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  1. HANKMARS

    Ultrasonic trans/rec transducer support hardware

    The photo in the attachment is of an email I received last night. The best I can tell, the page (419) has expired. Perhaps the message was spam of some sort. Anyway, my transducer transmitter really halls tail when my oscillator hits its resonant freq. I'm using 2 - 555 timers. One produces the...
  2. HANKMARS

    Ultrasonic trans/rec transducer support hardware

    Finding buku driver and receiver circuits. These 2 are pretty close to what I had in mind. I will have to add some programmable logic but I'll see how these work. May have to go to ultra-sensitive receiver circuit.
  3. HANKMARS

    Ultrasonic trans/rec transducer support hardware

    All done in a package for a couple of dollars. Is "a couple of dollars" figurative? Or more like under 100 dollars? I tend to be a tad stingy.
  4. HANKMARS

    Ultrasonic trans/rec transducer support hardware

    True enough. This particular situation calls for no intrusion inside of the tank. No probes or devices are allowed inside. I do recall seeing an ad for a level indicator that was completely external. I remember the tank was elevated on a stand and I think a transducer was underneath pointed at...
  5. HANKMARS

    Ultrasonic trans/rec transducer support hardware

    I tried Arduino.com. Not a retailer. Will try Amazon.
  6. HANKMARS

    Ultrasonic trans/rec transducer support hardware

    I tried Arduino.com. Not a retailer. I'll try Amazon.
  7. HANKMARS

    Ultrasonic trans/rec transducer support hardware

    Where do I shop Arduino?
  8. HANKMARS

    Ultrasonic trans/rec transducer support hardware

    Thanks for the tip on transmission speeds. I was mixing impedance with wave travel time. Radiowaves in water use extreme wavelengths, I assume because of the viscosity. Maybe more so the mass of water being sluggish in respect to producing a wave. Whereas if you produce a concussion in air, e.g...
  9. HANKMARS

    Ultrasonic trans/rec transducer support hardware

    I will try to look that up this afternoon.
  10. HANKMARS

    Ultrasonic trans/rec transducer support hardware

    I agree. I believe I can find time periods of reflected signals through experimentation. My SWAG (scientific wild ass guess) is that the more dense liquid will impede the rate of travel of the sonic burst more so than will the gas. Let's assume that to be true for now. So, if I find a nominal...
  11. HANKMARS

    Ultrasonic trans/rec transducer support hardware

    I did acquire some experience working with ultrasonic transducers when I worked for a man that developed a device called Preg-Check. I'm from Iowa. Pigs are big business there. Some hog farmers may have several hundred brood sows. Large groups of these sows would be bred at the same time. It was...
  12. HANKMARS

    Ultrasonic trans/rec transducer support hardware

    I did find some videos dealing with ultrasonic transducers. Most were either involved with piezo type transducers, which mine are not, or the video was about ultrasonic cleaners.
  13. HANKMARS

    Ultrasonic trans/rec transducer support hardware

    I am reluctant to tell you the actual application. It is a simple application. My friend and I feel as though the device that I am working to design is a viable product and may be easy to market. If retail price can be kept at a level whereas even the impoverished can afford to purchase the...
  14. HANKMARS

    Ultrasonic trans/rec transducer support hardware

    I will be using an ultrasonic transducer (t/r). Ideal signal is 40 kHz. 10 V nominal to transmitter. I am assuming I need to supply a 10 Vpp 40 kHz signal (squarewave?) to transmitter. Also I'm guessing a 40 kHz pass filter will be needed on the receiver component. What I am trying to determine...
  15. HANKMARS

    Cyber mystery

    Interesting. Thanks.
  16. HANKMARS

    Cyber mystery

  17. HANKMARS

    Sharing phone data with stand-alone Bluetooth or Wifi ready monitor

    I'm glad I could make a contribution to your magnificent collection of nothingness.
  18. HANKMARS

    Sharing phone data with stand-alone Bluetooth or Wifi ready monitor

    I need some affirmation on my calcs regarding potential energy of a suspended mass. The mass is a metric ton or 1,000,000 grams. I will use PE for potential energy value. Some may use U denoting change in PE. So PE = m ( mass ) X g ( gravity constant ) X h ( height in meters ). PE=mgh. Earth's...
  19. HANKMARS

    Sharing phone data with stand-alone Bluetooth or Wifi ready monitor

    You owe me no reparations and I have no desire to dish out retribution. With the overwhelming numbers of charlatans crawling out from under their rocks, it is difficult to meet conversations of anything unconventional, with optimism. Lines of communication have become congested with shysters and...
  20. HANKMARS

    Sharing phone data with stand-alone Bluetooth or Wifi ready monitor

    Necessity is a bit stronger word than required. I am currently still living in an area within the service of APS. Things like running water, limitless access to electricity and other creature comforts become luxuries when one forsakes common technology and burros into primitive culture. It is...
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