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Recent content by hobbyckts

  1. H

    Analog input for microcontroller

    Increase the input signal range to the full range of ADC. May be by using combination of differential & instrumentation amplifier should work for you.
  2. H

    Source of information to Learn hardware board Design

    Yes, there are few videos available in youtube through which we can learn.. If needed kindly let me know will give few references too... - - - Updated - - - Thanks for the info... Seems EDx is fine for learning.. But couldn't get enough details on diverse electronics & hobbyist (circuit...
  3. H

    Source of information to Learn hardware board Design

    Hi, As I know some basics of hardware design. Now I Wanted to learn Hardware Circuit Design in depth. Could you please refer some websites, Pdfs, youtube channels, etc.. to understand in detail & to learn.
  4. H

    Understanding sigma delta ADC

    https://pdfs.semanticscholar.org/efc2/559deb5f3b4b7251182ddb2f087350abb661.pdf
  5. H

    PIC16F877A with GSM SIM900A interfacing problems

    Try using CD4504B. - - - Updated - - - if needed you can try this too... https://synacorp.my/v2/en/pic-development/43-logic-converter-4-channels.html
  6. H

    5v cellphone charger

    Will these work out? https://www.onsemi.com/pub/Collateral/DN06009-D.PDF https://u.dianyuan.com/upload/space/2011/05/31/1306804432-467181.pdf
  7. H

    5v cellphone charger

    As your requirements is in general, even searching in Google will help you out.
  8. H

    PIC16F877A with GSM SIM900A interfacing problems

    The datasheet mentions that module wants TTL levels, not RS232 levels. So you should remove the MAX232 from the circuit and replace it with TTL-CMOS level converters.
  9. H

    [SOLVED] Internal EEPROM memory of PIC18F4550 Microcontroller issue

    Sorry I misunderstood your question and got confused with another post. Could you please try by providing some delay immediately after enabling the interrupts.. Generally, There must me at least 20ms delay between successive usage of routines
  10. H

    [SOLVED] Internal EEPROM memory of PIC18F4550 Microcontroller issue

    Yes, Understood... But not completely.. What is the interface which you used between your EEPROM & PIC? What is the EEPROM which you are using in the design? Share the part number.. If possible post your connection diagram. The problem is not with your English. It is with your explanation. No...
  11. H

    [SOLVED] Internal EEPROM memory of PIC18F4550 Microcontroller issue

    By this statement I have understood that you are switching off your board & not switching on. Kindly explain clearly the methods which you are following for writing the data at the location and also the method you are trying to read back at the same location during power on & Power off
  12. H

    [SOLVED] ADC selection Criteria

    I'm asking this question to prepare a document which could be used as a guidelines before selecting an ADC. That's the reason I want to know that if anything else is missed.
  13. H

    [SOLVED] ADC selection Criteria

    For ADC selections will be following 2 criteria: 1. Primary criteria 2. Secondary criteria Under Primary --> Accuracy/Resolution, Error, Sampling frequency, ADC types, Input signal considerations, environmental considerations, EOL Under Secondary --> Number of channels, Interface, Supply...
  14. H

    Error on Notification

    Hi All, I'm getting a notification and there were no new posts found in the threads which I have subscribed. But still notification is displaying. Attaching the snap shot for your reference. I want to know for which option the notification is showing
  15. H

    Do I need a max232 IC to connect a GPS module with my pc?

    Re: Do i need max232 ic . . ?? Yes, It should because the datasheet of your part says this. "The module supports one full duplex serial channels UART. the serial connections are at 2.85V LVTTL logic levels"

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