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  1. MP1

    Homemade capacitor

    There is another thread somewhere on this site where there was a discussion on making your own capacitors. Some links were also posted. You might want to search for that thread and continue in the discussion. MP
  2. MP1

    Cold Heat Soldering Tool

    I have been trying out this device to see what comments I could add about it. I only have the larger tip, so I cannot get into the tight spots with mine, but it looks like the tip touching the solder or copper completes a connection and causes the tip to get hot like a little welder. Then when...
  3. MP1

    LM317 Variable power supply

    Well, like I said....I did not think that you would get much out of it..... and I think your original comment was that it could not be done at all? You seem to be changing as we go on. More voltage is not needed to allow for ripple rejection. As I said earlier, the added voltage only goes to...
  4. MP1

    LM317 Variable power supply

    audioguru, you seem to be agitated. I design products for the real world, not as a hobbyist, so I can tell you that proven application backs up what I have told you. I see this attitude a lot in the hobbyist world. A guy wants to make sure he will get all the current he needs for a project, so...
  5. MP1

    File types and sizes

    I have also experienced the "file already exists" message. Just like you, I change the name of the file and load it again. I have not seen the faulty jumps to the wrong thread. However, when there are several messages posted to a thread since I have been there and I press the "new" button, I am...
  6. MP1

    LM317 Variable power supply

    Nice attempt at math, audioguru. (and before you say it, NO, I do not disagree with the manufacturer's data sheet) This is what I refer to in my post about crappy design techniques. I can get a half amp out of this regulator easy without a heat sink. (and using the manufacturer's design...
  7. MP1

    File types and sizes

    Sorry ante, I could not resist. I have not had a problen posting these file types, but I have not tried such a large file size. Perhaps it is due to the size of hte file. Mixos? Do you know the answer to the question? MP
  8. MP1

    LM317 Variable power supply

    To dispell any myths, I use the LM317 a lot. I am refering to the TO-220 package. I have not had problems overcoming ripple or heat. Only in extreme designs would you even need a heat sink. If you are having problems with this regulator in a design, look at the data sheet and see if you have the...
  9. MP1

    0-30 Vdc Stabilized Power Supply

    Ante, you are 100% correct. Thanks for the article link. It was good reading. MP
  10. MP1

    File types and sizes

    Yes, I am reading the feedback/comments. ;D MP
  11. MP1

    Convert Current

    Ante, I recall it was not so long ago that one could not find a 9 volt regulator. We used to use these with a diode on the center pin to lift it enough to power a 9 volt circuit. Just thought I would add this advise. When tweaking on a standard value regulator for a non standard value, you can...
  12. MP1

    Database of electronic parts

    You will spend additional time keeping up your inventory. Someone has to add and subtract from the list everytime you pull a part from the bin and use it, or put a new one in the bin. Otherwise it will do you no good. Is it worth it? :-\ MP
  13. MP1

    Dose your LCD rolls?

    suraj, have you tried 0.01 uf? This is a high frequency ripple problem. The larger the cap, the lower the frequency. Another thing to check is did you ground the unused pins of the display? Also try adding a small cap across the 5 volt buss on the display as close to the chips on it as possible...
  14. MP1

    stepper motor controller ucn5804

    Also, look in our projects section. There is a project there which uses this IC. This IC is only capable of 1.5A MAX. It is normal to see heat generate from this IC in operation. However, if you draw too much current it will not last long. You can use the pins of this IC to turn on transistors...
  15. MP1

    Rechargerable Battery detector...

    sseraphh, Look for information regarding comparators. A 'window" comparator will do what you want. MP
  16. MP1

    Convert 0-30V 3A PSU to 5A or more

    onsemi sends out samples through their online request form. MP
  17. MP1

    Question about ttl IC

    ::) MP
  18. MP1

    LM317 Variable power supply

    Some notes on ripple: If you have power supply ripple getting past the regulator, you should increase the "input" side cap, not the output side. The output side of a reg should already be a very low impedance, and adding caps to it beyond that needed to suppress HF noise should not be...
  19. MP1

    wireless webcam

    Here arwe also some links for wireless webcam: http://www.x10.com/home/offer.cgi?!XRAY1,../overture14b.htm?>wrlsswebcam:0.40 http://shopper-overture.search.com/search?qt=wireless+webcams&subj=wireless_webcams&part=overture-cnet&tag=236002...
  20. MP1

    My computer is slowing down!!

    Rhonn, If you try out lots of software and then remove it you should note that every one of these adds to your registry. After a while, your registry gets bigger and bigger. Your computer has to read the registry at start up. Since most users cannot go into the registry and make changes due to...
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