Search:

Type: Posts; User: KlausST

Page 1 of 20 1 2 3 4

Search: Search took 0.09 seconds.

  1. Closed: Re: Embedded project needs devices which can work continuously at +125 degree C

    Hi,


    No problem. Itīs just useless.

    Klaus
  2. Closed: Re: How to measure current with a digital oscilloscope?

    Hi,

    How Iīd do it: Resistor
    I canīt see why you canīt use it. Tell us more about it.

    alternatively:
    use a current probe.

    Klaus
  3. Replies
    2
    Views
    45

    Closed: Re: 3.7V lithium ion battery charger

    Hi,


    Please keep in mind: The generated heat will always be the same. LM317 with / wihtou pass transistor, or any resistor solution or any other linear solution.
    --> You will always need the...
  4. Replies
    15
    Views
    235

    Closed: Re: Troubles with latched counter

    Hi,


    I didnīt go through the complete thread.

    But it seems you are doing some frequency measurement.
    For this you use a "gate" time of 100us.

    If so.... you could simply multiply the...
  5. Closed: Re: Embedded project needs devices which can work continuously at +125 degree C

    Hi,



    No, because the HC138 outputs are push/pull and never high-Z.

    Klaus
  6. Replies
    3
    Views
    63

    Closed: Re: Voltage Drop Issue across Diode Bank.

    Hi,

    Mind: itīs not (like expectable) "Max forward voltage vs forward current"
    it says: "max. forward current vs forward voltage".

    It is the other way round..

    --> max current for a given...
  7. Closed: Re: Stepper motor doesn't have a brand or model number!

    Hi,



    I canīt see how you want to connect it nor how it can work. Can you draw a schematic?

    Klaus
  8. Replies
    3
    Views
    63

    Closed: Re: Voltage Drop Issue across Diode Bank.

    Hi,

    I assume you did not read the diodeīs datasheet.

    According your measurement you get 3V across 30 Ohms --> 0.1A.

    Now use Figure 7 of the datasheet, 25°C chart at 0.1A --> it shows about...
  9. Replies
    3
    Views
    103

    Closed: Re: Opamp slew rate measurment

    Hi,


    Instead of "somewhere" I recommend to look for such informations at the OPAMP manufacturers. They write the specifications and they can tell how to verify those specifications.

    Also many...
  10. Replies
    7
    Views
    100

    Closed: Re: Choice between Buck and Regulator

    Hi,

    There are overvoltage protection devices as well as overvoltage protection circuits. Just do an internet search.

    My recommendation still is: Use a buck regulator with appropriate input...
  11. Replies
    5
    Views
    181

    Closed: Re: Is Raspberry Pi is better than Arduino?

    Hi,

    Raspberry Pi is a computer. There are different types. If you want to compare it, then you should give the exact type.

    Arduino is an IDE. It is no computer, thus it can't be compared with a...
  12. Replies
    7
    Views
    100

    Closed: Re: Choice between Buck and Regulator

    Hi,


    --> the part does not need 5V. It may be supplied with 3.3V.

    Klaus
  13. Closed: Re: Stepper motor doesn't have a brand or model number!

    Hi,


    If I understand correctly, then you don't have any specification of the motor.
    --> What makes you think that it is rated for 12V?

    If the motor is getting too hot, then obviously the...
  14. Replies
    7
    Views
    100

    Closed: Re: Choice between Buck and Regulator

    Hi,

    Your informations are confusing.


    The max. rated input voltage of a buck converter does not depend on output voltage. (unless you use different ICs).

    If you use are talking about...
  15. Closed: Re: Circuit for NPP-301A 100PSI IC (Pressure sensor) combined with MAX1472 RF Transmi

    Hi,

    Your question is too general.
    We can't design all the apllication for you (and we don't want to).

    --> draw a flow chart.
    Divide your application (problem) into smaller units
    Try to solve...
  16. Replies
    4
    Views
    146

    Closed: Re: PIC18F and PWM problem

    Hi,


    My idea:
    It's a measurement problem - and no real problem.

    It is called "alias frequency" when the sampling rate is less than double of your signal frequency.
    --> read about "sampling...
  17. Replies
    24
    Views
    795

    Closed: Re: RF Detector not detecting cellular phones

    Hi,

    I have to agree with Brian.

    I also find it hard where to begin.
    Like this comment or not: it is no HF design. I can see any design at all.

    A PCB layout is not simply joining some pins...
  18. Replies
    5
    Views
    182

    [SOLVED]Closed: Re: Reed solomon encoder in vhdl

    Hi,

    Makes no sense to me.
    You don't show the tiniest effort of your own. We don't see what you have done so far.
    --> Do a simple internet search on your own. Then draw at least a simple flow...
  19. Replies
    5
    Views
    182

    [SOLVED]Closed: Re: Reed solomon encoder in vhdl

    Hi,

    It seems you misunderstood how a forum works.
    It is not meant that others do your job.

    It is meant that you do your job and if you encounter any problems you will find people here to help...
  20. Closed: Re: Op-amp design to use in 8 bit R-2R ladder DAC

    Hi,


    What about an internet search " R 2R DAC schematic" ?

    Klaus
  21. Replies
    3
    Views
    170

    Closed: Re: Phase shifted pwm using stm32f103

    Hi,


    Now I'm confused.
    This sentence clearly says you want two triangular waveforms...--> I assume this is not possible without additional circuitry

    From the post#1 I thought you want to...
  22. Closed: Re: ESD problem solved by using aluminium covered floor tiles?

    Hi,



    You may see it like this:
    * The person is one electrode of a capacitor.
    * the other electrode is the floor, the walls, any other - even low conductive - material.... with any (low...
  23. Closed: Re: Op-amp design to use in 8 bit R-2R ladder DAC

    Hi,

    A R-2R DAC may be built without Opamp, but it has relatively high ohmic output.
    And relative low ohmic reference input.

    You should be aware, that
    * we don't see the circuit you are...
  24. Closed: Re: Stepper motor doesn't have a brand or model number!

    Hi,


    The torque depends on current.
    No current, low torque, just caused by the magnetic remanence.

    Klaus
  25. [General]Closed: Re: Possibly complex question as I don't yet have a full understanding of these devic

    Hi,

    as already said:

    Klaus
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4