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  1. hevans1944

    tinning

    For prototyping work, especially when wiring components inserted in a solderless breadboard, I use a spool of tinned copper wire, 24 AWG, that is inserted into cut-to-length pieces from a spool of Teflon tubing, sized for a sliding fit over the wire. These two items, a spool of wire and spool of...
  2. hevans1944

    A Stretch

    That may never happen. The Japanese are already far ahead of everyone else in making robots or simulacrums that act like humans. It's not too much of a stretch to think that someone, somewhere, will model the human vocal tract, lungs and chest, mouth, tongue, nasal cavities and then use...
  3. hevans1944

    can I start dc motor with (ultra)concentrator and manual switch

    Clear enough for a layman like me to understand that you understand the negative effects that the regimens of two different drugs prescribed simultaneously can have on the enzyme balance in the human body. I take about a dozen different prescribed drugs every day, and some of them do not play...
  4. hevans1944

    Battery ruined by diode and LED

    Good for you! It's attitudes like this that make it easy for the U.S. Marine Corp to meet recruitment quotas, month after month, year after year, even in times of war. I don't plan on dying, but statistically it appears certain that eventually I will... and so will you. Dying is a "good thing"...
  5. hevans1944

    can I start dc motor with (ultra)concentrator and manual switch

    There is definitely a language barrier here. For example, you said "I did build as a child serial dc induction motor"... What does that even mean? A "dc induction motor" is an oxymoron. Only AC motors can be induction motors, and not all of them are. I surmise that the "500F ultraconcentrator"...
  6. hevans1944

    Battery ruined by diode and LED

    Congratulations, it sounds like you are doing much better than I am, health-wise. I just turned 76 last month, and am trying to at least make it as far as my father did... age 84, but without the lung cancer or any other kind of cancer, thank you. We all gotta die, but living to a ripe old age...
  7. hevans1944

    Battery ruined by diode and LED

    I had to quit using e-cigs (vaping) three years ago, which I had taken up under "doctor's orders" to replace cigarettes after a massive heart attack in 2011 that required five more stents, a pacemaker/defibrillator, and some diet changes. I was getting too much nicotine (which constricts blood...
  8. hevans1944

    Chasing down excessive power consumption

    What!? You have never heard of making mountains out of mole hills?:eek: I can definitely relate to that. I was always a "hands on" engineer, and a pretty damned good electronics technician before I graduated college in 1978 with a Bachelor of Electrical Engineering degree. I cannot imagine...
  9. hevans1944

    A Stretch

    All good and valid points @SparkyCal. Which is why it behooves us to move full speed ahead with digitizing every aspect of music, cramming every last bit of it into some gigantus super-duper artificial intelligence driven computer that can faithfully create the sounds that Sinatra, Joplin...
  10. hevans1944

    Chasing down excessive power consumption

    Does National Grid credit you on a 1:1 basis for energy provided by your solar panels to their grid? In other words, if you send them one kilowatt-hour of energy, and then later consume from their grid one kilowatt-hour of energy, is that a "break even" no-cost-to-you arrangement? Or do the...
  11. hevans1944

    A Stretch

    Happens quite frequently, especially if several EP members get a really interesting dialog going. The moderators have been pretty lenient about letting such threads continue, even if the "conversation" deviates considerably from the "original" topic. However, name calling, abusive language, and...
  12. hevans1944

    Ground control to major tom

    Perhaps a little history will help... Here in America, back in the ancient past (April 1861), there was (briefly) a postal letter-delivery system that basically consisted of a chain of outpost stations in the middle of nowhere, each with a corral of fresh ponies (horses). A rider with a pouch...
  13. hevans1944

    Name them Parts

    Wow! From stomp box to really high-tech electronics toys... you're hooked! Yer life will neva be the same. Mua ha ha ha ha! Ummm... we can help with that.
  14. hevans1944

    A Stretch

    Sounds reel gud, @SparkyCal! Glad to hear you finally got it all together! On a side note... are you aware of any FX box (stomp or otherwise) that will make an electric guitar sound like an acoustic banjo?
  15. hevans1944

    Chasing down excessive power consumption

    Did your solar power installation include the ability to sell energy back to your electric utility during the day, through an inverter connection between the solar panels and the grid? That's what many folks here in southwest Florida do. They get the PV panels installed for free and lease them...
  16. hevans1944

    Op Amp assortment

    My mother once told me how I started my career in the electrical arts, around the age of two or three years old, by sticking her surgical scissors (she was a Registered Nurse) into an electrical outlet while we were living in Denver, CO. I don't actually remember that experience, but apparently...
  17. hevans1944

    Op Amp assortment

    Why don't you select just ONE op-amp type and learn how to use it? Here is an assortment of op-amps available from Amazon, but I have never bought this particular assortment. Caveat emptor, but might be worth risking forty bux.
  18. hevans1944

    A Stretch

    The pot is easy to check with your multi-meter ohms function. Clip the meter leads between the two end leads of the pot. One of these end leads should already be connected to the center (wiper) lead. Measure the change in resistance when the pot shaft is rotated between its two extremes. In one...
  19. hevans1944

    The Adventure Continues......

    I found that out when I tried to "compose" (translate, really, existing music) for my MIDI-controlled Roland synth. Sound was awful, very mechanical with absolutely no "soul" compared to music played by people on real instruments. This may eventually change, as computers become more powerful and...
  20. hevans1944

    A Stretch

    About breadboards versus printed circuit boards... the purpose of a breadboard is to prove or verify the operation of a particular circuit configuration, whereas the purpose of a printed circuit board or PCB is to implement in a reliable manner the operation that was proven or verified on the...
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