WEEK 1

Week 1 Blog - Drake Csage and Mohammad Ghallab 


1.     What is the class format?
Monday:.                              Wednesday:                       Friday:              
Quiz discussion                         Lab                                            Blog commenting
Lab introduction                                                                           Blog discussion                      
Lab

Quizzes are worth 45% of the grade, Blogs 30%, Midterms 10%, Final Exam 15% of grade


2.     What are the important safety rules?
• Must know where is the fire extinguisher and first aid kits, and remember telephone and emergency numbers.
• Never touch electrical equipment while standing in a metal floor.
• Ask the instructor if you have questions.
•Power off while not working.

3. Does current kill?

Yes when the amperes is between 0.1 and 0.2 it could cause death. Lower amperes will cause some pain and breathing problems with shock.

4. How do you read color codes? Video

https://www.youtube.com/watch?v=9j4gbLbszio 

5. What is the tolerance? 

The tolerance on the 390 Ohm resistor is 5%.  We know this because the final band color is gold. 

6. Prove all of the resistors are in the tolerance range.

Resistors and Tolerance
390 Ohm	390	G
2200 Ohm	2166	G
270 Ohm	267.2	G
1500 Ohm	1470	G
681 Ohm	682	W
180 Ohm	177	G
2020 Ohm	1980	W
150 Ohm	150	G
2720 Ohm	2700	W
301 Ohm	299	W

Some of the white resistors weren't exactly 0% when we measured, but this could be a glitch with how we read the colors.  For instance, red could have been orange, etc.  

7.Difference between measuring voltage and current using a DMM?

When we measured current we had to break the circuit, and when we measured the voltage we did not.  This is because to measure the current we couldn't allow it to reach the resistor or else a voltage would be measured.  Ohms law - V = iR , so current we had to break the circuit.  

8.  How many different voltages can you get from the power supply?

We can get 3 different voltages at one time.  Two of them with supplies and one with the A and B labels that get go from 0 to 25 volts and can be changed with the turn of the button.  

9. Practice circuit results (video) 

Current Video; 

https://www.youtube.com/watch?v=1MKeVwMW590 

Voltage Video: 

https://www.youtube.com/watch?v=aUOOyLXxW5o 

10. How do you experimentally prove Ohms Law?

To experimentally prove Ohms law, we measured the voltage of the DMM with our handheld multimeters, and then we calculated the current that was going through using the handheld multimeter as well.  Then, we found the resistance using Ohms law.  

82 Ohm Resistor

1 Volt	11.07 mA
2 Volt	20.96 mA
3 Volt	34.17 mA
4 Volt	44.9 mA
5 Volt	56.3 mA

46.5 Ohm Resistor

1 Volt	20.5 mA
2 Volt	38.1 mA
3 Volt	57.1 mA
4 Volt	76.7 mA
5 Volt	91.6 mA

11. Rube Goldberg Video

https://www.youtube.com/watch?v=rn_FwWsQdpo 

12. Draw the Circuit 

Rube Goldberg Circuit Drawing

13.  How to Implement into a Rube Goldberg Machine?

by turning on the light that go to the photo sensor which is connecting to a fan, the the fan is turning on an move the small ball until it hits the ground.