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  1. 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...
  2. 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...
  3. 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...
  4. hevans1944

    High Voltage Direct Current

    If we humans do what we have evolved to do, kill and/or enslave all competition, then no cockroach is safe. I am not placing any bets for life of any kind remaining on this planet during the next ten thousand years. Civilizations rise and then fall by self-destruction on a regular basis. The...
  5. hevans1944

    High Voltage Direct Current

    @HarryA: The "contest" deadline has been moved up to today, April 19, 2023. Read the Amendments section of the Contest Rules. HVDC power transmission is already a "done deal" in several places, both in the USA and in Europe. It relies on the ability of the HVDC network to rectify large amounts...
  6. hevans1944

    Strange Logo

    Looks like it might be a mosfet.
  7. hevans1944

    IR Beam Break sensor

    Welcome to Maker Pro (formerly Electronics Point), @isaashbasett. BTW, you have responded to a thread that is almost a year old now. The original poster or OP, @grcshekar, posted only twice after joining Maker Pro on June 18, 2022. The OP did not engage in a dialog with others (forum members)...
  8. hevans1944

    Digital Space Noise Detector

    Thank you for that response. There are statistical tests that can be performed to determine if a large sequence of "random" numbers meets some definition of randomness (there are several definitions currently in use). So, if you want to build and market a commercial device, you need to determine...
  9. hevans1944

    Digital Space Noise Detector

    The "mixing" of two (or more) sine waves of different frequencies to create sum and difference frequency components is a well-known phenomenon. It is called heterodyning. It only occurs if the "mixing" is performed with a non-linear device, such as a human ear which has a logarithmic response...
  10. hevans1944

    Just Me

    Not to worry! Once you get the neuralink your brain becomes a part of the hive mind. Monetary loans and the concept of debt will not apply. It will be like a communist nirvana! From you, according to your abilities, to you according to what the hive mind thinks you need. Please ignore the man...
  11. hevans1944

    Digital Space Noise Detector

    This is true, but a finite-sized flash drive cannot hold a truly random set of bits either. Try generating, in binary, the number pi, which is approximately 3, to a few hundred-thousand or so bits and then take any sequential set from that series, enough to fill up your flash drive. That set...
  12. hevans1944

    Just Me

    Again, welcome to Maker Pro, Jose. The above remarks are NOT typical of every conversation in these forums, but most of us here try to have fun and try not to take each other too seriously. Electronics is another matter: most of us take that quite seriously. Please tell us what your interests...
  13. hevans1944

    Just Me

    Not to worry! I read somewhere that Elon Musk has a way to reverse your mind's deterioration by simply inserting one or a few neurolink chips in your brain and connecting them to a humongous file server/super-computer/and personal AI. A monthly subscription fee applies... You may want to see if...
  14. hevans1944

    Digital Space Noise Detector

    Convolving information with randomness produces a truly random signal that nevertheless contains all the original information. The original information can be recovered by convolving the randomized information with the the exact same "randomness" used in the original convolution. This is known...
  15. hevans1944

    Vape Internal LED

    I thought folks had stopped posting here about vapes... why did you take your vape apart? Most vapes use a rechargeable lithium-ion battery that produces about three volts when fully charged. Most LEDs require more voltage than a 1.5V AA cell can deliver. Try connecting two AA cells in series...
  16. hevans1944

    Help with work to finish my college. Help me please!

    Looks like his deadline has passed. Lots of excuses for why he didn't finish. Why are we wasting time and bandwidth on this thread? Maybe a moderator should close this thread to further responses? BTW, the OP @leok appears to be a drive-by poster who hasn't been seen here since January 10, 2022.
  17. hevans1944

    Transfering video using light

    How is this not homework? And a two-month deadline for results? I would go with Option 2. I would first try to use NTSC or PAL video (if you have it) to modulate a laser-diode light source. Use a fast silicon PiN photo-detector or a photomultiplier tube to receive the laser light and demodulate...
  18. hevans1944

    Designing a soldering iron for limited dexterity

    Old thread or not, I think this is a worthwhile effort. My wife is an artist and she is becoming blind with macular degeneratin, as well as losing dexterity in her hands because of her health conditions. These conditions impact her ability to draw, paint, and throw clay for pottery. It would...
  19. hevans1944

    Mains quick testers.

    I was born in Appalachia (Welch, WVA, USA), and so I inherited the version of English that is spoken there. There is some Native American Cherokee Indian blood in me too, but I don't identify much with those people, except spiritually. When Dad came back from WWII, an officer in the Army and...
  20. hevans1944

    Closed loop for two brushless motors

    @Minder: I guess I am completely out-of-date on motion-control technology!
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