the tired week of project

  In this week, our group begin to try another circuit. However, our teammate Abanoub Milad has not joined in this week's experience. This is the second time that he absented the experience. in this case, this week, our group has only two people to build the circuit.the figure 1 is our finally circuit what we build this week.

figure 1

when we connect the energy source and oscilloscope. when I skim over the RE200B. Oscilloscope's output only have a line. they did not have some change. Then I touch the RE200B, it can change a little, but it did not meet requirement. in this case, we began to test the amplifying circuit. we connect the oscilloscope in the first LM324. However, it output like the finally output. we must check the circuit again. In Multisim software, I build the circuit to simulate. The circuit is figure 2.

figure 2

In the end, we get the simulate result like figure 3.

figure 3

The output is like our output in experience. in this case, we must check the circuit again. the time is not more. our group must check quickly and get the correct answer.