1. P

    Blown Inductors on a Dell Laptop Board

    Hello everyone, first thread here, I have cracked open a Dell XPS13 9350 that I've diagnosed the motherboard being dead. It's my mothers old laptop. I figured this would be a good chance to learn more about the micro parts on a board. Upon taking it apart, I found some blown inductors (atleast...
  2. E

    Chaos generator MOSFET, how does it work?

    The circuit in the picture is a chaotic generator formed from MOSFETs as opposed to op amps from the usual chaos generators. How does it all work exactly? Whilst I have knowledge of how MOSFETs work and such, the connections etc are hard to understand what they all do completely. In-depth...
  3. D

    Inductor current

    An inductor of 10H has 1omh internal resistance. What is the current through the inductor after 10V is applied for 1 second?
  4. Manish Shamjhu

    Homework help, Derive s11(p) and s12(p)

    Derive s11p and s12p
  5. P

    Finding the Size of Inductor and Capacitor

    Hi, i have calculated the L and C value for filter circuit for Three phase inverter, now i would like to know the size and weight of the filter circuit for the L and C value i have calculated. Can anyone help me on how to do this ? Thank you. Raj
  6. John Czerwinski

    DC Boost Converter (5v to 12v using LM2577) not powering load

    I'm sure I'm missing something very fundamental here, but I've built a boost circuit on a breadboard (see attached schematic) to convert 5v to 12v using an LM2577-adj. I want to power a 12v PC fan (rate at 12v at .06A) as the load. The LM2577 seems to work fine, as I'm measuring 12v. The fan...
  7. H

    finding the number of turns for my inductance.

    Hey guys, so i've calculated that I need an inductance of 0.150mH for my inductor. However, I'm trying to figure out the number of turns I need for it. # I've got an answer of 24 turns but this doesn't feel right to me. Could someone double check my calculations? below is the datasheet for the...
  8. J

    Trying to ID this "inductor"?.

    It is been used as a ballast for a 120v UV Ligtht. It has only two cables, one cable is connected to power source and the other to one of the 4 prongs of the UV bulb. the second prong of the bulb is connected to power negative cable, the remaining two prongs of the bulb are connected to the...
  9. P

    measure,Identify ferrite bead smd and inductor smd

    Hi guys, decided to ask. maybe someone came across this, but I did not find how to identify a damaged element. In general, I need an element identification. since many manufacturers of SMD components it is very difficult to identify them without special expensive equipment. The circuit...
  10. N

    Confused over an easy plot about inductor current

    Need some insight about a plot found in the Fundamentals of power electronics second edition book. I don't really understand why it is written like this. Left side \( \frac{I}{V_{g}/R} \) can be rewritten to \( \frac{1}{D'^{2}} \) so it is basically "just" duty cycle. The book states that the...
  11. kubeek

    Great tool for transformer calculation

    Hi guys, I just found a great website that lets you easily calculate the parameters of a transformer or inductor, given the core parameters and material. I was trying to choose some suitable core to make a flyback for geiger counter, and this really came handy instead of doing a bunch of...