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Recent content by ElectricalEngineering

  1. E

    Solar Power Plant .

    Probably you are willing to create a 20 kW solar panel. For this you need to design a solar array which costs around $40,000. And which will generate around 65 kWH daily. Actual cost and units of generation will vary depending on your location and installation setting.
  2. E

    Voltage divider question

    Arduino UNO can easily handle 20 mA current. Check this single page guide on their website: http://store.arduino.cc/usa/arduino-uno-rev3 As far as I know the internal resistance of Arduino is approximately 10 Mohms, so 0.486 uA current will be flowing in this case. I have not worked with...
  3. E

    Pole numbers of Machine

    I was surfing the impact of pole number on working of the machine (motors and generators). I studied machines for some time and familiar with equation N = 120f/ P. As it says increasing pole number will decrease the speed for same frequency. So is that all or there are some other factors too...
  4. E

    ETAP Help Needed - Urgent

    I uninstalled the Etap back so I'll not be able to accurately answer the problem. But the error indicates base limits. Just increase the base limit to 40%, in case it is 500 roll to 700. I hope it works. elseway i hope someone could better answer it.
  5. E

    Battery protection for over charge and deep discharge

    There are bunch of circuits available in this regard. An example from Engineers garage: **broken link removed**. Don't rely on spoon feeding, 90% chances are you can't find a circuit custom designed for your application. Do search, modify the results for your case. That's simple, fair & square.
  6. E

    What logic gate is this ?

    Andre's solution looks neat. Since it goes with single piece. I'was considering two IC's one having AND and other NOT for NAND A input.
  7. E

    What Is This Symbol? Like two circles overlapping

    In your scenario it is constant current source as Kalus stated. Img: Sometimes it might refer to a transformer (especially in power systems).
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    Bought a 230V@10A Variac for 90USD, was this cheap or expensive?

    The visual look and features assert it's a perfect deal. I encountered similar (sometimes much lower) features for more than $150.
  9. E

    How can I design Automatic Meter Reader using Power line communication modem

    I'll suggest perusing research papers from IEEE & other Electrical journals. I am sharing an automatic meter reading paper from jee. Link: **broken link removed** This might serve a starting point for yous research. The more deep you'll go through research the fast will go acheive it. Get help...
  10. E

    Impedance Matching Transformer

    A simple search of Google and Amazon weights FvM's comments. Looks like you need to assemble the parts on your own. Quotation from bamblog website:
  11. E

    Electronics Presentation Materials

    yeah as I mentioned "Make your own lectures", If you find feasible try every circuit app shared by Catam. One blink in my mind is Hyperphysics. . I hope it wil provide you ultimate resources for Grade 6-9 students, furthermore it'll be easy to start up with. Please check the Electricity and...
  12. E

    Why the door ring can't work?

    I just followed the thread, checked the comments and hope you'll find the solution from betwixt discussions. One piece I would suggest is to assemble the circuit prototype on breadboard (wheneever possible) for avoiding the prospective hassle.
  13. E

    URL for the blog section should be title based

    Url for blog section should be title based Recently I was reading a blog post Dimming lights at: https://www.edaboard.com/blog/2043/ The blog url makes no logic at sight, I checked many blogs and websites using example.com/blog/blog-title as their blog url. For example in present case it should...
  14. E

    Needed matlab code for problem 4.31 (chapter 4) from TS rappaport

    Post the statement of the problem instead of numbering, try to attempt it on your own first, then discuss the problems on Edaboard.
  15. E

    A chart for LED voltages, brightness

    I was searching for an LED sizing chart so as to select proper led sizing. Googling it provided an LED calculator from kitronik and a chart from oksolar. The calculator is amazing since it provides all details on 5mm, 3mm led. Quite good, but I am looking for some brief chart which mentions all...

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