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  1. negitron

    Alternating current

    They don't. Although the electrical energy itself travels very quickly--some large fraction of the speed of light in most types of insulated wiring, nearly c in uninsulated wires, the electrons themselves travel very, very slowly. The speed at which they move is dependent primarly upon current...
  2. negitron

    Circuit wiring help

    This is just a simple differential current amplifier. There are three components (not counting the battery) which must be connected the right way or it won't work. There is the meter itself, of course. Mind the + and - markings. The capacitor is also polarized. Electrolytics are usually...
  3. negitron

    Electronics and logic gate question
  4. negitron

    Touchscreen Wiring help please!

    Sure, post that too.
  5. negitron

    Touchscreen Wiring help please!

    Well, after studying the pictures I can now tell you a few things about the display that I know from my work experience. These things may or may not help you but I hope they do. First, looking at the full view of the back of the unit, the single black and two pink wires at the bottom right are...
  6. negitron

    Touchscreen Wiring help please!

    Ah, this thing: That's probably a proprietary interface. You might be able to work it out experimentally, if you're careful; but the chances of anyone here knowing offhand is...
  7. negitron

    Touchscreen Wiring help please!

    Why is all that information scratched off the board? That's stuff you probably need to figure out what it is. It's certainly stuff I would need in order to identify it.
  8. negitron

    Iconic three word movie quotes?

    Except they really are all three-word quotes. A contraction is one word regardless of how many words it is formed from. Shouldn't've, for example, is only one word.
  9. negitron

    Power Grid

    No, but if everyone turns their power back on at the same time, that might cause momentary outages as systems switch over to handle the sudden demand.
  10. negitron

    Testing machine

    ...Google unsafe images. :wink:
  11. negitron

    Old butter

    Molds, fungi and bacteria do not do well on butter because it's nearly pure fat with little moisture. The occasional addition of salt makes it even less palatable to microorganisms. It is likely to be still entirely edible, if rather rancid.
  12. negitron

    Long distance transmission of power

    Assuming the wire stays consistent, the resistance increases linearly with length. If the resistance of a transmission wire is 1 ohm per 1000/ft, then the wire to a town 100 km away will be 100 ohms. On the other hand, by inspection of I2R, you can see the watts losses increase with the square...
  13. negitron

    Caught Staring!

    Debunked hoax.
  14. negitron

    Stargazing I discovered an eclipse cycle

    I found a discussion of thirteen-month calandars in which the figure in the OP falls naturally out of the conversation:
  15. negitron

    Greatest challenge for science- Reincarnation

    Of course, the failure of science to observe an event can also indicate the event doesn't occur. The longer science goes without being able to observe an event which should be observable, the less likely the event is to ever occur.
  16. negitron

    Hostile non-smokers

    Education only goes so far. You can NOT force someone to learn something. You can force them to go to school, you can force them to sit through classes, you can even force them to repeat grades until they pass (do they even still do that anymore?) but you can NOT force them to learn. Or if...
  17. negitron

    AUX In/Out Power? Same discussion applies here.
  18. negitron

    Hostile non-smokers

    CO2 is deadly, too. Just in a different way.
  19. negitron

    Hostile non-smokers

    First of all, punishment has a particular meaning which is NOT covered by any of the examples you have here. It does not simply mean "do something bad to someone." Secondly, there are plenty of laws which don't "punish" anyone; who suffers the "punishment" when laws against, for example, car...
  20. negitron

    Hostile non-smokers

    Depends. Did you read your lease carefully? (7) There is no cause of action for a nuisance under Subsection (3) if the rental, lease, or 7 purchase agreement for the unit states in writing that: 8 (a) smoking is allowed in other units and that tobacco smoke from those units...
  21. negitron

    Does the earth rotate and undergo revolution with the same speed?

    What does it mean when I tell you, for example, that the Earth has a diameter of 7400 miles and it makes one revolution in 24 hours? Can't you relate that to an angular velocity with simple arithmetic?
  22. negitron

    Does the earth rotate and undergo revolution with the same speed?

    The figures in my post are given as angular velocity, albeit somehwat indirectly.
  23. negitron

    What's inside an op amp?

    It may not hae been initially clear, but there's a link in my prior post which answers your op-amp question. An op-amp is an amplifier which has the following characteristics: EDIT: I've bolded an error I just noticed in the previous link. Everything else looks okay, but I'll provide an...
  24. negitron

    What's inside an op amp?

    Instead of trying to understand op-amps as the sum of their parts, youy're probably beetter off learning op-amp theory as a fundamental unit. Think of an op-amp as a black box; you don't need to know what's inside in order to understand it, you need only know how it behaves given specific...
  25. negitron

    Making an OR Gate

    Sure. Start by reviewing the truth tables for the gates in question.
  26. negitron

    Hostile non-smokers

    You wanna think about that for a minute? If they're a group, either the nonsmokers already expect to be in a smoking environment or the smokers already expect to be in a nonsmoking one. Nobody's actually giving up anything.
  27. negitron

    Protection of car from thndrstrom

    In fact, lightining can travel as far as twenty miles through the air. One way or another, the lightning which sxtrikes your car will find its way out the bottom of the vehicle to ground. If nothing else, it wil jump the <12" gap between the bottom of the chassis and the ground below; the...
  28. negitron

    Ferrite impregnated Silicone?

    You don't need ferrite, you need an electrically conductive material. Ferrite is great for magnetic shielding, but is terrible for RF EMI. Try something like this: [Broken] Be sure you ground all of...
  29. negitron

    RIP Radio Shack - No more ICs [or nearly so]

    Is not. You just need a modern set of skills and tools. Lots of stuff is still perfectly fixable; the tricky part is getting the parts.