Search:

Type: Posts; User: Akanimo

Page 1 of 19 1 2 3 4

Search: Search took 0.03 seconds.

  1. Replies
    8
    Views
    400

    Closed: Re: Subtract two dc voltages.

    Although this, I believe, is not what the OP wants, I believe it is an oversight.

    The V probe of the meter should be connected to the +ve of the 9V battery and the COM probe of the meter to the...
  2. Closed: Re: Difference between Differentiators and Comparators

    Hi,

    In addition to what srizbf said, a differentiator detects transitions of the input signal. It produces a spike at the output when the input transitions.

    The comparator output switches from...
  3. Replies
    23
    Views
    696

    [SOLVED]Closed: Re: Failing to program ALTERA Max 7000A

    It's not very clear how you made the connections to the DIP40 board. The missing pins may be Vcc and GND but the connections from the pins of the DIP40 board to the pins of the PLCC socket are not...
  4. Replies
    23
    Views
    696

    [SOLVED]Closed: Re: Failing to program ALTERA Max 7000A

    The board you are using, it is PLCC44 to DIP-what? Is it PLCC44 to DIP44 or PLCC44 to DIP40?

    That red wire connected to the JTAG connector doesn't look cool.
  5. Replies
    23
    Views
    696

    [SOLVED]Closed: Re: Failing to program ALTERA Max 7000A

    You just showed the USB Blaster in post #7 instead of the header. If you do not have a header then it's possible you may have flipped some pins by mistake. You may have to confirm this again.

    - -...
  6. Replies
    23
    Views
    696

    [SOLVED]Closed: Re: Failing to program ALTERA Max 7000A

    Can you show a picture of your JTAG header?
  7. Replies
    23
    Views
    696

    [SOLVED]Closed: Re: Failing to program ALTERA Max 7000A

    Hi,

    See https://hackaday.com/2016/02/04/a-better-way-to-plug-a-cpld-into-a-breadboard/ for a working connection diagram.

    - - - Updated - - -

    Also, close the warning and Hardware Setup popups...
  8. Closed: Re: Turbine Backup Overspeed Pickup Probe Extraction Tool

    Thanks Brian and ads-ee.

    Things have been worked out.
  9. Closed: Gas Turbine Backup Overspeed Pickup Probe Extraction Tool

    Hello everyone,

    Please what is the tool for extracting Backup Overspeed pickup probe from Solar gas turbines called?
  10. Replies
    9
    Views
    384

    Closed: Re: 230V AC to 5V DC push button interfacing

    Hi,

    If you have a flyback converter already then you would not need the bridge rectifier that you still have. You can use the output DC to generate and feed the pulse to the MCU with your switch.
  11. Replies
    9
    Views
    384

    Closed: Re: 230V AC to 5V DC push button interfacing

    Hi,

    You'll need a proper power supply for your design. An offline flyback is a good option for low-power applications. You can buy a duly rated one off the shelf.

    Now taking a look at the right...
  12. Replies
    5
    Views
    403

    Closed: Re: Rotary encoder physical dimensions

    Yes they are. I just found the attached photo from another seller's page. They are a group of a lot of sellers sharing the same pattern of presenting specifications.

    154675

    For the encoder...
  13. Replies
    5
    Views
    403

    Closed: Re: Rotary encoder physical dimensions

    Okay. Please may I ask why 5?
  14. Replies
    5
    Views
    403

    Closed: Rotary encoder physical dimensions

    Hi everyone,

    Attached are pictures of an encoder that I just acquired. The package does not come with a flex coupling nor a mounting bracket. Attached too is a picture of the specifications as...
  15. Replies
    2
    Views
    179

    Closed: Re: Very accurate analog comparators

    Hi,

    Use a low offset voltage comparator and precision resistors. LM393 has +/-3mV Voffsetmax specification. Maybe you should run a test with it.
  16. Replies
    18
    Views
    850

    Closed: Re: Is the transistor calculation is right?

    An hFE of 10 gives about 3.3W power loss at the base resistor. That's not good. The goal is to get the transistor to always stay in saturation. Normally you need to use an hFE considerably lower than...
  17. Replies
    18
    Views
    850

    Closed: Re: Is the transistor calculation is right?

    You said in post #8 that your load is rated for 6V, 5A? Datasheet specifies Vcesat of 2.8V for the transistor. That means you need a source of (6 + 2.8)V = 8.8V. The 8V you provided may be adequate...
  18. Replies
    18
    Views
    850

    Closed: Re: Is the transistor calculation is right?

    Hi,

    Do not use Vcc. Use Vbb so that it would represent your IC output pin voltage, for instance.

    Rb = (Vbb - Vbe)/Ib
    Ib = Ic/hFEsat

    hFEsat should be of low value, considerably lower than...
  19. Replies
    18
    Views
    850

    Closed: Re: Is the transistor calculation is right?

    Yes. I see same. The OP needs a supply of at least (9+Vcesat) Volt. I would go for a higher voltage source though to allow the load resistance to limit the collector current.

    From the look of...
  20. Replies
    34
    Views
    1,567

    Closed: Re: ELECTRICAL AND ELECTRONICS Instrumentation

    Yes, because in phase the forces aid each other and at 180 degrees out of phase the forces are in direct opposition, at all times.



    No, vector addition works in all cases including 45 degrees....
  21. Replies
    34
    Views
    1,567

    Closed: Re: ELECTRICAL AND ELECTRONICS Instrumentation

    I did not say that the simulation contradicts all the points made previously. I acknowledge the fact that vector addition is correct in all cases as mentioned by Easy peasy. I am just trying to...
  22. Replies
    34
    Views
    1,567

    Closed: Re: ELECTRICAL AND ELECTRONICS Instrumentation

    Actually, this was saying that differences in phase angles between combined waveforms affect the resultant RMS value.
    See attached simulation result for more information.

    154616

    154617
    ...
  23. Replies
    2
    Views
    296

    Closed: Re: How to use TL431 Model in LTSPICE

    Hi,

    Please elaborate on your question. It's a little bit too vague what you want specifically.
  24. Replies
    34
    Views
    1,567

    Closed: Re: ELECTRICAL AND ELECTRONICS Instrumentation

    I went a step further and I found out that it is not only frequency that determines the RMS value for such combination of waveforms. I found out that differences in phase angles between the waveforms...
  25. Replies
    34
    Views
    1,567

    Closed: Re: ELECTRICAL AND ELECTRONICS Instrumentation

    Hi Barry,

    Also take a look at my LTspice simulation result of Post #13. In that simulation I added both currents as you can see in the simulation waveform and calculated the RMS value of the sum....
Results 1 to 25 of 471
Page 1 of 19 1 2 3 4