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  1. CDRIVE

    Wheel movement sensor / alarm

    Duke, that makes sense. Thanks for the clarification. Chris
  2. CDRIVE

    Wheel movement sensor / alarm

    Duke, yes, when I said relay coil I meant core included less the armature. I'm not really sure that an AC relay core is required but I'm certainly open to all opinions. What is your reasoning for it? On the other hand it certainly won't hurt. ;) Chris
  3. CDRIVE

    Wheel movement sensor / alarm

    A couple of notes here. (1) For your transistor to turn on by simply touching a floating Base junction indicates that your transistor is a very high beta model. (2) Unless you are located in an area devoid of power lines your body is constantly subjected to their radiation, especially within...
  4. CDRIVE

    Wheel movement sensor / alarm

    Did you wind it on an iron core? What AWG is the wire? What's the orientation of the coil to the magnet? Chris
  5. CDRIVE

    Help design analog multiplier to use as AM modulator

    Well I can see that we're talking about a different animal here (Balanced Mixer) and not a classic AM envelope and a totally different application than I thought. That said I would be remiss if I didn't comment that this is sounding more like home work with each post from the OP. Tread with...
  6. CDRIVE

    home powered water pump generator.

    Black is best but I've experienced very hot water from many color garden hoses. We make a point of always draining the hose by opening the nozzle after closing the main valve. If we don't they'll burst. Prior to Hurricanes Francis and Wilma my area had quite a few commercial hot water panels on...
  7. CDRIVE

    Help design analog multiplier to use as AM modulator

    We need more information. What is fo? Is it modulated by voice? Chris
  8. CDRIVE

    Help design analog multiplier to use as AM modulator

    AM prior to the multipliers or non class A (effective) stages will generate copious levels of spurious signals across the RF spectrum. It will not endear you to your governing communications agency either. In the old days, prior to cable and sat TV, it would have your neighbors gunning for you...
  9. CDRIVE

    home powered water pump generator.

    No truer alternative energy statement was ever made. This is how we made hot water for showers in Vietnam and we use it in South Florida too!. ;) Chris
  10. CDRIVE

    Help design analog multiplier to use as AM modulator

    That is rather... no, ... it's extremely odd. AM is always impressed on the finals for a very good reason. If you inject it prior to carrier multiplication, which is usually operated class B or C, the audio will be garbage when it gets to the finals. Even if the multipliers were operated class A...
  11. CDRIVE

    Help design analog multiplier to use as AM modulator

    Are we talking about audio modulation here? Chris
  12. CDRIVE

    home powered water pump generator.

    Maybe if he turned absolutely everything off in the house he might see it burp. A generator affixed to a stationary bicycle would be more effective and give him a workout to boot. Chris
  13. CDRIVE

    home powered water pump generator.

    Yup, that would be the operative term. Chris
  14. CDRIVE

    home powered water pump generator.

    If that implies that you'll be pumping the water up to the loft then the reality that CocaCola conveyed will be compounded. You're generator can't recover more than a fraction of the energy required to pump the water up there in the first place. Chris
  15. CDRIVE

    What happened to EinarA?

    Steve, I'd like that very much but I've given up solving the world's problems, or even knowing anything about them. I spent most of my life as a political junky but after the Nov elections I've been striving to be a better American by maintaining a cerebrally vegetative state. According to my...
  16. CDRIVE

    What happened to EinarA?

    I must admit it looks soft and comforting and probably why when Christmas is approaching young children are always looking at me and pointing. I've actually overheard parents saying "No, that's not Santa". :D Chris
  17. CDRIVE

    What happened to EinarA?

    I guess that to an experienced new guy on the block we can seem like a clique, or more more descriptive, ... a wolf pack snapping at his ankles. Admittedly, it's usually just perceived. I have an early thread here that I don't consider one of my finest moments but I never considered deleting...
  18. CDRIVE

    diode for collapsing magnetic field

    The Diodes and Zener should look like this. Chris
  19. CDRIVE

    diode for collapsing magnetic field

    In my last post I made no mention of the coil circuit of the motor relay because the compressor ran fine when you wired it directly to the battery, I assumed voltage drop when you said that it didn't run at full RPM when controlled by the relay contacts. However, this doesn't account for why the...
  20. CDRIVE

    diode for collapsing magnetic field

    If I were you I'd be checking all conductors and connections from the battery to the 30A fuse. Then from the fuse to the relay contacts and from the relay contacts to the motor. What gauge wire did you say it is? Chris
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