Maker Pro

Recent content by Mike Lansing

  1. M

    Devices Happy to Have Left the Lab

    Antipode to Electronics Point Newsletter, 24 Jan 2019 and the article '3 Implantable Devices That Should Have Never Left the Lab' is this welcome human interest story about Stargardt's disease: [Mod edited to remove an apparently unrelated link ??]
  2. M

    Solenoid Driver Circuit Without Using Arduino

    While not having had the time yet to shop for parts for the basic solenoid test, we urge electronics buffs and experimenters to consider the didgeridoo trajectory for a switching harness. Whereas Roland and EWI MIDI controllers use logic gates to decode sax switching logic, a mechanical approach...
  3. M

    Solenoid Driver Circuit Without Using Arduino

    Calculations of the duty cycle, then, could be used to find the "cost" in electrons of each musical piece relating to recharging the batteries. Would this not be possible as long as the time of the musical piece is known, and while using the (standard) operating temperature of calculations @ 35...
  4. M

    Solenoid Driver Circuit Without Using Arduino

    Thanks for the reply. There are reasons, then, for bringing an actual electronics engineering student (or more students) into this project, not only for my learning curve. Having picked up an electronics book found on a free bench in the U.S., Fundamentals of Electric Circuits, the front cover...
  5. M

    Solenoid Driver Circuit Without Using Arduino

    Are the Uxcell parameters an equivalent ratio of values to the Pease circuit? Or cannot that be determined yet because the drop-out current is unknown? I am trying to understand the physics (as Pease and yourself) of drop-out current, flyback, etc. I can check some "ratios" via a calculator...
  6. M

    Solenoid Driver Circuit Without Using Arduino

    Thanks for your concern. The wiring must be wrapped from the point of attachment at the instrument, to the synthesizer. I chose 30AWG so as to get used to working under magnification, which may be helpful for the quality of the finished switch at the instrument end: the desire to keep the...
  7. M

    Solenoid Driver Circuit Without Using Arduino

    Thanks for your reply. It was hoped that solar powered AAs would eventually be incorporated, and these placed in banks to accommodate solenoids 1-6, another bank for 7-13, etc, which now seems problematic because when a chord is played, it is often held for some time, so the Pease circuit's...
  8. M

    Solenoid Driver Circuit Without Using Arduino

    Since not having done much about this problem since 1987, there's need to find out about sources for components for this circuit as well as much review of the basics, such as perhaps up to 6, 8 or more solenoids being on at the same time, when to split the battery banks, etc. Thanks for the replies.
  9. M

    Solenoid Driver Circuit Without Using Arduino

    Last night, one AA pulled in the solenoid with enough g's to activate the switch. A measurement shows the Uxcell coil at about 6 ohms. The plunger of the solenoid is separated from the two parts of the switch by a small piece of popsicle stick and the solenoid itself is wrapped onto another...
  10. M

    Solenoid Driver Circuit Without Using Arduino

    Before I knew of your suggestion of three AAs, I first tried a single AA cell and the solenoid worked, though after some repetitions, it stopped working altogether. It can work with 3 AA's in series, though the force test has not been done on the actual switches because of concern for the safety...
  11. M

    Solenoid Driver Circuit Without Using Arduino

    Comments on this solenoid state that it's weak, though I think 40g can operate the membrane switch. It would be desirable to understand the equations from the start rather than opt for being a purchasing agent. However, 20 of these have already been purchased, so I'll tend to deal with the cards...
  12. M

    Solenoid Driver Circuit Without Using Arduino

    There does not seem to be a data sheet for it at Amazon, and it's a ridiculously complex URL to transcribe onto this thread. The Amazon page says: 'Uxcell a14092600ux0438....' Once calculations are more clear, it should be no problem to divide up the AA battery banks, for instance, if there are...
  13. M

    Solenoid Driver Circuit Without Using Arduino

    https://www.electronicdesign.com/analog/what-s-all-solenoid-driver-stuff-anyhow
  14. M

    Solenoid Driver Circuit Without Using Arduino

    Bob Pease page on 12 v solenoid driver circuits seems to be a good model. What's All This Solenoid Driver Circuit Stuff, Anyhow? [Mod edit: dysfunctional link removed. Correct link see next post] Working with multiple Uxcell 4.5V open frame linear mini push-pull type solenoids at 40g/2mm, the...
  15. M

    Saxophone Switching Logic

    The stridulation that produces frequencies of the insect chirp are an example of the becoming-space of time and the becoming-time of space. Curiously, the International Edition we have quoted from states on the back cover: "This book cannot be re-exported from the country to which it is sold by...
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