Engineering 44gurias

For this lab we had to connect a resistor parallel to an inductor and calculate the current and time constant of the inductor. Our R1 value was 100 ohms, our R2 was 47 ohms. Our inductor had a value of 1uH. We calculated that the inductor had a current of 0.05 amps at time zero, and 0 amps at time infinity. Our time constant was 0.031 us Leading to the equation       i(0)=0.05e^-t/(.031us) Here's a picture of the calculations  and circuit diagram                                                                                             Here are pictures of the oscilloscope this is a graph of the voltage through the resistors This is the graph for the current that we created using the values obtained from the r...

For this lab we had to estimate the initial capacitor voltage and the time constant . Here's the circuit diagram Here's a picture of the circuit    Our resistors were R1=.926K ~=1k R2=2.16~=2.2k Our capacitor =22 uF We calculated that our voltage  across the capacitor would be  3.44 V. Our actual voltage across the capacitor was 3.456 V. Our calculated time constant was 283 ms. Our actual value was 283. Here are pictures of the oscilloscope We were surprised at how close our values were. We assume the reason they weren't exact was due to the resistors, we were supposed to have exactly 2.2k and 1k but we had 2.16k and .926k. However besides this I think our values are pretty accurate. 

For this lab we had to create a difference amplifier, and find the relationship between vin and vout. From our calculations we found that if both the Rin resistors are the same values. The relationship between Vin and Vout is                                                   Vb-Va=Vout Where Vb and Va are our input voltages.  It's called a difference amplifier because it outputs the difference of the input voltages. Here's the circuit diagram Here's our circuit Here's our graphs This is for Vb=1 Our theoretical values didn't exactly match our experimental values. For example when Vb=1 and Va=-4 our Vout should've been 5, but we got 4.30. My reasoning for this, is because the resistors we used weren't exactly equal, so I'm assuming this created the difference between theory and experimen...

The relationship for the non-inverting voltage amplifier was Vout=Vin*(  (R2/R1)+1) Our resistors values were 20k Ohms for the second resistor, but an actual resistance of 21.2k Ohm. For the first resistor the value is 10k Ohm, and the actual value is 9.95k Ohm. For the procedure, we increased the Vin voltage and wrote down the Vout voltage and created a graph. Here's the circuit diagram Here is our circuit Here are our values   We noticed that we reached saturation at -3.51 and 4.28 for the Vout. From our calculation we were supposed to have a gain of around 3. We only achieved this when our Vin went from -1.5 to 1.0 V. After that our values began to not match our theoretical gain. So from this we can deduce to achieve peak gain we need to stay between -1.5 and 1.0 volts.

For this lab we had to design an inverting summing circuit. Our two input resistors, R1 and R2 had resistances of 21.2 Kohm and 21.6 Kohm respectively. Theoretically they should R1=22k and R2=22k. Our output resistor had an theoretical resistance of 10k and an actual resistance of 9.7 k. For this lab we had to keep V1 at 1 V, change the Vb voltage and then measure the output voltage. For the second trial, we had to keep V2 at 1 v, change Va and measure the output voltage again. For our prelab, we calculated that our out resistor voltage should be Vo=-(Va+Vb)(R3/R1) Here's the circuit diagram Heres a picture of our circuit Here's our values for constant Va at 1 V Va=1 vb vo -4 1.38 -2 0.46 -1 0 0 -0.42 1 -0.88 2 -1.35 3 -1.81 5 -2.73  Here's our graph We noticed that the op-amp reached saturation at 1.38V and -2.73 V Here...

In this lab we had to use an op-amp and resistors to create a gain of 2 Here's our circuit We used a 20k resistor as our Rin, and 10k for our Rout.The actual values for both resistors are 19.91k Ohm and 9.94k Ohm, respectively. We used an analog discovery to produce +5 and -5 volts to the opamp, and then provided the varied Vin voltage also using the analog discovery. As we changed the Vin voltage we noticed that -3V to -2.0 V was the voltage necessary to obtain a Vout saturation of 4.29. When we  changed our Vin to -1.5 V we noticed that our Vout stopped being saturated. We then began to increase the Vin until we reached a negetive saturation at 2.0 V. Once we had a Vin of 2.0 V our Vout was saturated at -3.5 V. Looking at our values we noticed that we obtained a gain of 2 when our Vin ranged from -1.5 to 1.5. So basically I noticed that we obtain the gain we want in the linear part of our graph Here's the data I plotted