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  1. (*steve*)

    Trumps solar wall, forget politics we should just build the thing

    But you make some good points. If the is builds a solar wall and sells the power to Mexico, they would have a way of making Mexico pay for the wall. AND it would put all the Mexican coal miners out of work!! If the US sold the power at a low enough price, it would aside the Mexican economy...
  2. (*steve*)

    Trumps solar wall, forget politics we should just build the thing

    Neither do I. But apparently some people want it to keep people out of the US. These people think there are those who would want to climb it.
  3. (*steve*)

    Trumps solar wall, forget politics we should just build the thing

    Asking the southern border of the US, the panels would be most efficient if angled at between 26 and 29 degrees (depending on how far west you are (the border is located several degrees more north on the west coast of the US). At that angle, the wall would not present a particularly significant...
  4. (*steve*)

    SCR series regulator

    I have a power supply which uses an SCR as the main regulating element. It is a 0-40V 0-30A power supply. It weighs almost 80 lbs. It has the biggest transformer that I've ever seen in a power supply, combined with an absolutely huge set of filter caps. In addition, it has a pretty massive...
  5. (*steve*)

    File indexing on a web server

    The free software is "Apache". If you point it to a directory that doesn't have an index.html (or variants thereof) it will just show a list of the files for you. You can force this if there might be an index.html in there.
  6. (*steve*)

    Measuring Low Power Usage Over Time

    There are multimeters with logging functions, and also some with an isolated issue interface. Either can be used to get an idea of what is happening over time
  7. (*steve*)

    Solar panels with 100W led

    And it is perfectly acceptable to short the output from a solar panel. You can't destroy them that way and the won't produce too much current. A LED with a higher resting than the panel can only be damaged if it is connected backwards or it is poorly heatsinked and gets too hot. Audioguru...
  8. (*steve*)

    What will be the output signal of op-amp?

    It's not a working circuit. It's a demonstration of how the device works. You've probably never seen the equation Vo = a(V+ - V-)
  9. (*steve*)

    SCR series regulator

    SCR regulation introduces a lot of ripple. In most cases it is effectively a mains frequency switch mode power supply. I have seen it used as a pre-3V or, but I doubt it is very good on its own. Do you have a circuit diagram?
  10. (*steve*)

    What will be the output signal of op-amp?

    Perhaps you should Google for op amps with differential output. The other points are not relevant either. There is no suggestion that this is a practical circuit, and it is not uncommon to omit the power supply connections.
  11. (*steve*)

    What will be the output signal of op-amp?

    The input signal is the difference between the two input voltages.
  12. (*steve*)

    How to use switch statement

    Ok Vead, have you written a program to flash a single LED? Can you post that?
  13. (*steve*)

    Whirlpool l1373 card (invensys 475560 )can't identify number for part circled inphoto can you help

    I'll take your word for it, but that image is to small and poorly focused for us to tell.
  14. (*steve*)

    Whirlpool l1373 card (invensys 475560 )can't identify number for part circled inphoto can you help

    Perhaps. Can you take a clear, will focused image of the device that we can read the markings on?
  15. (*steve*)

    DC converter

    At 100% efficiency, just a tad under 29 minutes. In real life, 15 minutes?
  16. (*steve*)

    Dimming Circuit

    Do you have a circuit diagram?
  17. (*steve*)

    Esr capacitor tester

    Pretty much just electrolytic. The reason is that the tester requires the capacitance to be sufficient such that the test impulse does not significantly charge the capacitor. In practice this generally eliminates the testing of many non-electrolytic capacitors. Having said that, there are...
  18. (*steve*)

    24v battery charger

    The short answer is "of course you can connect this charger to a battery". The longer answer involves overcharging and possible failure of the battery.
  19. (*steve*)

    Electrolysis (on as cheap as possible)

    If your water has any chloride ions in it (and it will) then chlorine has will be liberated in preference to oxygen. Chlorine gas is REALLY bad to inhale.
  20. (*steve*)

    Electrolysis (on as cheap as possible)

    Suuuuuure you do. We believe you. Pretty much, yeah. You don't need a higher voltage. No, the simplest solution is to but a cheap multimeter. The easiest way to keep the H2 separate from the O2 is to keep the electrodes spaced and to collect the gasses from each individually. I would...
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