Friday, January 13, 2017


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                      

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 

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
2200 Ohm
270 Ohm
1500 Ohm
681 Ohm
180 Ohm
2020 Ohm
150 Ohm
2720 Ohm
301 Ohm

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; 

Voltage Video: 

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 

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.  


  1. Good summary of how current kills. I feel that it is also necessary to discuss when current is over .2 amps it will not kill you immediately. This is actually because the heart goes into a state of contraction and doesn't bash into surrounding wall.

    What is your opinion on the classes format? Would you change anything if he proposed different ideas?

    -Group 10

  2. This is a good start! Can't wait to see your data and videos.

  3. Nice blog. Your color scheme is refreshing. some of your links aren't clickable, I'm not sure if you knew but it isn't a problem really since you can just copy and paste. good pictures as well.

  4. Loved your RG circuit drawing. Good job.
    - Captions missing.
    - Have your videos embed into the blog (no point deductions).

  5. Also, 0% tolerance does not exist. They mean there is not tolerance specified. It could be good or bad.

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