. MP1

    Inverter Circuit 12V DC to 230VAC Sine Wave

    audioguru is correct that the topic has changed a bit, but I do not think one can speak of one type of inverter without the others cropping into the discussion. Sasi, if you feel prompted to discuss your design, please feel free to do so. MP
  8. MP1

    Inverter Circuit 12V DC to 230VAC Sine Wave

  9. MP1

    Inverter Circuit 12V DC to 230VAC Sine Wave

    Nura, Would it be possible for you to scan the book into a pdf file or word document to share with the group? Or is this a copyrighted document? In this case, what is the ISBN number so that others can look for this book? Also, I wanted to mention that there are perhaps thousands of variations...
  10. MP1

    Inverter Circuit 12V DC to 230VAC Sine Wave

    Just passing on something that ante posted years ago. Not my design, nor have I made the circuit. If you go back and read the posts, you will see that I was talking about several different methods, but not advising to use any particular one. I think you take posts much too personally...
  11. MP1

    Inverter Circuit 12V DC to 230VAC Sine Wave

    Actually, I have not shown you a design of anything. Is it common for a theory expert to build a complete inverter from a picture of a pulse? Perhaps you did not build it well. MP
  12. MP1

    Someone Plz help me~ Auto Fish Feeder

    Jack, Here is a link that will show you how to control a stepper with a micro. It also has the code, so you should be all set for this part of the design. http://www.avrprojects.net/ But you are not telling much about the rest of it, so it is pretty hard to help further. MP
  13. MP1

    Inverter Circuit 12V DC to 230VAC Sine Wave

    Yeah, even TI would like to pass this chip off as a digital experience. Your PWM controlling signal does not make this a digital project. But go for it. I have seen much worse projects on the web. MP
  14. MP1

    Inverter Circuit 12V DC to 230VAC Sine Wave

    actually class D is a far cry from being digital. It is PWM. Class D uses triangle wave controlled by input signal (sine) to produce a PWM type of controlling signal. I was referring to a constant clocked squarewave controlled by a sinewave to produce varying heights of squarewaves, which when...
  15. MP1

    Iron-on PCB's w/ photo paper

    I actually do the opposite. I put the ferric chloride in sealed plastic containers and let it sit in my exterior shed for the season when it is spent. The change in temperatures causes it to separate. Then I pour the clean etchant off the top and re-use it. MP
  16. MP1

    MOVED: EAGLE layout Error

    This topic has been moved to Spice Simulation - PCB design. http://www.electronics-lab.com/forum/index.php?topic=4424.0
  17. MP1

    Inverter Circuit 12V DC to 230VAC Sine Wave

    Another form of sinewave conversion and a much more effective way to do this is to use a micro to generate varying levels of square waves which are very close together in timing and which, when smoothed with a capacitor, will become a sine wave. This will give you the efficiency of a square wave...
  18. MP1

    Inverter Circuit 12V DC to 230VAC Sine Wave

    That thread is actually a re-make of the project and not a correction. There were not many problems in it. Some traces were connected where they should not be and the decimals were off in the clock components. Either way, you have a square wave. Using a linear amp for a sine wave will waste too...
  19. MP1

    Multiple Switching Help!

    I would use a micro and connect momentary push button switches to the port pins. It would be a simple matter of reading the port and opening and/or closing any multiples of switches from this information. For example, we would be looking for a 0, 1, 2, 4, 8, 16, 32, etc on the port and opening...
  20. MP1

    query abt plant watering watcher I

    Hi meshal, Glad to hear that you have had success with this circuit. Others have also built this circuit with no problems. I am only curious if you used the Motorola chip or another manufactirer's chip. There was some controversy about different results being dependent upon this chip. Thanks for...
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