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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.
90_1185276732.gif


this is the schematic i made T_T

74_1185276933.gif

53_1185276995.gif


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.
 

p0nta said:
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 ?
Click to expand...


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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