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  1. MP1

    help for a noob

    Your easiest solution is to use  microcontroller. Although this sounds like a big step, it really is not for such a feat. You can even use basic to program the chip. One inexpensive solution is to use an ATMEL chip (around $7) and the free version of BASCOM AVR program. You do not need a...
  2. MP1

    500W 12v to 220v Inverter

    The one now on the site is designed just like any other square wave inverter. The one you built is designed just like an audio amplifier with heat generating resistors to ground. Something you would expect to be designed by a stereo technician or audiophile. It consumes way too much energy from...
  3. MP1

    High Power LED Mood Lamp

    Yes, current. You totally don't understand this, do you? Never mind. MP
  4. MP1

    help for a noob

    You are right. It will step 1 through 4...unless you change the direction bit. This is what I though you were looking to build. MP
  5. MP1

    500W 12v to 220v Inverter

    Photoar, I got several complaints about the circuit you built. It is built like an audio amplifier and does not apply the same rules as all other square wave inverters. Other members have gotten better results by removing some of the power robbing and heat generating parts, making it more like...
  6. MP1

    High Power LED Mood Lamp

    This is not a steady DC voltage. It is a pulsed voltage. It is calculated differently. Your output is a factor of the on state vs the off state. MP
  7. MP1

    help for a noob

    If I understood your original post correctly, you are wanting a device that will send out gray code to a set of LEDs. Gray code is what you send to a stepper motor in half step mode. It looks a lot like binary code. Each time you have a pulse to the stepper controller, you step to the next...
  8. MP1

    Please provide "Art-Work" or PCB Design Software.

    I am certainly a member of that club.   ;D MP
  9. MP1

    Please provide "Art-Work" or PCB Design Software.

    Try the link in my post above. These are the most popular ones for the hobbyists. MP
  10. MP1

    LM317 Variable power supply

    x_dadu, You do not need more than one LM317 to do this. You can use your LM317 regulator to excite the base of a power transistor. This will allow you more current from your power supply. If you need more current than what this allows, you can certainly parallel the power transistors as long as...
  11. MP1

    Please provide "Art-Work" or PCB Design Software.

    Actually, the newer cad programs are way beyond that. With error reporting, air wires, erc, drc and netlists, those of us who started with tape on vellum are seeing a completely new world. You don't have to know how to manually route a board any more. At least not for a hobbyist board. Just...
  12. MP1

    Please provide "Art-Work" or PCB Design Software.

    Eagle is a pretty popular choice. It has an auto router built into it. There is a free version for hobbyists and student use. It won't expire and it is only limited to board size and number of pages for a schematic. Here is a link on our site to various PCB software packages including Eagle...
  13. MP1

    where is my post

    I have removed at least two posts from you in the Projects Q/A forum. Here are some guidelines that will help: 1. Post in the appropriate forums. (Projects Q/A is reserved for discussion of projects that are in the Project section of this site.) 2. Post in English. (Your post in another...
  14. MP1

    Help with circuit for custom guitar amp switching

    I'm a little confused here again on your description. Where are the momentaries and where are the constants? If which two contacts are shorted, where does it cause a constant connection? Are you saying, for example, that the pedal makes a momentary short on the yellow to orange or are you saying...
  15. MP1

    Question: Can computer burn your house down?

    My computer is a server. It has not been turned off since the day it was installed. No problems. MP
  16. MP1

    Help with circuit for custom guitar amp switching

    I wouldn't want to make any guesses since I do not know what is on the other side of the plug. In other words, without seeing the schematic of how this is wired up in the amp, there are too many variables. With a schematic, you could make a very elaborate switching control. If you just want a...
  17. MP1

    Help with circuit for custom guitar amp switching

    Can you give a better explanation of the circuit? What is on the unconnected pins of the round plugs? What signal is on the different colors of wire? Which two pins of the round plugs are shorted when you connect a foot switch and switch it on? MP
  18. MP1

    Electronic Stethoscope

    subodhthok, I think you are looking for this project: http://www.web-ee.com/Schematics/HeMon/HeMon.htm MP
  19. MP1

    help for a noob

    Tony, I suggest you go through the projects in our projects section to see if there are some elements that can be put together to achieve what you are wanting to do. At the top of the page, you will see a blue button (link) named projects. Click on it and it takes you to an impressive sized...
  20. MP1

    CB receiver

    It looks like a problem with a translator. Click on the author's name in the project. This will link you to him directly by email. Then you can inform him of the problem. Then he will know he should re-send a corrected version to the site. Thank you, MP
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