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  1. AnalogKid

    Controlling AC contactor by NC & NO push button

    The two switches could be at opposite ends of a looooooong conveyor belt. ak
  2. AnalogKid

    Low voltage drop diode

    The two diodes thermally track very well. It is safe to combine them in parallel for a max total current of 15 A. ak
  3. AnalogKid

    Function of capacitors in Royer oscillator

    Same reason you took the time to post images you knew were incorrect - ? ak
  4. AnalogKid

    Function of capacitors in Royer oscillator

    Please re-post the photos with the correct identifiers. It should help the discussion if we know what we are looking at. We know nothing about the design or construction of your transformer, but the circuit you posted is not a Tesla coil. In a Royer power oscillator, the transformer is not...
  5. AnalogKid

    Low voltage drop diode

    To Wally's point, Linear Technology (now a part of Analog Devices) makes controller chips that turn a power MOSFET into a very low Vf diode. More complex and expensive than a big-ass Schottky diode, but 2x-10x more efficient. ak
  6. AnalogKid

    Function of capacitors in Royer oscillator

    And useless.
  7. AnalogKid

    Reversing polarity on push of a button

    This thread died out over three years ago. The right way to do this is to start your own thread with your own question and details. You can link to this thread for context/history if needed. ak
  8. AnalogKid

    Function of capacitors in Royer oscillator

    The conditions of each scope shot are the same: 30 nF and 330 ohms. ak
  9. AnalogKid

    Bench power supply to PCB connector

    OK, that limits your choices to only 0.314 jillion options. What cable technologies do you have? Crimp pins pushed into a body? Insulation displacement? Solder cup? Also, some very common connectors have a surprisingly short lifetime in terms of insertion/extraction cycles. What kind of...
  10. AnalogKid

    Bench power supply to PCB connector

    Your question is missing so much information that it is difficult to know where to begin. The answer you deserve is : Simple; use wires. Beyond that, let's start with the basics: What power supply? What pc board? What voltage? What current? Physical limitations - height, depth, cost...
  11. AnalogKid

    Op amp comparator troubles

    This is a minor nit for your circuit, but might be an issue in some future design. At U30B, disconnect the comparator pin 7 from GND. In general when tying off unused elements in a multi-element component (logic gate, opamp, whatever), you should leave unused outputs floating. For some...
  12. AnalogKid

    Inverting a modulated signal (OOK).

    You don't give a part number for the NAND gate, so we don't know if it has hysteretic inputs. And, usually there is a resistor in the feedback path for more control and stability of the oscillating frequency. Beyond all of that, the oscillator probably is producing a symmetrical output, which...
  13. AnalogKid

    Fluorescent replacement LED tupe light connections

    A while back I did a project for the Australian navy. Where are you located? ak
  14. AnalogKid

    Fluorescent replacement LED tupe light connections

    The light pans are built into an acoustic tile drop-ceiling. the problem is that the pans were installed first, then the ceiling runners were installed under them. The pans sit on the runners just like the tiles, but are not flexible. Then cannot be removed without first removing large...
  15. AnalogKid

    Fluorescent replacement LED tupe light connections

    I did not say that LED tubes require a ballast. In fact, I said exactly the opposite. Separate from that, you misread the sentence you quoted. I know that an inductive ballast is not required. That is why I'm removing and recycling a18 of them. In your #2, you mention hiring an electrician...
  16. AnalogKid

    Fluorescent replacement LED tupe light connections

    Not for me. The vast majority that say they will work by dropping into a ballast fixture require that it be an electronic ballast. A much smaller number will work with some newer magnetic ballasts, but nothing as old as mine. The only ones I've found that are true drop-ins for me are some GE...
  17. AnalogKid

    Fluorescent replacement LED tupe light connections

    After almost exactly 50 years, the ballasts in my basement ceiling lights are beginning to fail. It looks like I've put off converting them to 4-foot LED tube lights as long as I can. Very few available options will drop in and work with *old* magnetic ballasts with zero wiring mods. Rewiring...
  18. AnalogKid

    Adding capacitor to wireless power transfer circuit. Need guidance.

    Nice. What is the source for that chart? ak
  19. AnalogKid

    Can anyone create a Gerber file of the attached sloppy schematic?

    The title of this thread says "Gerber file". What do you mean by that? What is the use of the file? Typically, a Gerber file is used to produce printed circuit boards. Is that what you want to do? ak
  20. AnalogKid

    Can anyone create a Gerber file of the attached sloppy schematic?

    By Gerber file, do you mean enter your schematic in a CAD schematic program, port the netlist into a pc board layout program, do the layout, and produce production files? If so, please repost the image with the correct orientation. ak
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