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  1. MP1

    Night rider scanner

    I would tend to agree with LDanielRosa. A microprocessor would be a good way to go. As far as this not being original: Obviously a statement from one who does not program. That would be like saying that there are a lot of op amp circuits, so using one in a new design is not original. The code...
  2. MP1

    Re:Transistors discussion

    You seem to give yourself quite a lot of credit. I find it hard to believe. Perhaps you could get a job with Phillips and teach them a few things... ::) MP
  3. MP1

    Power supply for AMP in CAR

    closer than what you might think ante. What you have stated is approximately what I was saying but in a different way. I have not had much use for square wave inverters in the past. Linear is quite different as I have found on my bench, though. And of course, the sinewave inverters are a little...
  4. MP1

    Night rider scanner

    yes, audioguru, could you post an original design for others to view? MP
  5. MP1

    Project Help

    I thought jpg were the smallest package because of compression? Not so? MP
  6. MP1

    Transformerless power supply

    It is as LDanielRosa has said, but allow me to add some comments since this is an International forum. Where to put the fuse depends upon the mains. Usually, the mains will have a hot lead or leads and the other is considered common. For example in the US and Japan 120 VAC and 100 VAC, the black...
  7. MP1

    Power supply for AMP in CAR

    ante, I have been researching this question since you and I had several discussions on the matter some time ago. You will have to have "some" resistance. You cannot have a direct short in an AC or DC circuit without ending up with a problem. However, what I have found is that these circuits are...
  8. MP1

    "Power?" Inverter

    Ante, You make a very good point. One that is not observed very often. When dealing with power inverters, a lot depends upon the transformer at the output. In Aaron Cakes original article, he spoke about using a microwave transformer and re-winding it. Anyone who went to Radio Shack to get a...
  9. MP1

    Open Circuit Test

    Siddarth, I am sure there is a tool in existence like what you have described. Yes, this battery/LED circuit would just be a basic continuity tester for one leg of a non powered circuit. There are a lot of variables one would have to consider to go beyond that. Interesting, though. MP
  10. MP1

    How do I make a dc circuit auto-off after 60 minutes

    Ulman, there is an excellent 555 timer tutorial here: http://www.meridianelectronics.ca/gadgets/555/555.html Here is one of the examples, a 10 minute timer. Hope this is helpful to give you some ideas. MP
  11. MP1

    Night rider scanner

    Nettron, thanks for sharing. ;) Do you have a picture of the prototype? I think others would be intrerested to see it as well if you do. MP
  12. MP1

    cable route detector

    The metal detector approach will tell you there is a wire there, but it will also tell you there is a nail or a water pipe there. It will not tell you what the current of the wire is. For this, you will need an inductance meter circuit. MP
  13. MP1

    HELP ? ATX PSU LEADS

    audioguru, this is not rocket science. This is the same method used by even the car industry since Henry Ford was building cars. For example, if you are building a hot rod and you have to move the battery from the front of the car to the trunk, you use a larger cable. You do not go out and buy a...
  14. MP1

    Open Circuit Test

    sure, then it only becomes a matter of money ;) With unlimited funds, anything can be produced. The circuit would be much more complex and unneeded for most applications and out of budget for most hobbyists. MP
  15. MP1

    cable route detector

    This subject was discussed briefly last December here: http://www.electronics-lab.com/forum/index.php?board=13;action=display;threadid=125 I posted a simple schematic. You would need to add some type of meter to the circuit. As drawn, it will only detect. MP
  16. MP1

    My 120 Watts Power Inverter

    The resolution seems fine. When you click on it you get a larger picture. MP
  17. MP1

    SK7804

    Hotwaterwizard, Is there a particular program or website where you have had better luck than others for finding data sheets? MP
  18. MP1

    HELP ? ATX PSU LEADS

    It is ok to disagree. But that is not what I said. As I look at my last post, I agree it is not real clear, nor was it worded in a way to get the meaning across. What I said was that the circuit would "require" more current. Thus he would want a PSU rated at higher watts. Added was my suggestion...
  19. MP1

    My 120 Watts Power Inverter

    Kasamiko, If you can put the bmp format in a zip file or e-mail it to me, I can retrieve it and reformat the size. I do not have express schematic on my pc. MP
  20. MP1

    "Power?" Inverter

    please restrict comments to positive comments on how to make this work. The author claimed on his forum that it worked for him. MP
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