+ Post New Thread
Results 1 to 5 of 5
  1. #1
    Newbie level 6
    Points: 1,059, Level: 7

    Join Date
    Jul 2007
    Posts
    12
    Helped
    0 / 0
    Points
    1,059
    Level
    7

    optical heart-rate sensor

    help needed , i'm a beginner in designing the schematics. can someone look at the circuit , and help me.

    this is the design.


    this is the schematic i made T_T




    is my design correct? when i stimulate , it says something about Pin VEE not modelled for U2. what does it means ? help anybody... sorry if it is a stupid questions. thanks.

    Added after 4 hours 25 minutes:

    anyone have tried doing this project before this ?

    •   Alt24th July 2007, 17:09

      advertising

        
       

  2. #2
    Newbie level 6
    Points: 1,059, Level: 7

    Join Date
    Jul 2007
    Posts
    12
    Helped
    0 / 0
    Points
    1,059
    Level
    7

    Re: optical heart-rate sensor

    is this a wrong place to post this topic?



    •   Alt25th July 2007, 13:04

      advertising

        
       

  3. #3
    Advanced Member level 4
    Points: 12,348, Level: 26
    artem's Avatar
    Join Date
    May 2003
    Location
    Turkey
    Posts
    1,350
    Helped
    127 / 127
    Points
    12,348
    Level
    26

    optical heart-rate sensor

    That question mainly relates to simulation tool (guess proteus) . Next guess is that you did not specify connection of U2 power pin to power rails in your program.
    Sorry i dont use Proteus .

    BTW , you miss Q1 emitter connection to opamp output



    •   Alt25th July 2007, 13:37

      advertising

        
       

  4. #4
    Full Member level 1
    Points: 2,645, Level: 11

    Join Date
    Aug 2006
    Location
    india
    Posts
    106
    Helped
    8 / 8
    Points
    2,645
    Level
    11

    Re: optical heart-rate sensor

    In a simulator for each component there requires a model file. In your simulation there is no model file available for the VEE. You have to add that modle file and verify it.



  5. #5
    Advanced Member level 4
    Points: 12,753, Level: 27
    Fragrance's Avatar
    Join Date
    Jul 2002
    Location
    East Of Earth
    Posts
    1,187
    Helped
    243 / 243
    Points
    12,753
    Level
    27

    Re: optical heart-rate sensor

    Quote Originally Posted by p0nta
    help needed , i'm a beginner in designing the schematics. can someone look at the circuit , and help me.

    is my design correct? when i stimulate , it says something about Pin VEE not modelled for U2. what does it means ? help anybody... sorry if it is a stupid questions. thanks.

    Added after 4 hours 25 minutes:

    anyone have tried doing this project before this ?

    just check this post you will find every thing here also send me your dsn file via pm to solve vee problem

    http://www.edaboard.com/ftopic57616.html

    regards
    Fragrance



--[[ ]]--