Spyman

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Spyman last won the day on April 1 2015

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  1. Smoking cessation...

    This thread have some great advices: http://www.scienceforums.net/topic/54213-nicotine-tapering-method-to-quit-smoking/
  2. Help Me Repairing A Stablizer

    I am sorry, but I can't give you any guarantees about your inverter's output, as i don't have any experience with it, however at my work we have lots of computers running on UPS power supplies to protect them from surges and brownouts from our mains. The charger in the UPS could still be connected to the battery even if the UPS is disconnected from the mains, if it is powerless it should not interfere with another charger, but I need to stress that I can't give any guarantee that connecting a second charger won't harm the UPS or the charger. EDIT: If you are going to try this you need to know that a 12 volts 20 amperes charger will only give 12 x 20 = 240 Watts. If you need 300 Watts output then you need a 25 ampere charger and for 600 watts you need a 50 amperes charger. The battery can cover for a larger need for a short duration but if you want to run constantly then the charger need to be greater than your average consumption. Also the inverter have losses so you need to make sure you have a little extra for this too.
  3. Help Me Repairing A Stablizer

    If it is a good inverter then it will not destroy your appliances, and if you already have used it for longer durations without mishaps then I don't think it will be more harmful for your equipment if you were to always use it. The problem with another separate charger is when your mains voltage goes above 170 VAC and the UPS also tries to charge the battery, then there will be two chargers competing on the battery voltage and if they don't work together one or both could be destroyed. If the UPS allows a separate charger and you can find a charger that is compatible with it, then it would probably work.
  4. Help Me Repairing A Stablizer

    If you want 220 VAC independent of input voltage then you need some kind of inverter. It have to automatically switch from bypass mode when voltage drops to low and start to supply 220 VAC but still be able to continue charging its battery or capacitors in the intermediate circuit with the low input voltage. (Or if you have very long periods with low voltage then you could have a separate charger and inverter and manually turn them on when they are needed.) Much like your UPS but with an intermediate mode where it supplies enhanced power while still charging the battery from the low input voltage. I have no idea of what models and brands there are on the market that can fulfill your needs, but I am sure a local salesman or the second repairman can help you. (If your voltage normally is so low, then there should be lots of different equipment to choose from.)
  5. Help Me Repairing A Stablizer

    There is nothing in that device that will make it able to output exactly 220 VAC. It has three stages, adding a low voltage to input, removing a low voltage from input or forwarding input to output. (Also if the input voltage goes way too low the relays will not be able to activate and it can only forward input to output.) It is likely that you have changed the settings for the two potentiometers such that the two relays no longer can activate as they should. Finding the correct settings for the potentiometers without access to adjustable voltage is not going to be easy and since it requires adjusting with live voltage it will be dangerous. My recommendation is that you take it back to the second repairman and let him redo the adjustment and check the unit again. But even with the settings back as they were intended, the unit will not be able to give 220 VAC from 90 VAC. However when your main voltage is above 180 VAC it can stabilize the voltage and ease the strain on your UPS.
  6. Personal photos showing curvature of earth?

    Yes, but my view of a flat Earth is the old fashioned with a fixed Earth and an absolute up and down. If they believe that the flat Earth is like a spinning coin orbiting the Sun and has the Moon as an orbiting companion, then they have already come very far from the old model and the final step to a spherical Earth is small.
  7. The Alien Scientist

    Thank you for clearing up the misunderstanding.
  8. Help Me Repairing A Stablizer

    The front implies that the device can handle 90 to 250 VAC but it does not specifically guarantee that it will output 220 VAC from 90 VAC. From the image it looks more like there is one indicator light that shows that the input is between this level and one indicator that shows when the output is around 220 VAC. Did you take note on how they where located so that you can return them to the position the second repairman placed them in? How do you know it gives power if the electric iron didn't work? Good. What voltage did they show with the electric iron connected? Can you get a light bulb for testing? It is not as good as a voltmeter, but satisfies to give a rough voltage indication and is not expensive. You also missed out to reply to this important question:
  9. Personal photos showing curvature of earth?

