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  1. Externet

    Pressure sensor technique

    Pressure is not measured in Newtons. Force is. Automotive sensors come cheap in many flavors; perhaps one fits your needs. Like the intake pressure sensor.
  2. Externet

    Help

    Hi. Very poorly titled thread. Cannot understand the red part. Can you clarify ? Modern battery chargers do not work if something that is not a battery in a certain state of charge is connected. But you can always make a charger the style the old was if what you want is to return to the old...
  3. Externet

    Intermittent audio from speakers

    And also probe the speaker terminals for DC presence at low volume when happens to work. If there is DC; the relay is acting properly disconnecting the speakers as there is a fault.
  4. Externet

    Can Crusher - High School Physics Porject

    Motorized screw action or hydraulics could also do the crushing without high voltages. Perhaps can be done manually with large levers. Once met a guy who turned aluminium cans into 1 inch cubes, believed used elaborated machinery. Was neat to see how convoluted the compressed aluminium can...
  5. Externet

    Making a battery to charge my laptop on the road

    Better choose a simpler project to start getting out of the 'total noob' condition. The most convenient approach for your laptop on the road is, as suggested, get extra battery packs for it. Have you thought of gluing a 20V solar panel sized to the laptop lid ? Will take longer to charge, but...
  6. Externet

    12v Turn signal and running lights?

    12V 21W bulbs are typical for turn lights. It is possible to limit the current on them or wire both sides bulbs in series for running lights. A relay intermittently shorting one of the series bulbs can work as turn signal at full 21W.
  7. Externet

    Making a battery to charge my laptop on the road

    If 'on the road' means on the road, not on a bicycle... Building a gadget takes a budget; time to gather parts; patience putting all together, testing, going back to the drawing board, modifying, retesting, and then there is the proper housing... It is nearly impossible to compete with: ---->...
  8. Externet

    Recent forum activity...

    Hi. Is there any data to compare if the forum activity has increased or decreased after the last changes a few months ago ?
  9. Externet

    Unknown component

    Seen those as fuel shut-off in carburetors for small engines/mowers/karts/scooters...
  10. Externet

    Searching for the perfect lcd display

    Somebody, somewhere is manufacturing these and other drone fpv related; find out its resolution...
  11. Externet

    Searching for the perfect lcd display

    Look at the right column if that is near enough your wishes. There is maaaany more to be checked. ----> https://en.wikipedia.org/wiki/LG_GD880_Mini It may show up at ebay, salvage its display.
  12. Externet

    Signal meter salvage NHY6

    Is it like this ?
  13. Externet

    Satellite and Radio signal

    These antennas you see everywhere for television reception, receive radiowaves from satellites day and night equally.
  14. Externet

    Modifying automotive alternator windings...

    What to expect if the three windings in a plain automotive alternator are rewired to a series connection ? Would it yield higher frequency single phase ? Would the output yield higher DC voltage after a bridge rectifier ? Would it release the smoke if windings get paralleled instead ?
  15. Externet

    Creativity project

    Or, the simplest I can think of; a helicoidal transporter A. A timed or stepper motor driven shaft B can dosify precise chosen amounts. It is like a meat grinder without the grinding end, fed by a hopper at righttopE that dumps to G.
  16. Externet

    Multimeter SOAR ME-501

    Without answering the question, but asking instead; what do you see below the pair of blue and red shorter wires ? Shows like a dark spot on the image, between the white trimmer and a green capacitor?. Is it a lifted pad still attached to the end of the disconnected red wire ?
  17. Externet

    Is there a name for this type of motor ?

    Another elaborated response from Edd... thank you, muchacho, for your permanent dedication. From what I remember... It was only about 50 years ago... :rolleyes: the yellow arrows point to a sliding contact that supply the connection for the movable brushes assembly. Its solid design with no...
  18. Externet

    Nichrome wire help

    Measure the voltage of the battery while the nichrome wire is energized...
  19. Externet

    Creativity project

    As a project, you will need ALL the parts to put it together. Get one the flavor of your choice ----> https://www.aliexpress.com/wholesale?SearchText=automatic+fish+feeder&opensearch=true and dismantle it to pieces. NOW you have all parts needed, including a proper housing!, proven tested...
  20. Externet

    Is there a name for this type of motor ?

    Thanks. Does that type of controllable universal motor have a 'name' or description ? Here is one running ----> An a guy butchering one between time stamp 7:00 and 9:00 ---->
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