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  1. CDRIVE

    Need Help in mosfet switching strobed LEDs

    It's perplexing how a 3 terminal device can cause such confusion. It may be time for MiZZi to post photos.;) Chris
  2. CDRIVE

    Need Help in mosfet switching strobed LEDs

    You're not the only one lost here. I don't believe for a nanosecond that the FPQ27P06 is actually wired like that. I've taken note that some, maybe all of the datasheets present the PCH schematic symbol inverted. IE Source on the top Drain on the bottom. The SparkFun link to the FPQ27P06 that...
  3. CDRIVE

    Beginner project

    Steve, you forgot to include making this compatible with one of the harshest environments on earth....blue water. That said I'm struggling to find the "Beginner Project" elements in this. Chris
  4. CDRIVE

    Beginner project

    Beginner project? Chris
  5. CDRIVE

    Importance of low-ESR capacitors in dynamo rectification circuit?

    I wouldn't loose a lot of sleep concerning low ESR in the application that you're describing. The demand for Low ESR diminishes greatly when current demands are low. Chris
  6. CDRIVE

    Need to test some fuses

    Up until about the 70's it would have been that simple. Large high power (wire wound) Pots were easy to find. These days you'd have a better chance of digging up a Tyrannosaurus in your backyard. :D Chris
  7. CDRIVE

    Hand Sanitiser Dispenser Circuit

    Uh ... I'd give better odds on seeing a cow fly! :p Chris
  8. CDRIVE

    A means of closing a JFET switch with a postive voltage?

    I'll go one level further than already stated. I won't operate any component over 90% of manufacturers maximums and for some even less. As for what to do with these 10 chips..? Considering the depth of the work you're already involved in I find it highly unlikely that you're journey into...
  9. CDRIVE

    Microphone Input to Square Wave

    After much thought and consternation I present the attached simulation for perusal. As clearly indicated in the plots there is no AC present anywhere with the exception of VG1. I intentionally designed this with no caps or inductors that could muddle up this discussion. So from this day forward...
  10. CDRIVE

    Microphone Input to Square Wave

    Who would have thought that we'd be debating over a term so basic as AC? I never thought its definition was ambiguous. Chris
  11. CDRIVE

    Microphone Input to Square Wave

    40 years ago, at a lab I worked in, we called generic Y axis scope traces "perturbations". I'd rather use this term over the misnomer AC for instances like this. ;) Chris
  12. CDRIVE

    Microphone Input to Square Wave

    But by definition can that really be termed AC? After all the current only varies in level but doesn't change polarity. Wouldn't "Pulsating DC" be more accurate? Yes... PICKY! :D Chris
  13. CDRIVE

    picaxe noise

    Please post your schematic. Chris
  14. CDRIVE

    Db25 Panel Mount

    Good point Ted but you're a bit late to the party. The panel is now finished, photos posted and we're now at the glowing admiration ("Ooo, Ahh, Nice Work!") stage of this topic. :rolleyes: Chris
  15. CDRIVE

    Electric motor - one rotation then stop

    Bob, you and Colin are taking the fun out of complicating things. :p Chris
  16. CDRIVE

    Rest in Peace, Kris

    Earlier in this thread I said (paraphrase) that we will undoubtedly have many topics pop up that Kris was deeply involved in. Somewhere down the road these threads will bring a smile to our face but I guess that's going to be a very long way off. Here's the most current posting of another member...
  17. CDRIVE

    Induction Heating

    I've watched just about every aluminum smelting youtube video that Xynudu has made. If you get a working induction model working I'll watch your video too! ;) Chris
  18. CDRIVE

    hole for mini golf

    Point well taken Harald, so let's ask him. Lego, do you want to build this from scratch? Keep in mind that we'll provide you with the schematic and parts list but you will be wiring this on a breadboard where you'll have to solder jumper wires from one solder pad to another. On the other hand...
  19. CDRIVE

    hole for mini golf

    Before you purchase components please be aware that we are living in a period that permits purchasing complete modules much cheaper than you can build them from scratch. Ebay is loaded with examples of this. Here's an example of a module that can be used to stretch the LED on time as Dave...
  20. CDRIVE

    Db25 Panel Mount

    Where's the two person, two keys system depicted in all those old nuke launch movies? :D Just kidding. Really nice work! :cool: Chris
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