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  1. Closed: Re: Laptop RAM upgrade (new RAM doesn't work in RVS slot, but works in STD slot)

    It is crazy if such a complicated model number isn't enough to tell if it must be upgraded with DDR3L or DDR4 RAM.
  2. Closed: Re: Displaying the time parameter using Timer interrupt

    In C code, a number beginning with "0" is an octal number. Octal 0123 = Binary 1010011 = Hex 53 = Decimal 83

    0129 is illegal because there is no digit '9' in octal base.


    Wrong:

    ...
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    Closed: Re: Is such goal achiveable - AVR Soft-Core

    Don't change the compiler. Write an assembler function that can be called from C-code.
  4. Closed: Re: Laptop RAM upgrade (new RAM doesn't work in RVS slot, but works in STD slot)

    For the combination that "works" with a new DDR4 module, can the computer see the memory? I doubt it.

    You should get DDR3L SODIMMs instead.
    Your laptop will not take DDR4 modules.
    ...
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    Closed: Re: Is such goal achiveable - AVR Soft-Core

    It is possible, and maybe useful as a training/learning experience.
    Otherwise, I think it is a bad idea. A "simpler" solution is to create a separate "vga terminal/screenbuffer" block and connect it...
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    Closed: Re: Understanding Skid Buffer Mechanism

    For timing/speed, you don't want a combinatorial path from destination/output "ready" going back to the source/input "ready".
    This means that the "ready" going back to the source/input will be...
  7. [SOLVED]Closed: Re: Ultra low-power timer to make a power saving circuit

    For this application, you should not look at the "active" current for MCU's. Some of them have a low power oscillator that can wake the chip from "sleep" after a certain time. The software can then...
  8. Closed: Mean Well advertisement blocks the whole page

    Sometimes the ad is on both sides and the page works.
    Sometimes the ad is in the middle and nothing works. If I reload the page repeatedly, the page will work after a few tries.
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    Closed: Re: Issues with driving 16x2 LCD

    You delay 500 us but only 500 ns is necessary.

    You should probably also have the delay after setting LCD_EN = 0
    In several places you set LCD_EN = 1 again with no delay.
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    Closed: Re: Off-line Power factor correction

    I agree with Easy peasy.

    The transfer function changes between DCM and CCM, so it is much more difficult to make the regulator loop if both modes are allowed.
    I think it could be possible with a...
  11. Closed: Re: Old capacitor needs replacing not sure what to replace with.

    The small capacitor is 0.005 uF = 5 nF, so 4.7 nF should be a good replacement.

    It must be of type "Y" for safety reasons.
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    Closed: Re: Linux Command to Copy Multiple Files?

    The file names will be exactly as in the "destination_file_list.txt".

    If the file names in the list don't have the .docx extension, you can add it with the "sed" command:


    cat...
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    Closed: Re: Quartus error 12006 'undefined entity'

    What device are you using?
    Are both clock buffer outputs connected to physical pins on the device?
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    Closed: Re: Linux Command to Copy Multiple Files?

    If there is no path in the destination file names, they should go to the current directory.
  15. Closed: Re: Step Down Voltage Circuit at High Frequency (MHz)

    Is this for extracting the data bits in an RFID reader for passive RFID tags?
    In that case I think you only are interested in the changes in peak voltage.
    An envelope detector with AC coupling to...
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    Closed: Re: Linux Command to Copy Multiple Files?

    cat destination_file_list.txt | xargs -n 1 cp source_file

    Edit: the "-T " option for cp isn't needed, so I removed it.
  17. [SOLVED]Closed: Re: Const shows error in sine table of a sine wave inverter code with PIC16F73

    The small PIC processors are not good for C compilers. As an example, they can't read from program memory, so a constant lookup table is made from an "array" of return instructions.
    The indexing is...
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    Closed: Re: How to Measure TCUT1300X01 IC Output

    Verify that you have about 1.8V across R28.

    What voltage do you have across R2 ?
    If it isn't zero when the light is blocked, the R2 value of 100 kOhm is probably too high. I would change it to 10...
  19. Closed: Re: What is the name of this transistor package?

    "PowerPAK" and "PowerFLAT" seem to be registered trademarks, so avoid those names.
    I would go for "VSONP-8". Look at these free footprints for Kicad:...
  20. Closed: Re: Measuring currents in a twin pair of half controlled rectifier

    They have the shunt/current sense resistors connected to "ground" (the common reference point), so by considering current going to ground as positive, the sign of the voltage on the resistor will...
  21. Closed: Re: Measuring currents in a twin pair of half controlled rectifier

    It is a very complicated way to say that the current arrows are drawn in the direction where diode V4 and thyristor V2 don't conduct, which means that the current must have a negative value.
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    Closed: Re: ESP32 (WROOM-32D) ADC linearity

    Do your tests again, with the A/D-input mux set permanantly to the right channel.
    In a project with a PIC microcontroller I got some charge transfer between the input channels when going directly...
  23. Closed: Re: Configuring ICE40 FPGA directly from ESP32 uC rather than using dedicated flash I

    Yes, it is common to do the configuration from a microprocessor.
    In your case, it seems to be the best solution.

    Use the "Slave SPI" mode.
    ...
  24. Closed: Re: CCS/TMS320F28069M: Microntroller is getting hot while debugging the problem

    Since you have the same problem with the Launchpad board, I guess that you have incorrectly programmed one or more of the digital I/O signals as outputs.
    If a pin is configured as an output when...
  25. Closed: Re: How to assign bit values at once to different port pins of different I/O ports?

    I suggest that you do it with a function. Call it set_leds(uint8_t led_bits) or similar. The function can easily extract the bits for each output port.
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