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Everything posted by Externet

  1. Flashlight battery polarity (mixed) ?

    It is different to say 'the flashlight does not turn on' and 'the voltage is zero' A LED will not turn on with only 1.5V. Needs to be supplied with more than its Vf.
  2. Copy and paste...

    ¿? Did not have a clue there was a related movie. Just believe it is way too sad that all the knowledge accumulated has to end wasted in a graveyard with no 'recycling' use.
  3. Copy and paste...

    Has any research been done, experiment or attempts of any sort to transfer the knowledge and experiences from the brain of a sixties lucid person to a twentiesh year old ? It is usually called teaching, but in a more technological and quick way. Short of implanting a USB socket under the hair... Would such be happening in 100 years from now ? Implications would certainly be impacting.
  4. Hi. A printer that works fine wired trough USB has been added a generic adapter at its USB jack that allows Wireless. How to tell Windows 10 to recognize the printer is now in wireless mode ? There is no WiFi routers nor other wireless networks related in the premises. A PC and a now wireless printer. [ PC<------>printer ] For a 'normal' wireless printer to work with only one single PC; is a wireless router needed ?
  5. To install a wireless printer to Windows 10 ?

    Thanks to all of you, guys. The PC is a modern one with built-in WiFi and enabled, and tested working fine.. The printer is old without WiFi capability from factory. An USB-to-WiFi adapter is much newer than when the printer was designed, has been added/plugged to it. The adapter supplies its own 5V for operation and for 'plugged-in' detection at the printer receptacle That USB-to-WiFi adapter is proven working, allowed WiFi internet to a laptop in another scenario, with zero setups, drivers or anything. Plugged in and performed. It works like a 'bridge'. Transceives USB 'language ' over WiFi signal. Will explore the ad-hoc setting.
  6. What is the difference between (same wavelenght) LED light and a laser light exiting a diverging lens ?
  7. Cannot find even a picture of it. It is a fountain enclosed inside a clear plastic cylinder, about 10cm diam x 20 cm high, with a blue dyed fluid in it. After 'charging it' upside-down, when placed upright, a centered nozzle squirted upright, a stream as a fountain, with a duration of a few minutes. I think I bought it from 'Edmund Scientific' mid seventies. Anyone knows the name of it ?
  8. Educational toy/gadget I cannot find...

    Yesssss ! Thank you +1
  9. Hi all. What to expect from electroplating a 'target' metal with two (or more) different 'donor' electrodes cyclically switched on for few seconds ? I do not have the equipment to experiment. Example... an iron 'target' electrode getting electrodeposition from both submerged copper and tin electrodes in the same vessel but only one timely connected (powered) at a time... With proper timing; would the iron be electroplated with bronze ? Or... several 'donors' creating a complex alloyed surface for corrosion/hardness/properties improvements ? Does such a practice exist in the industry ?
  10. Hi. Are the topic ratings conveyed to authors reputation ?
  11. Topic grading...

    Thanks. Perhaps could be convenient to consider clever topics brought to the table where only responders are 'recognized'. Seen several topics where the original poster is not 'compensated' What is the democratic way ? A poll ? -If the forum firmware allows starcounting-
  12. Alternating electrodeposition...

    Thank you, John. Good. Easy processes do not bring much merit. Plating to the correct percentages an alloy ideally is composed of, would then need different times or currents when a particular anode is switched on, to establish a proper recipe, right ?
  13. Hi. After a peaceful follower of the Quran reads (Surah 5:51) (Surah 2:191-193, 216-218, 244) (Surah 3:157-158, 169, 195) (Surah 4:71-74, 84,91) (Surah 5:35) (Surah 8:12, 17, 39, 60-65, 74-75) (Surah 9:5, 14, 20, 24, 29, 36, 38, 39, 41, 73, 111) (Surah 22: 58, 78) (Surah 25:52) (Surah 29:6) (Surah 47:4) (Surah 61:4, 11) (Surah 66:9) ----> Disobeying these above, by being peaceful towards other religions means going against the Quran ?
  14. Gyroscopic contraption...

    A bicycle, hanged off ground. Wheels turning. No or fixed steering, (or, both wheels on a rigid frame.) Trying/pushing to 'topple' it, some torques become active. If the wheels are turning in opposite directions, What torques/forces to expect trying to topple it? Next... wheels with their shafts at a right angle. What torques/forces to expect trying to topple it? Next... 3 spinning wheels with their shafts in the 3 axis. What torques/forces to expect trying to topple it?
  15. Glaze...

    That clear compound used to cover porcelain, pottery, yielding a very hard surface after the kiln process... What is it made of ? It is sold as a thick liquid ?
  16. And the rest of the planet. Tried to find a link to streaming; only found the next airing, tomorrow ¿GMT? (and something in facebook, which I do not go.) ----> https://www3.nhk.or.jp/nhkworld/en/tv/documentary/201709290600/
  17. Today I saw a documentary program on television proposing politicians to be robots running artificial intelligence. It left me thinking...
  18. The surface of seas would be covered by a poisonous gas layer if Cl volatility happened.
  19. Overhead sensors in freeways...

    Did someone 'pulled my leg' a looong time ago telling me these were to detect 'illegal/undisclosed' transportation of radioactive materials ? Or are those only mass detectors, speed detectors, vehicle counters, toll transponders... ?
  20. Hello, I need a material for my project

    Something like these crucibles ? ----> https://duckduckgo.com/?q=ceramic+crucible&t=canonical&iax=1&ia=images
  21. An "ideal" transport of the future

    That is capacity four. You can install capacity ones inside these booths every block or in front of boutiques, or in offices, the barber shop, no parking needed... Just dial its number and you show up there :
  22. With few working satellites in orbit yet, is the Galileo working today, even with delayed capture, or poor precision, or both ?
  23. An "ideal" transport of the future

    Nothing better than ---->
  24. Where is the gold ?

    That gold mined centuries ago since ancient times, the gold from spaniard conquerors, the gold from mines production in all continents. Physically, where is it ? Cannot believe that a substantial amount is in jewelry or museums. The amount of gold produced in say 3000 years, has to be a huge amount. Where is it now ?
  25. Perhaps this could be in chemistry... Please move if needed. Latex gloves have a short life, degrade in air, and perhaps in contact with some liquids. Nitrile gloves, and other materials gloves in the market... Which one has the longest duration -not puncture related- ? Need to save certain small items inside cut-off fingers off flexible gloves, sealed; and looking for longest life material. Any suggestions ?