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Type: Posts; User: KlausST

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  1. Closed: Re: Identify capacitor with marking code L62 104

    Hi,

    Of course. 100n.

    10 x 10^4 = 100,000 pF.

    Maybe it's a bit late today for me.

    Klaus
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    Closed: Re: NodeMCU ESP-32S pitch

    Hi,

    There are datasheets... telling you the measures.

    Klaus
  3. Closed: Re: Identify capacitor with marking code L62 104

    Hi,

    I agree with: "104 means 10,000 pF" = 10 x 10^4 pF (can be found million times in the internet)

    But it's 10nF then...

    Klaus
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    Closed: Re: Stable PWM during Voltage Loss

    Hi,

    I'm confused, too.
    I also don't understand, why an FPGA comes into play...and boot time of it, and where the 5A are...

    From post #1:

    ...for this a 100uF capacitor should be well...
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    Closed: Re: Stable PWM during Voltage Loss

    Hi,

    Why do you say "big capacitor"? .. and what does it mean?
    Physically big, or big capacitance value?
    What are your requirements?

    There is a relatively simple formula: delta_V = time ×...
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    Closed: Re: Hand soldering a 6x6mm QFN (28pin)

    Hi,

    Yes, homebrew soldering with a stencil, solder paste and a heating plate.

    But if you are asking about a soldering iron with a single tip....it will be far more difficult and unreliable....
  7. [SOLVED]Closed: Re: LM741 Amplifier not working with IR2110 IC [PROTUES]

    Hi,

    The arduino output is "digital", and so is the IR2110 input.
    But the Opamp is an "analog" circuit.
    Don't mix analog and digital this way.

    The circuit simply is not suitable.

    Why do you...
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    Closed: Re: Source of resistors without buying bulk

    Hi,

    Farnell for example sells resistors.
    But without knowing the package....we even don't know whether you want THM or SMD...

    Klaus
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    Closed: Re: Problem with my echo circuit using PT2399

    Hi,

    My idea:
    The echo is inverted (for low frequencies).

    Klaus
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    Closed: Re: pic16f877a + spi + 93LC46A-I/OT EEPROM

    Hi,

    "SCL" usually is an "I2C" pin, not an "SPI" pin. Please check this.

    And for the rest: How do you think we can help you without showing your code and schematic?

    Klaus
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    Closed: Re: AD7730 not calibrate

    Hi,

    Post a schematic and where you connected the mV generator and where you read the values.
    Also, power supply, reference...frequencies...and all other informations that are important to run the...
  12. Closed: Re: Choice of capacitors for DC blocking and 3A AC?

    Hi,

    I see no problem.

    Don't use Xc for power dissipation calculation, only ESR....which should be much less than Xc.

    Fir detailed informations I recommend to consult the datasheet.

    Klaus
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    Closed: Re: AD9288 is not working in Proteus

    Hi,

    In real world you need:
    * VCC capacitors
    * capacitors at analog inputs (my recommendation)
    * to connect all inputs (even the unused ones) with useful signals
    * current limiting resistors...
  14. Closed: Re: can triacs rapidly switch AC into a transformer

    Hi,

    The biggest problem is that triacs, thyristors, SCRs can't be switched OFF like transistors.

    Once they are triggered they stay ON until current goes to zero.

    Klaus
  15. Closed: Re: Modbus Communication require enhance stability

    Hi,

    The first thing you should do is to debug your system....to find the cause of the problem.

    There is:
    * the sensor hardware
    * the sensor bus
    * the bus communication
    * the calculation...
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    [51]Closed: Re: SRAM WR pin is not anabled

    Hi,

    There are two primary causes: hardware or software.

    * hardware: not wired correctly
    * software: the software you use is not accessing the SRAM

    How can we know without useful...
  17. [General]Closed: Re: Ideal NOR Flash memory specifications for a Set Top Box Application

    Hi,

    I don't think there is an "ideal NOR Flash".

    The usual way is to first decide your requirements, then do a search for a suitable device.

    Klaus
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    Closed: Re: ELECTRICAL AND ELECTRONICS Instrumentation

    Hi,


    I agree, the equation gives current ... no voltage....no restor needed to calculate the current.

    But "2A" is the DC component, it's the RMS current at zero frequency and has to be treated...
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    Closed: Re: ELECTRICAL AND ELECTRONICS Instrumentation

    Hi.

    The voltages should be added by squaring them beforehand then take the square root.

    I see 2V DC and
    A sine wave with 4Vp which is 2.828V RMS.

    [Edit: the following calculation is wrong,...
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    Closed: Re: Coin Slot acceptor Timer using PIC16f84a

    Hi

    I'd use a counter variable with smaller granularity.
    Maybe one second.
    Add 60 seconds for every inserted coin.
    As long as the counter value is not zero: switch ON the output and decrease the...
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    Closed: Re: To develop 3D printer in PIC controller

    Hi,

    G Code is rather simple. Almost human readable. The description of the code is available in the internet.

    But in my eyes parsing the G code is the simplest part of your code. Controlling...
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    Closed: Re: What do you mean by Predictive FIFO?

    Hi,

    we need some context.

    Where did you read about it? Give a link.

    Klaus
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    Closed: Re: To develop 3D printer in PIC controller

    Hi,

    For sure you can "develop" you own software for any microcontroller you like.

    But maybe you mean "compile":
    Then it may or may not be possible. It depends on how the source code is...
  24. Closed: Re: 32 bit left shift of a longint variable does not work

    Hi,

    I'm not a programner, but I often need to read some code.
    And here I'm always confused with the varable declarations.

    When you say "integer" variable ... are you sure it is a signed_int_32...
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    Closed: Re: Power On Self Test in Automotive

    Hi,

    What´s the alternative?
    Doing memory test continously? .. And all other tests? like auto calibration routines...
    ..and what if the test has influence on the running system..because it...
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