Search:

Type: Posts; User: BradtheRad

Page 1 of 20 1 2 3 4

Search: Search took 0.11 seconds.

  1. Replies
    13
    Views
    2,294

    Closed: Re: Wrong output in HSpice

    Sorry, I know nothing about this. HSpice ought to have a help number, if it's that prominent.

    Surface thinking might lead you to tell the boss 'his choice' of software gives you problems, but...
  2. Closed: Re: Circuit don't work in Microcap (555-based class-D)

    Simpler yet. Start with an ordinary relaxation oscillator built from a single op amp. (Normal output is AC square wave.)

    Turn it into a class D amplifier by applying signal at strategic location....
  3. Replies
    13
    Views
    2,294

    Closed: Re: Wrong output in HSpice

    Embarrassing for someone but remember you are not the one responsible.

    About computer programs there's a saying: 'If it's difficult to use it's not the user's fault, it's the programmer's fault.'
  4. Replies
    7
    Views
    354

    Closed: Re: How "repair" voltmeter gauge?

    Arrange the zener diode in series so it subtracts about 7.2 volts from the supply. This creates an expanded scale meter.
    Apply 8V, needle deflects a little.
    Apply 16V, needle deflects all the way...
  5. Replies
    13
    Views
    2,294

    Closed: Re: Wrong output in HSpice

    Although I lack hands-on experience with HSpice, I get the idea that software developers like to change things around from one version to the next. Perhaps it's their way of gaining continued revenue...
  6. Replies
    3
    Views
    197

    Closed: Re: cooler master silent prp 500w pc psu

    From internet search your unit appears to be a combination power inverter & battery charger, correct?

    Since you have 330 vdc, what is your power source, a battery or is it house voltage? In other...
  7. Replies
    13
    Views
    2,294

    Closed: Re: Wrong output in HSpice

    For further assistance it may require someone familiar with your setup and your simulator. Example, 'Unknown file error' may have to do with the way HSpice is installed on your computer, rather than...
  8. Closed: Re: looking for a local supply in southern california

    I've purchased power adapters from discount mail-order suppliers such as All Electronics. Some as low as 99 cents (decades ago). Assorted brands. Surplus from abundant sources. Most appear new.
  9. Closed: Re: Circuit don't work in Microcap (555-based class-D)

    The principle is to vary duty cycle of pulses (PWM) depending on voltage of input signal.

    Here is a class D amplifier, starting with a triangle wave generator (found in the Circuits menu of...
  10. Replies
    7
    Views
    392

    Closed: Re: Transformer coupled Class A amplifier

    Does your single-ended amplifier have a capacitor somewhere in the output stage? If combined with an inductor (or transformer), then it's possible for LC resonant action to generate unexpected large...
  11. Closed: Re: Opinions about plagiarized paper on an academic website

    Many of these 'free' websites are suspect as carriers of malware. Not to say it necessarily applies here, but the attraction does provide a means for parties known and unknown to attach malware to...
  12. Closed: Re: Opinions about plagiarized paper on an academic website

    You're correct on the face of it. However it would take more research to get the entire story.

    * Example, to find out whether the original author gave permission for his work to be included among...
  13. Closed: Re: Stuck at simulations of Amplifier in LTSpice

    I guess you're aware gain comes from a transistor?

    What amount of gain do you have now?
    What did you do to get that amount?
  14. Replies
    7
    Views
    392

    Closed: Re: Transformer coupled Class A amplifier

    When you turn on the transistor fully, it provides a low-resistance path to a supply rail, causing that supply rail to influence the output.

    When you turn off the transistor, it is high...
  15. Replies
    6
    Views
    451

    Closed: Re: X-rays on projection CRT

    Once upon a time every town had a TV repair shop. Technicians worked on tv's all day long. They were close to the screen, and close to the tubes.

    I asked one of them about exposure to rays from a...
  16. Closed: Re: Doing electronics on an office carpet (non ESD)

    Although he's not following the safest procedure...
    Sooner or later any electronic device is liable to static charge exposure, when you think about it.

    There's no comfortable way to critique...
  17. Closed: Re: Infection Simulator reading file problem cpp

    The code does a similar job as a 'robust' input routine. The purpose is to accept user keypresses, then convert ascii characters into proper data consisting of words and numbers.
    You must ensure...
  18. Closed: Re: Infection Simulator reading file problem cpp

    Perhaps you mean you want to parse long strings of alphanumerics? Then you must examine each character in sequence. Begin each datum as a null string.

    Build each datum by appending digits. When...
  19. Replies
    13
    Views
    2,294

    Closed: Re: Wrong output in HSpice

    Is the load a capacitor by itself? That can give a simulator trouble.

    Try changing the load to a resistor. Compare the simulator results. See if the problem goes away.

    Then change the load to...
  20. Closed: Re: Covergance Problem in Transient Bias Point Calculation

    10.00 GA indicates giga-Amps, correct? That's a very large value. Try putting resistors in series with capacitors. Your schematic has the power supply feeding a capacitor directly. The simulator...
  21. Closed: Re: Infection Simulator reading file problem cpp

    Create arrays:

    entity(x)

    data_string(x)

    Whether_infected(x)

    Where x = 1 to amount of entities.
  22. Closed: Re: Class D amplifier circuit how to make

    Run a 555 timer IC to generate a pulse train.
    Apply varying voltage to pin 5. This alters duty cycle.
    It's the makings of a class D amplifier.

    159514

    The LC network acts as a low-pass filter,...
  23. Closed: Re: Determining Value of Capacitor Between PV Panel and DC-DC Convertor.

    Just to pull a figure out of a hat. I don't know whether 10V 0.5A is a realistic MPPT. Of course the converter must be designed to operate on parameters suited to the real PV panel's capabilities.
  24. Closed: Re: Determining Value of Capacitor Between PV Panel and DC-DC Convertor.

    Although a capacitor helps to smooth input current, consider making a complete LC filter.
    Say the most you can extract from your PV panel (at MPPT) is 1/2 A continually.

    The buck-boost converts...
  25. Closed: Re: How to adapt (normally) PCI Express x1 to work in PCIe Mini Slot

    Really positive news. Huge change from your previous (erased) post, huh? That's how it is with these newfangled computerized devices... They act in cryptic ways, and sometimes even perform a miracle.
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4