1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Solving two circuits

  1. Dec 13, 2014 #1
    hi
    i need help to solve these two circuit as my professor said in university.
    i must find the value of each part to make these two circuits in pspice and in breadboard.

    i need the values and KVL and KCL.
    the first photo is PPG and voltage for each v must be 9 volt and output must be LED.
    the second one is 2 channels amplifire for mp3.

    http://www.myup.ir/images/74176609090443184933.png [Broken]
    http://www.myup.ir/images/78167216323705616172.png [Broken]

    more information about first one :

    The photoplethysmograph (PPG) is a device with which one may monitor an individual’s pulse by measuring the light transmittance through a finger, earlobe or toe for example. The word plethysmograph comes from the Greek plethysmos,meaning enlargement, which in this case refers to the slight enlargement of the arteries with surges in blood flow as the heart pumps. A typical PPG circuit consists of a light-emitting diode (LED), a phototransistor (PT) or photodiode that responds to received light by generating a photocurrent, and amplification circuitry to bring the signal to a more manageable level


    thanks
     
    Last edited by a moderator: May 7, 2017
  2. jcsd
  3. Dec 13, 2014 #2

    CWatters

    User Avatar
    Science Advisor
    Homework Helper

    Forum rules require you to have a go first. Show us your attempt and tell us where you have got stuck. That way we don't waste time explaining things you already know. There is also a homework template to use.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Solving two circuits
  1. Circuit Solving (Replies: 14)

  2. Two circuits (Replies: 1)

  3. Help solving Circuit (Replies: 4)

Loading...