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  1. KrisBlueNZ

    Designing a Time Delayed Relay

    Yes, you could monitor the current flow by connecting a circuit in series with it, but there's no good reason to do that. It would cause some problems too: the wires going from the load circuit to the box would need to be quite thick, because they would be carrying the full operating current of...
  2. KrisBlueNZ

    harmonics and fundamental frequency

    I guess I shouldn't have tried to make ANY generalisations! In fact, I'm SURE I shouldn't have.
  3. KrisBlueNZ

    harmonics and fundamental frequency

    Fair comments. Every good generalisation has exceptions! Not really. First of all, "square sawtooth" is a contradiction. But square and sawtooth waves are (or can be thought of as being) made up from multiple sinewaves; one at the fundamental frequency, and others at harmonics (integer...
  4. KrisBlueNZ

    circuit design

    Thanks guys. I'm not sure why I posted that. But you've got to admit, green blue black orange is a pretty sequence of colours to look at :-) Especially on a light blue background. Perhaps we should create a new paradigm for electronic design, based on aesthetics! No more boring brown, black...
  5. KrisBlueNZ

    harmonics and fundamental frequency

    Very diplomatic, bhuvanesh. I guess that's why I like this site so much. So many different points of view available here.
  6. KrisBlueNZ

    harmonics and fundamental frequency

    Thank goodness for that. Yes, good idea.
  7. KrisBlueNZ

    harmonics and fundamental frequency

    Sorry Harald. I think you're brilliant, really I do. But sometimes what people need is a simple explanation that they can relate to. In my experience, German folks seem to have a certain mentality, which produces a lot of the best engineering in the world, but those highly mathematical...
  8. KrisBlueNZ

    voltage and current

    Ditto. "Distraction" is (was) a good game show, but it doesn't relate to voltage or current, as far as I know. Perhaps you mean a different word?
  9. KrisBlueNZ

    harmonics and fundamental frequency

    Ah, you've gotta love Harald. His idea of a simple explanation is a bunch of formulas! Well, he's German, and they just seem to be born with brilliant, analytical engineering-oriented minds. The idea of harmonics is a way to analyse waveforms that aren't perfect sinewaves. A sinewave is a pure...
  10. KrisBlueNZ

    (Woo Woo) Efficient HHO Cell

    And were you responsible for his avatar as well? I don't know where you get them from, but I love them! GSOH Steve.
  11. KrisBlueNZ

    (Woo Woo) Efficient HHO Cell

    Well I'm sure I did the wrong thing, and abused my power (such as it is), and I do apologise. As for the title, I didn't change that, so it's not my call. Sure, electrolysis, like any other process, can never generate more energy than it requires. This is just a basic fact of reality, although...
  12. KrisBlueNZ

    (Woo Woo) Efficient HHO Cell

    van0014, if you see this, I apologise for banning you. You had not violated any forum rules. I was too hasty and I made the wrong decision. I have asked Ian to un-ban you, if that's possible, but he hasn't replied to my PM yet. Please don't hate Electronics Point or any of the other members and...
  13. KrisBlueNZ

    Designing a Time Delayed Relay

    Just straight to the two terminals on the 220VAC motor. When the motor runs, it runs because it has 220VAC across it. This is the voltage that is sensed by the optocoupler.
  14. KrisBlueNZ

    (Woo Woo) Efficient HHO Cell

    The only turning I can foresee is Messrs Joule and others turning in their graves. Do you think banning him was inappropriate?
  15. KrisBlueNZ

    (Woo Woo) Efficient HHO Cell

    LOL :) Sorry, we do science here, not pseudoscience. Edit: Ahh, that's better.
  16. KrisBlueNZ

    Designing a Time Delayed Relay

    Yes, W5/W6 need to have 220VAC across them when the triggering motor is running. When that happens, the controlled motor (connected to W3/W4) will start. When the 220VAC on W5/W6 disappears, the circuit will keep the controlled motor running for another 30 seconds, then it will shut off too...
  17. KrisBlueNZ

    (Woo Woo) Efficient HHO Cell

    Ooh! Ooh! Can I ban him? I've never banned anyone yet... To the OP: Next time, post in a forum that's read by credulous numbskulls who don't know anything about chemistry or electronics. It's obvious that your schematic doesn't do anything, and your pitch (though unfinished) is tiresome.
  18. KrisBlueNZ

    Avoiding collisions in RF setups.

    It depends somewhat on the circumstances - how many stations, how frequent the updates, how much latency you can tolerate between an event occurring at a station and the base finding out about it, how much power each station can afford to waste, how long each transaction takes... There is no...
  19. KrisBlueNZ

    circuit design

    Personally, I choose them based on the colour scheme. You see, resistors have these pretty coloured bands on them, and you have to coordinate them, otherwise they look bad. For example, a 560k resistor is good because it's green, blue, black, orange. Really nice bright colours. But I would...
  20. KrisBlueNZ

    Simultaneous events

    I suspect you won't find any really cheap micro with built-in USB. Multiplexing doesn't just save I/O pins; it simplifies layout (provided your board is double-sided or multi-layer) and reduces the number of ESD protection components needed.
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