Search:

Type: Posts; User: c_mitra

Page 1 of 20 1 2 3 4

Search: Search took 0.03 seconds.

  1. Replies
    4
    Views
    245

    Closed: Re: X-rays on projection CRT

    Sad but true.

    It all depends on many factors. In fact too many.

    X-rays are weakly absorbed by the human body. The part that is not absorbed has no effect.

    Most important mode of absorption...
  2. Closed: Re: Doing electronics on an office carpet (non ESD)

    Carpets look glamorous- but electronics business is glamorous too!

    But carpets are really mess. If a component falls on the carpet, it is gone for ever.

    I would have preferred simple PVC...
  3. Replies
    2
    Views
    112

    Closed: Re: Most efficient method of smoke extraction

    To remove the smoke, you must remove the air which is the vehicle for the smoke. So it makes sense if you can remove it at the source, before it gets mixed with a large volume of air.

    A suction...
  4. Replies
    6
    Views
    214

    Closed: Re: What does 1

    Is TWINT a system variable? Often the system variables are written in ALL CAPS!!

    Take a look at https://www.engineersgarage.com/tutorials/avr-atmega32-twi-registers/

    Perhaps you can understand...
  5. Replies
    6
    Views
    214

    Closed: Re: What does 1

    You are right; it does nothing because the contents are not assigned a location. I think the result will be left into the accumulator and discarded.

    You need an assignment statement: x=1<<2; (or...
  6. Replies
    4
    Views
    245

    Closed: Re: X-rays on projection CRT

    It is a wise warning and better be safe.

    It does produce a small amount of soft x-rays (you can see that the accelerating voltage is around 25kV and the tube is made of thick glass).

    Although...
  7. Replies
    12
    Views
    300

    Closed: Re: question regarding this C operations

    You have added (INCLUDE files) a processor specific header file. Take a look at the inside (do not change anything) and look for a variable TIMER0.

    These system variables are very special: they...
  8. Replies
    25
    Views
    522

    Closed: Re: Will a filter block this waveform?

    Well, let me try to understand the other way: it can be more fun sometimes.

    Your base frequency is 40 MHz; let me assume that this is correct but the waveform is not sinusoidal. Then you will have...
  9. Replies
    25
    Views
    522

    Closed: Re: Will a filter block this waveform?

    This is DC plus 40 MHz; DC will be fully blocked.

    Your filter has a lower cutoff of 100 MHz; it will block 50 MHz about 3 db. 40 MHz little more.

    You decide whether that is acceptable or not....
  10. Replies
    12
    Views
    300

    Closed: Re: question regarding this C operations

    You need to work out in longhand; the time shall be well invested.

    TIMER0 is a register within the processor that has been defined in some header files. The content of this register is described...
  11. Replies
    12
    Views
    300

    Closed: Re: question regarding this C operations

    Yes, it can be confusing.

    Simplify!

    Let a -> b |= c;

    The operator |= is similar to += or -= or *= or /=.

    You can write it in longhand:
  12. Replies
    1
    Views
    391

    Closed: Re: Bash scripting syntax and TCL

    It is not surprising because the frontends are similar for a reason. The backends are very similar because they use the same system calls.

    Scripting languages are simpler to process compared to...
  13. Replies
    16
    Views
    618

    Closed: Re: 100uA analogue meter conversion to 1A?

    Assume that the meter coil is 1360 Ohms. Just use a 620-680 Ohm in series. Now the meter coil is about 2k.

    Now use two 0.1 Ohm resistor in series. They will be 0.2 Ohm - put this 0.2 shunt in...
  14. Closed: Re: Alternative of this Mini DC Submersible Pump

    If you are planning to make only a few of them, then go for the pump based approach. That may be cheaper.

    If you are planning to make thousands of them, then follow the suggestions #9 and add some...
  15. Replies
    16
    Views
    618

    Closed: Re: 100uA analogue meter conversion to 1A?

    Use a DVM- they are cheap, easily available and reasonably accurate. If that is autoranging, you need not worry, otherwise select the 1K (most will say 2K, because 1.999 display) range.

    Still...
  16. Closed: Re: Weller Soldering Iron Tip Problems - not taking solder

    RoHS guidelines recommend /suggest that you avoid toxic components in consumer products; Yes, I know that 60/40 solder has melting point less than 200C (around 180C, I think) and lead free solder is...
  17. Closed: Re: Alternative of this Mini DC Submersible Pump

    I presume the common hand sanitizers contain >50% alcohol- specifically ethyl alcohol. So they will be flammable. But I am not sure whether the vapour can lead to explosion.

    I hope most common...
  18. Closed: Re: Alternative of this Mini DC Submersible Pump

    Diaphragm pumps are robust but peristaltic pumps are more accurate. Both are very simple as far as their operation is concerned.

    Perhaps peristaltic pumps may be more expensive. You need to decide.
  19. Closed: Re: Weller Soldering Iron Tip Problems - not taking solder

    It is relative; the base price in my country is also very similar but with taxes and shipping it becomes close to 18 euro.

    But a copper rod, (about 5gm) with a small iron-nickel disk at the fat...
  20. Closed: Re: Weller Soldering Iron Tip Problems - not taking solder

    These are obviously heavy duty tips and are supposed to get very hot.

    Weller tips are not cheap (they can cost an arm and a leg) but a tip labelled 6 would have been best.

    Iron does get rusted...
  21. Closed: Re: Weller Soldering Iron Tip Problems - not taking solder

    The yellow color is due to oxide of lead; the black form is some lower oxide (lead oxide mixed with lead). The black form does not work with the flux. Once it has turned black, scraping with brass...
  22. Closed: Re: Simple AM modulator for my power oscillator

    Thank You for the enlightenment!
  23. Closed: Re: Frequency Response of LC Filter has a Peak with an Impedance Load

    Quality factor for an oscillator depends on the loading. For all practical purposes, loading should be considered dissipative. For example, R is a dissipative element whereas L and C are not.
    ...
  24. Closed: Re: Microcontrollers and a lot of advice - PIC , AVR, ARM - Software - Books - Boards

    Yes, learning is not difficult. Learning C is going to have long term dividends as you are planning to programming as a career. Good thing is that you can learn it on the job. C can be messy but you...
  25. Closed: Re: Why does .map file have _variable names and not just variable names?

    Variable names that start with an underscore are valid variable names. But user variables do not, by convention, begin with an underscore. Variable names that begin with a single underscore are...
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4