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Recent content by mvs sarma

  1. M

    SA602 colpitts oscillator help needed

    I find may designs using externally fed by discrete oscillators. Mostly, they are not depending on internal transistor for LO. Perhaps it helps resolve this issue and also internal interference due to oscillation . sarma vu3zmv
  2. M

    2 layer stack up with 100 ohm and 50 ohm impedance

    https://www.google.co.in/search?q=STRIPLINE+MATCHING+100+OHM+TO+50+OHM&client=firefox-b&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwiZ3OGa0tfQAhVKPo8KHapBD3IQsAQILQ&biw=1320&bih=703&dpr=1.09 Appears your concept of thick to thin could work see example images
  3. M

    [PIC] Book for Programming c language with PIC microcontroller

    at microchip site s dowload this user guide andf it shoul;d support you, i suppose...
  4. M

    No output from Pulse Tranformer

    if you have multiple secondaries that are interconnected, then, phasing could be the reason. sarma vu3zmv
  5. M

    Cadsoft Eagle limitations

    while we make the board, we can call for needed packages and change the internal pads therein, by using drill and diameter . save and come out on the board layout we can call library and "save all" it would bring the changes on to your component modified. there are no errors after pressing...
  6. M

    [PIC] PIC18F4550 PORTB.B7 always returns 1

    as per datasheet following programming of B port helps CLRF PORTB ; Initialize PORTB by ; clearing output ; data latches CLRF LATB ; Alternate method ; to clear output ; data latches MOVLW 0Eh ; Set RB<4:0> as MOVWF ADCON1 ; digital I/O pins ; (required if config bit ; PBADEN is set) MOVLW 0CFh...
  7. M

    Purchasing IC's and various components from EBay.

    i have been buying on ebay for last 4 years. Yes, I had some failures. But major things are ok. however there are many versions of LM386 with gain variations, I suppose.. please see the datasheet. After all ebay is a consortium of sellers. Only issue i had with ebay or any other on line...
  8. M

    SMD MOSFET marking code GM

    MF ZVN3310F Zet M SOT23 n-ch mosfet 100V 100mA the letter f may not be in capitals. this is one possibility
  9. M

    Blue HD44780 16x2 LCD with 3.3V ?

    Please see the link Perhaps this specific display could work with 3V3. https://www.sparkfun.com/products/9053
  10. M

    requestfor a datasheet f SGM2175 Ver1.0

    Brian, I fear the film is polarisor and not just dust prevention foil.
  11. M

    requestfor a datasheet f SGM2175 Ver1.0

    Thanks for fast reply Brian, I am attaching photos of the device for ease of identification. https://obrazki.elektroda.pl/5814778500_1455626317.jpg https://obrazki.elektroda.pl/3938905400_1455626318.jpg - - - Updated - - - entire device measures 1" *2.25" approx
  12. M

    requestfor a datasheet f SGM2175 Ver1.0

    I have a chance to get few LCD glass displays branded SGM2175 Ver1.0 i failed to get any data on this device it has 22(11+11) pin lcd glass with edge pins soldered to board the board has 9 pin connector facility it has One CoB behind. and back lit for lcd i could assume two pins for...
  13. M

    Rogers RT/Duroid in USA for Antenna fabrication

    If the demand is not urgent, ebay has it see here **broken link removed** Sorry , it appears a closed sale. it shows available and later as "ended"
  14. M

    [PIC] microcontroller copy

    Re: [Moved]Programmed microcontrollers most of proprietary chips would be code locked. I dont expect that you could copy and reprogram. P{erhaps the only way is to correspond to company who supplied the equipment, pay and get a pre programmed chip claiming serial # of faULTY EQUIPMENTWITH...
  15. M

    Arduino Sketch Software to load code to a non Arduino board

    i get your point. once crystal used in either case is of same frequency, i suppose Yes
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