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  1. hevans1944

    How does microchip store data?

    What!? You are asking the moderators to lock up and terminate further comments on this interesting discussion thread concerning physics and space-time? Not, that I have anything to contribute, but this thread was started (ten years ago) by a "drive by" poster who joined Electronics Point (the...
  2. hevans1944

    The T-Board keyboard. And my first PCB! (Designed with OsmondPCB.)

    @Explorer: This website has three ways to create and respond to threads. If you select a discussion thread in one of the forums, that is the usual way. You may also be invited to participate in a (private) conversation, or you can create one yourself. The third way is to create a project, which...
  3. hevans1944

    My T-Board Keyboard, my first PCB, and my experience with OsmondPCB...

    I just found this older thread, started by @Explorer on May 16, 2023. Glad to see you were finally able to launch your project. I am really sorry about the death of your cat, who was smart enough to use a toilet instead of a stinky litter box. We now have two cats living with us. The first one...
  4. hevans1944

    The T-Board keyboard. And my first PCB! (Designed with OsmondPCB.)

    I don't do marching bands at my age, so the kilt doesn't apply. Play naked. It's a heck of lot more fun! Actually, I never did march in a band or learn to play any musical instrument except for a rubber comb with waxed paper wrapped around it. You sort of bite down on the waxed paper and hum...
  5. hevans1944

    The T-Board keyboard. And my first PCB! (Designed with OsmondPCB.)

    @Explorer: Jacki, I have been reading your other posts here on Maker Pro about your efforts to build a bagpipe synthesizer. Great documentation on MediaFire! Have you considered using a commercial keyboard that has a MIDI (Musical Instrument Data Interface) serial data port that you interface...
  6. hevans1944

    Low frequency adjustable but stable oscillator

    Crystal-controlled oscillators are, in general, far superior in frequency accuracy and stability than almost anything except an atomic clock or an oscillator "disciplined" by reception of a GPS timing signal (which is derived from an atomic "clock," usually rubidium in the satellite). GPS...
  7. hevans1944

    beginner- Arduino Uno DC motor h-gate problems

    More importantly, @CD_ look at Figure 7, Typical Application Schematic, on page 10 of the datasheet for suggested wiring information. There are NO connections visible in your pictures shown in post #1 for pins 9 through 16 on the quad half-bridge h-driver chip, SN754410. Pin 16 is supposed to...
  8. hevans1944

    Low frequency adjustable but stable oscillator

    Unfortunately, the location of the OP is (so far) undetermined. If this project is intended for use in Australia, and the synchronous motor is the one I found on the Amazon website, and ALL AC power in Australia is generated at 50 Hz... well, as one of the moderators says (paraphrasing here)...
  9. hevans1944

    Low frequency adjustable but stable oscillator

    If this motor is not running at the desired speed, and you are sincere about building a motor driver, then perhaps you should consider using a stepper motor instead of a synchronous motor. Most largish stepper motors have 200 full-steps per revolution and would therefore require 200/60 = 3-1/3...
  10. hevans1944

    Low frequency adjustable but stable oscillator

    Your post is not helpful. Synchronous motors do NOT vary their synchronous speed as a result of placing a rheostat in the circuit. The synchronous speed is DETERMINED only by the power line frequency. Inserting "a little sensor in there and spin it up" is not good advice, either with or without...
  11. hevans1944

    Low frequency adjustable but stable oscillator

    That sounds suspiciously like the speed the motor would run if the line voltage was 60 Hz instead of 50 Hz. It clearly says on the motor that it runs at 1 RPM (Revolutions Per Minute) with 50 Hz 110 VAC power and 1.2 RPM with 60 Hz 110 VAC. See this Amazon page for pictures and specifications of...
  12. hevans1944

    electronic Tesla valve (ETV)

    Nah! We don't do that here. No flame wars either. There is a little button named "IGNORE" that will be revealed if you mouse your cursor over a member's name near the beginning of each of their posts. Click on that and nevermore see their posts! Well, that's how I think it should work, but I've...
  13. hevans1944

    High Voltage Direct Current

    Satire, perhaps, but "funny money" is nothing to jest about. My Government's printing of an excessive amount of fiat paper dollars has caused an inflationary spiral that has already cost me almost one hundred dollars every month because it decreases the yield on my TIAA-CREF retirement annuity...
  14. hevans1944

    electronic Tesla valve (ETV)

    I have come to believe, based on @dragon's many convoluted, inaccurate, and nonsensical posts, that it is a complete waste of my time to read anything that this person posts to our forums. Good luck on that ever happening. My prototyping work is usually messy, but if I want to convince others...
  15. hevans1944

    High Voltage Direct Current

    Sure it is! It says so in plain words, printed on every fiat paper note, attested to by the signature of the Treasurer of the United States Government and the signature of the Secretary of the Treasury. But please don't ask what is in the "gold vault" located in Fort Knox, Kentucky to back up...
  16. hevans1944

    High Voltage Direct Current

    I agree. I wonder if there is anything, short of The Second Coming of Christ, that will improve things... Congratulations on being debt-free. Cash is King! And it may soon be that gold and silver coins will become the ONLY money accepted in trade because only these two metals have held their...
  17. hevans1944

    High Voltage Direct Current

    PPS - It is always easier to ask for forgiveness, rather than risk the refusal of permission. Saves a lot of time, too, unless it is abused. I did mention "precious" commodity instead of specifically naming silver. Several things qualify as "precious" (besides the Ring of Power) and I think...
  18. hevans1944

    High Voltage Direct Current

    I enjoy these dialogs with @kellys_eye and wish others would join us. I don't think either he nor I will have any influence on how things will progress from here, but as noted elsewhere, time has a way of healing all wounds... or is it wounding all heels? Que sera sera. That is what Bitcoin...
  19. hevans1944

    High Voltage Direct Current

    Okay, @kellys_eye, perhaps I was feeling a bit pessimistic in my post #8. The human race is probably at least 100,000 years old, so who knows how many times "civilization" has arisen and fallen... time has a way of obliterating history. Does it, really? How does anyone know what the long-term...
  20. hevans1944

    How is IOT different from Embedded Systems?

    @cryptonian: I liked your post #14, but this is a very old thread. If you want to discuss IoT and/or Embedded Systems, perhaps you should start a NEW thread. Or maybe a moderator could move your comment as the first post to a new thread and close this old thread. Some of the initial responders...
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