Search results

Search Forums New Posts
  1. N

    Software for laying out UI

    netbeans? JavaFX scene builder Python TKinter . But, in drawing them, you'll basically be designing them. Quick, easy, adaptable. :)
  2. N

    Which pole is up?

    Well, Duh. Of course we are on the top! Maps are mostly made by others...
  3. N

    Small motor controller circuit board transformer

    Ok, as a long shot, does the jigsaw have a brand & model? Any chance of a manual? There may be someone of ecperience here, but for the most part transformers look like transformers. There are a few different footprints, but they come in a variety of windings & having them made to specifics is...
  4. N

    Small motor controller circuit board transformer

    What's the board? If you have a board number, Id, for the board, there may be a schematic available, which shows the part numbers for components.
  5. N

    is an optocoupler faster rise time than a transistor?

    Been a while since I've used optoisiolators seriously, but I do remember reservations about their speed. I presume it was something to do with their capacitance somewhere. Anyway, there will be some compromise between speed and power, two of your previous themes. If you lower the resistor values...
  6. N

    COVID-19

    Ballot? - How long will the situation last? If you accept, as some do, that this sort of thing may continue, on and off for some time, perhaps decide whether you want no family there, for years, or accept the worst and move to some form of roster and/or ballot? What I remind myself is that...
  7. N

    Has anyone here ever used a serial screen?

    Yes. What would you like to ask? . BTW: Each of us has knowledge according to our experience & learning so some have seen limitations that don't affect all applications. Traditional UARTs tend to be slow for good reasons. Displays now need more data & hence higher data rates for good reasons...
  8. N

    Has anyone here ever used a serial screen?

    OK, sorry. Screen to what? A shell, so text only, but to an operatiing system? A serial channel, as in communications port, for debugging, programmed entry & display? A full graphics capable, but programmed . My LCDs that I put on SPI are great, they are text & graphics capable & support...
  9. N

    LC circuit Mutual Coupling

    Yep that pretty much repeats what you said above, that I didn't undertand the motivation or purpose of. I'll leave it to those smarter than I am.
  10. N

    Has anyone here ever used a serial screen?

    I used to often use VT100 & VT220s. Are these serial screens? I've used SPI-connected LCD displays, on Raspberry pis & such. Is that the sort of thing you mean?
  11. N

    LC circuit Mutual Coupling

    Sorry, I am a little lost on what your aim is. Hence do not know which direction to suggest . Are you wanting to make an oscillator? . Do you want to detect the proximity of the other circuit from the mutual coupling with another circuit?
  12. N

    Woo-Woo Infrasound and leaky feeders

    I'm not sure how one decides what is real & what is just in one's head. . Leaky feeders are designed. Normal coax is designed to not leak as that would be power loss. If your coax has a number on the side, then you can look up its specs. If it's a standard number then it's not leaking anything...
  13. N

    Comedy Thread

    I guess it's a matter of proficiency level. After 22 years in an English-speaking country - my wife reads it as easily as I do.
  14. N

    I want to make a microphone/ headset controller for my pc

    I guess the normal answer is either a usb headset or analogue components + software to control every aspect of the sound, on off, volume, tone controls. . Seems most of what you ask for is provided by the sound hardware of the computer and software controlled. . If you have a need for the...
  15. N

    Which proximity sensor can be implemented from inside of a metal body or casing?

    Can the human be taught to do a Sheldon Cooper knock on the box? . Anyway, it's tough to realistically suggest how without a few more details. . With an extremely well defined environment that is otherwise static: Whole box is an antenna, senses field change? Whole box electrode, capacitive...
  16. N

    Which proximity sensor can be implemented from inside of a metal body or casing?

    Basically the news is bad. Your only hope is to explain more about the scenario in the hope that something very controlled about the scenario allows you an option. How thick is the casting? Is it allowed to be purpose designed? Changed? Is the rest of the scenarion controlled, empty or...
  17. N

    Calculate Transistor Parameters

    Your instinct that something is wrong is correct. . If your first equation gives you the voltage on the emitter resistor, then this is the voltage, hence relates to the total current through it. This tells you the total current throught the resistor being a combination, addition of the...
  18. N

    Signal lenght detection

    Seems most of the answers above are good ideas. Just as an aside, the idea of using a 555 is probably also viable. One possible approach is to have quiet times reset the timer, so if not reset in a certain amount of time, the timer times out, doing whatever it is that you wanted.
  19. N

    Need some help finding direction for a new project

    While either might work, you might find, as we did, that reverberation time is an even better indicator than resonant frequency if you try this method. :)
  20. N

    Step down transformer

    I presume the circuit will be similar to that shown as the figure after "Detecting Darkness" of https://www.evilmadscientist.com/2008/simple-solar-circuits/ Yes, the solar cell during the day will attempt to charge the downconverter. Not my area, sorry. Someone else may be able to comment on...
Top