Electronics education

Discussion in 'The Projects Forum' started by gygy, Feb 3, 2014.

  1. gygy

    Thread Starter New Member

    Feb 3, 2014
    9
    0
    I find many electronics tutorial in Internet, but never find what I am looking for. For example if I want to lear how to make circuit with microcontroller. In tutorials alays power supply is directly connected to the power source. In Arduino board it is not.
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    What do you know about μC
     
  3. gygy

    Thread Starter New Member

    Feb 3, 2014
    9
    0
    Difficult to explain. For example I read part of ATmega8 datasheet - more specially the part about boot loader. Seems well written and possible (for me) to programming it.
    Main problem for me are circuits - using passive elements.
     
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    Draw up something and show us so we can correct ur mistakes
     
  5. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    Perhaps you could reword that... The schematics using a bare microcontroller will tell you to connect the power pins to your power supply. The Arduino board is already laid out to connect those pins whenever power is applied to the board.

    The Arduino website is pretty helpful to get the basics down...
     
  6. gygy

    Thread Starter New Member

    Feb 3, 2014
    9
    0
    OK.
    Want to use CPLD: Atmel ATF2500C. On page 4 of datasheet it is written:
    [​IMG][​IMG]
    So, how to keep requirement 1 - what circuit? What is "signals from which clock terms are derived"? What is t_w? How to make delay t_PR delay.
     
  7. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    attachment does not work

    Thought I told you to draw the diagram.

    If you don't understand the diagram how can we help u.
     
  8. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    Laying out a board for and using a CPLD is not a task for beginners. You should probably start with a more basic task and work your way up.

    This will be defined in the timings section. Since your image is fuzzy, we do not know the context.
     
  9. LvW

    Active Member

    Jun 13, 2013
    674
    100
    Gygy, is it your intention to rely on internet information only?
     
  10. gygy

    Thread Starter New Member

    Feb 3, 2014
    9
    0
    I am sorry, that can not attach images here. Image URL is:
    http://s1.postimg.org/udaljrdlb/power_atmel_ATF2500_C_20_PU.png

    I am agree. That is why I ask very basic questions.

    What other sources to use, especially about ATF2500C?
     
    Last edited: Feb 3, 2014
  11. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,771
    971
    Its like trying to learn to read and starting with War and Peace.
    What happened to One Fish, Two Fish, Red Fish, Blue Fish?

    If you want to learn micros you DON'T start with a VHDL/CPLD.

    Typically "learning" involves starting with something simple and working your way up to more difficult tasks..

    Seems like you need to "learn to learn" first.
     
    gygy and tshuck like this.
  12. gygy

    Thread Starter New Member

    Feb 3, 2014
    9
    0
    I understand, but do not want to write completely wrong diagram.
     
  13. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    I have never used that uC.

    you have to wait till someone who does to reply
     
  14. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    I will be frank with you. The sheer amount of explaining that it would require to make you ready to use a CPLD from little knowledge is too much to ask of a forum for free. We volunteer our time to help people, but there is only so much each of us has. That is not to discourage you from asking questions, but to, instead, encourage you to do your own research and ask specific questions regarding your endeavors.

    That said, you may find the following useful:
    FPGAs4fun
    Atmel's Getting Started with SPLDs and CPLDs
    Rolfe's Guide

    You also may want to get a development kit(PDF) to start with
     
    Last edited: Feb 4, 2014
  15. gygy

    Thread Starter New Member

    Feb 3, 2014
    9
    0
    Thank you tshuck, but up to now I ask 3 questions, and get exactly 0 answers. So, what time you lost? At least to give some acceptable links, BUT...

    You recomend me something, which I not need. I know, or I can learn very easy (without help) how to controls FPGA chip, but my problen is external part of circuit.

    FPGAs4fun:
    I read inside "...using an FPGA board". So there is not explained how this FPGA board is created.

    Atmel's Getting Started with SPLDs and CPLDs:
    What I can find more, than datasheet? I have troubles with it.

    Rolfe's Guide:
    The same as first: Not make any hardware! I'd also recommend a dev board with at least switches and LED's on to get you started. I didn't bother because I had a "Gertboard" for my Raspberry Pi which I could use to provide these facilities.
     
  16. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    ...then, perhaps, you should ask a clear, concise question that does not require hours of typing to answer.

    You started by talking about a power supply in an Arduino and now are on to CPLDs - can you blame anyone for not being sure what it is you want?
     
    Last edited: Feb 4, 2014
  17. JoeJester

    AAC Fanatic!

    Apr 26, 2005
    3,373
    1,162
    Question 1 requires you to know the definition on monotonic and how it applies to Vcc.
     
  18. gygy

    Thread Starter New Member

    Feb 3, 2014
    9
    0
    It is obvious, that without know this my question is meaningless. I know this, but have no idea how this can be garanted by circuit. What circuit? It just mean, that can not use mechanical key to turn on power???
     
    Last edited: Feb 4, 2014
  19. TANDBERGEREN

    Member

    Jan 20, 2014
    74
    4

    What Ardunioboard are You reffering to?

    Look at theese: http://arduino.cc/en/Main/ArduinoBoardUno

    The black little thing in the lower left corner of theese boards are all powerconnector. 5V powersupply is to be connected there.

    You should also study theese pages: http://arduino.cc/en/Guide/HomePage

    Or if You preffer the whole story: http://arduino.cc/
     
Loading...