optical heart-rate sensor

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p0nta

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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 ?
 

is this a wrong place to post this topic?
 

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
 

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.
 



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



regards
Fragrance
 

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