Day 17 Lab 04/30/14

Electronics:

In this lab experiment we learned the use of oscilloscopes in both the AC and DC scope to read the values of what is being measured. By using a device like a function generator, we were able to introduce frequency into the scope and see the wave on the machine to determine the period and amplitude of the wave. We see that changing the shape of the wave can result in the square waves, triangle waves ,and sine waves in which all can be measured. Now with the knowledge of the usage of the oscilloscope with a mystery box and find the combination to determine the real value of the mystery box. This can be placed in circuit in AC mode to see the current and the voltage of the circuit by being able to read the scope. Lastly we learned how the oscilloscopes work on the inside because it is like a flashlight in which a lot of free electrons are shot causing the green light on the screen so it can be read when used.

This is the introduction where we saw how an oscilloscope works on the inside by showing the green light at the end of the screen. The green light at the end of the long rod are free flowing electrons that shoot into the screen causing the light. This set the understanding of the experiments that proceed in order to understand what the screen of the scope says. 

Function generator produce frequencies causing the pitches to come out when the generator is connected to a speaker. By adjusting the frequency can be made to different pitches that can be heard or not and using the oscilloscope can see the actual waves being produced by the generator. 

The image of a sine wave created by putting the function generator in the scope and using the number of squares being occupied a person can get the amplitude and period of the wave. By adjusting the knobs of the scope we were able to make a wave that can be easy to read.

The increase of the frequency on the function generator changes the size of the wave on the scope and change most of the variables. Just like the image prior shows the wave but in order to make a clear readable wave you have to move knobs like position to make it easier to read.

The waves can be change into square waves and still can be read to find certain values of using the scope. But when using the square waves on the scope, the duty percentage has to be found because that is the time that is the space between each wave and include that in the calculations. The waves can be changed into the sine waves and triangle waves.

When placed in a circuit with a resistor and capacitor the image came out in the DC channel and shows a different reading other than waves discussed prior of the images before.

This came out with a wave but its shape is shaky not a smooth curve like the ones produced from the function generator. The scope reading shows the image of the crooked wave but is still made good enough to read to find the values like amplitude and the period.



The scope on the xy function when placed with two function generator showing the dimension of the waves that can be seen in the spherical image The change in the voltage dials changes the shape and movement of the image on the scope in which is one thing more that the oscilloscope can do when placed with  function generator.   

These are the results to the mystery box that was given to us by using the oscilloscope to determine the combinations of each of the colors. By noticing the shapes of the scope we see the relationships and how each one of the images is different and can tell the different combinations of the colors. As in the image we can see the result the yellow button has no charge causing any combo with the yellow causes no change in the oscilloscope.

The image of the mystery box with the different knobs of color combinations in which we used the different channels of the oscilloscope settings and find which of the bottoms contain certain voltages using the scope reading and using the knobs to find the values that are needed to come to a conclusion like the board with the table in the image above