    During a partial lunar eclipse we can look up and see the curved shadow of Earth on the Moon: A lunar eclipse occurs in two regions, an outer penumbral shadow where the sunlight is dimmed, and an inner umbral shadow, where much dimmer sunlight only exists by refraction through the Earth's atmosphere, leaving a red color. This can be seen in different exposures of a partial lunar eclipse, for example here with exposures of 1/80, 2/5, and 2 seconds. https://en.wikipedia.org/wiki/Lunar_eclipse Maybe you and your friend can see it yourselves on September 28: A total lunar eclipse will take place on September 28, 2015. The eclipse will be visible over Europe, the Middle East, Africa, and the Americas. View of Earth from Moon The following simulation shows the approximate appearance of the Moon passing through the earth's shadow. https://en.wikipedia.org/wiki/September_2015_lunar_eclipse
  10. Personal photos showing curvature of earth?

    Well, speaking for myself, I can personally confirm that gravity exists and see with my own eyes how the Moon is shaped, logically it is gravity that holds all the parts of a natural celestial object together, thus the Earth has to be round too.
  11. Personal photos showing curvature of earth?

    If he believes in a world wide conspiracy that hides the truth of a flat Earth, then why do you think he would trust personal photos from strangers on the internet?
  12. Help Me Repairing A Stablizer

    This thread is getting slightly out of hand, first we need to understand and solve the issue with the stabilizer before we can move on to other equipment the OP want to connect to it. ----- I have only looked at a few of the photos since I have serious trouble with dropbox from work and this seems to be a very simple device only able to stabilize voltage above around 180-190 VAC and up to 250-260 VAC with a maximum current of 10 amperes. There is no pulse wide modulation, switching nor capacitor filtering in this unit. I guess it has a low voltage transformer that probably has an output of around 24 to 30 VAC which then is put in series, (by the two relays), with the line supply, such that it either increase or decrease the output voltage. The two potentiometers is there to adjust the voltage limits when one of the relays should activate to alter the output. So for an example if the input goes below 200 VAC, then one relay change state such that the transformator output adds to the line voltage which would then give an output of 200 + 24 = 224 VAC and if the input goes above 250 VAC, then the other relay change state such that the transformator voltage lowers the output voltage to 250 - 24 = 226 VAC. Of course the output voltage of the transformer would also decrease or increase with the same amount as the input voltage changes, which means that around 180 VAC the output would only be around 200 VAC. ----- The second repairman seemed to know what he was talking about and doing, and since the unit apparently worked when he tested it, within the voltage limits he concluded the stabilizer only can handle, have you changed anything or did anything happen afterwards? When the stabilizer is deemed to not be working, is it not working above 180 VAC input or not working below 180 VAC input? The stabilizer seem to have two meters on the front, what do they measure, input, output, voltage or amperes? What does the two meters on the stabilizer show with and without the 1000 watts electric iron connected? What does the two meters on the stabilizer show with and without a standard light bulb connected? Is the light bulb dark, glowing or shining?
  13. A basic light circuit.

    That would depend on the potential of the circuit and the charge of the capacitor at the end of the wires. If the battery is connected long enough for the potential to even out and if the battery later is reconnected with the polarity switched, then L3 will light up. For the second circuit the capacitor is almost entirely removed and to small to light up L3.
  14. The Alien Scientist

    Well yes, sure they could probably compete or even be considered superior in scientific knowledge and they could likely teach the caveman some useful stuff. But that was not the question, the question is if they can be trusted on everything they claim knowledge of. Should we take their word for it and accept whatever thay say without questioning it, just because they step out from a fancy ride? You seem to argue that anyone with "a functional interstellar spaceship" is all-knowing, infallible and only wants the best for us. I think 'they' could be wrong about many things, make mistakes and even straight out lie to us if it would benefit them.
  15. The Alien Scientist

    A caveman would probably learn a lot from listening to a former Resident Expert at SFN, but how much not relevant crap could he be fed if he would meet a random proponent from our Speculations section?