Resistor Color Code
This unit was one of the hardest, yet easiest unit ever. Well, it would have been if you have taken this course last year. We learnt how to read resistors by the color code. The color code picture is on the left. From what I have learnt this year, you would just memorize the numbers and the colors, but last year, I learnt the color code with this acronym:
Better
Be
Right
Or
Your
Great
Big
Venture
Goes
Wrong
(But green comes before grey)
For the gold and silver, I think the most expensive is the cheapest number. So gold would usually have the highest value, but in the color code, gold would be ±5%
and silver would be ±10% and no band is ±20%.
Better
Be
Right
Or
Your
Great
Big
Venture
Goes
Wrong
(But green comes before grey)
For the gold and silver, I think the most expensive is the cheapest number. So gold would usually have the highest value, but in the color code, gold would be ±5%
and silver would be ±10% and no band is ±20%.
Ohm's Law
I think this is the lesson that makes you sound smart. There was WAY too much math and science with Ohm’s Law. The picture on the right shows the triangle that helps with the calculations. Here are what the letters mean:
E – Voltage. Can be represented as V, volts, electrical pressure, electromotive force (emf), potential
I – Current. Can be represented as A, amperes, amps, electron flow
R – Resistance. Can be represented as ohms and Ω
To find the calculations, this is what you have to do:
E=I x R
I = E / R
R = E / I
E – Voltage. Can be represented as V, volts, electrical pressure, electromotive force (emf), potential
I – Current. Can be represented as A, amperes, amps, electron flow
R – Resistance. Can be represented as ohms and Ω
To find the calculations, this is what you have to do:
E=I x R
I = E / R
R = E / I
Electrical Prefexes
This was really hard, unless you have really good memory. The chart shown on the left is what you have we use to calculate the electrical
prefixes. These are just short forms of large numbers. So first we would have to calculate the number then use Ohm’s Law to find the missing value.
prefixes. These are just short forms of large numbers. So first we would have to calculate the number then use Ohm’s Law to find the missing value.
Breadboards
That was not the only thing we did in that unit. We had to read schematics of breadboards and apply them. We had to do labs 1-11 as our assignments and labs 13 and 16 for our summative. Here are some pictures of our labs:
Summative
Here are the two summatives we had to work on, with the schematics.