Search results

  1. S

    400 Hertz at 120 V

    I suppose in most applications a 60Hz Xfmr would work ok at 400Hz. My interest perks-up when somebody specifies an application, like 'driving a vibe meter'. What's the application, or is this just some test set-up? If you use a 60Hz Xfmr at 400Hz, I'd make sure I didn't exceed the Xformer input...
  2. S

    Cheap Induction Heat Units

    I don't know your application, but I've never worked on an induction heating unit that used more than a single heating element. That might mean there's a practical reason why it isn't done. (interference maybe with one another). Maybe someone else here can offer some insight. I could be wrong...
  3. S

    400 Hertz at 120 V

    I'd check military surplus sites. 400Hz, as you probably know, is what military aircraft operate at. There's a lot of military surplus ground test gear designed for use at 400Hz out there. (And typical nobody hobbyists have no use for a 400Hz transformer, so they're not in-demand items).
  4. S

    Cross reference lists

    I don't know how you're finding this great cross-references, but I'm glad you do. Thanks
  5. S

    Comedy Thread

    I was there, done that. I even had the same haircut. Never even dreamed at the time I was going to be replaced by a machine.
  6. S

    Cross reference lists

    I know of several from matthieu benoit, who has done a fine job posting some very helpful cross references. He was on this site once years ago apparently checking ElectronicsPoint out, for a very brief time. I tried to message him to thank him for the work he's done, but he was in and out of...
  7. S

    Cross reference lists

    Ooooo, I really like this latest cross-reference you found. Very complete reference for the older parts I'm often trying to find the equivalents for. Thanks again.
  8. S

    Cross reference lists

    Thanks, maybe you can add them to the 'Resources' section of the forum?
  9. S

    My electronics workshop

    Maybe an ESD mat to work on (& wrist strap). I can't do much of anything anymore without one of those adjustable lighted magnifiers. Got your shop chemicals? Spray can contact cleaner, some Q-tip cotton swaps and the like. After you get all this set-up, do you have any money left for things to...
  10. S

    Where is the problem?

    I doubt it's the problem, but just to be sure: Not all diodes have the same operating current. You can test both LEDs out of circuit and see them work fine, but what is your circuit current through that green LED, and what is the operating current of that green LED? After checking the obvious...
  11. S

    Electric pump to dispense the hand sanitizer gel

    There are probably some on the market already, but I'm wondering why you want an electric pump? If it would be because you don't want to touch the mechanism for dispensing, then you'd need a non-contacting sensor of some type also, to activate the electric pump. Most stores sell the bottles with...
  12. S

    How do ESD monitors work?

    Alright, sounds like you're asking the technical question about how the ESD monitor circuitry tells the user the wristband is properly grounding the user. (The monitor stops signaling the alarm). Refer to Harald Kapp's previous post at 5:17am 16APR20. People ask for free information here, and...
  13. S

    Question CR2032 battery

    I'm with dave9 & Audioguru. I suppose it's possible, but I'VE never seen an Energizer CR2032 leak. I will mention this however: I always bought Energizer batteries from brick and mortar US stores, no problem. I got stupid and bought a couple packages of 'Energizer' rechargeable NiMH AA...
  14. S

    Need a diode ID for an LED lamp circuit

    Like Fish4Fun said toward the end, something probably caused that diode to fail (excessive current from elsewhere). Even though you may not see any other damaged components, I would suspect another component in the circuit failed, resulting in a fried diode. Good luck with the repair attempt.
  15. S

    Transistor Identification help requested

    Want to try supplying the characters written on the transistors?
  16. S

    How do ESD monitors work?

    zibilytou, I believe you are asking a basic question(?) Why the ESD monitor alert energizes. If you are wearing the wristband, or touch the wristband to a ground, no alarm. (Because the wristband is grounded) If you are not 'grounded' while wearing the wristband, or the wristband is not touching...
  17. S

    Kid's battery operated car stopped moving

    I'm thinking along the same lines as Bluejets and Martaine2005, maybe that switched with the 3 wires was replaced with an incorrect equivalent(?). I will mention though, having worked on my grandkids cars, that after figuring-out if your switch is the actual problem or not, if you STILL have a...
  18. S

    How do ESD monitors work?

    ESD straps are to ground the user, draining away static build-up on the person wearing it. An ESD monitor is designed to tell the wrist-band wearer when he/she is not grounded.
  19. S

    COVID-19

    Glad you're recovering *steve*. Sounds like it was a pretty bad experience.
  20. S

    COVID-19

    08APR20 US Death Toll from Covid 19 = 14,200. Here in the State of Arizona = 80. The female doctor at President Trump's daily news conference says anybody that dies WITH Covid 19 positive, IS being listed as dying from Covid 19. Apparently anybody here with a serious medical condition...
View older results
Top