Today we watched some more You tube videos about resistors and learned how to calculate the amount of resistance a resistor has by looking at the bands on the resistor. We learned the difference between 5 band and 3 band resistance by doing the exercises in the textbooks.
A resistor is a two-terminalelectronic component which implements electrical resistance as a circuit element. When a voltage V is applied across the terminals of a resistor, a current I will flow through the resistor in direct proportion to that voltage. The reciprocal of the constant of proportionality is known as the resistance R, since, with a given voltage V, a larger value of R further "resists" the flow of current I as given by Ohm's law:
Left to right: Pile of different resistors, Two circuit diagrams both diagrams are in series.
This is a chart that lists what each different colored band on a resistor means in terms of the amount of resistance.
To calculate the total resistance of a circuit when the resistors are in series all you have to do is add the resistance of each resistor together. Ex Rt = R1 + R2... etc
To calculate the total resistance of a circuit when the resistors are in parallel the equation becomes Rt = 1/R1 + 1/R2 ... etc
If you have some resistors in series and in parallel the equation becomes Rt = 1/R1 + R3 + 1/R2 + R4.
Preceding these exercises I then spent the rest of class having a coffee break and trying to log in to this stupid wiki site which insisted that all my emails did not exist....
But always remember.....
February15th,
Today we watched a You Tube video where a 12 year old made the entire class look dumb because he knew more about capacitors and electronics than anyone in the class. After this video we watched a video where a 95 year old man tried to explain capacitors but instead continued to fall asleep during the video (which they edited out).
A capacitor can convert AC power into DC by storing a charge and then releasing it in a constant rate or burst. The capacitor does this by storing energy on the positive side and then discharging this gathered energy out the negative side. The positive and negative sides are separated by a thin layer plastic.
And on a less serious note... This is what happens when I face roll a keyboard....... < xcftr78xcr > TADA!!!!!!!!! >=D
February16,
Today we watched a video about transistors and how they work. In this video we learned about the three layers of transistors. The Emittor, the Base, and the Collector. We also got a first look at breadboards and Mr. Brooks went over how they are used.
On the right A transistor is a semiconductordevice used to amplify and switch electronic signals. It is made of a solid piece of semiconductor material, with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals changes the current flowing through another pair of terminals. Because the controlled (output) power can be much more than the controlling (input) power, the transistor provides amplification of a signal. Today, some transistors are packaged individually, but many more are found embedded in integrated circuits.
On the left is a breadboard, usually the power and ground are on opposite sides of the board but in this diagram you can see in the bottom left corner of the picture. That they are on alternate rows. Bread boards are used to design a circuit and make sure that everything is functional and wont just burn itself out when actually created on a circuit board. On the right we have a transistor the transistor is used widely in logic gates and processors because of its 3 different connectors.
This is an example of a flasher circuit. I uses 3 555 timers to have multiple LED flash at specific intervals.
February 17,
Today we watched You Tube.... again...... This time we watched a video on how transistors can be used as a switch. Also we watched a video on the process Intel performs to create their processors. After this video we watched a video on how AMD creates their processors. The AMD video was much more epic and brought a tear to my eye.
The process of creating a processor takes months of precision work. Because if the wafer fails then there is no way to correct any of the mistakes in it. The main components in a processor are made out of basically pure silicon which has been processed and refined. Each wafer that is created yields several working processors.
and here is some doping lines =)
This is what happens when I charge Malaysia!!!!
February 18,
Today I worked with Simon on his computer tear down flash project, and also gave him a look at what we do in grade 12 computer science by showing him a Java assignment I am working on. I also cleaned up some of the previous posts in this weeks journal entry.
Material Covered [Rubric] Mr-Brooks Eprocedure for a desktop computer tear down E resistors and color codes Eparallel circuits and series circuits [Formulas] ECapacitors E Flasher Circuits ETransistors EBreadboards E Integrated Circuits: Sand to ICs
February14th,
===================================3 C===========================================================================================
Today we watched some more You tube videos about resistors and learned how to calculate the amount of resistance a resistor has by looking at the bands on the resistor. We learned the difference between 5 band and 3 band resistance by doing the exercises in the textbooks.A resistor is a two-terminal electronic component which implements electrical resistance as a circuit element. When a voltage V is applied across the terminals of a resistor, a current I will flow through the resistor in direct proportion to that voltage. The reciprocal of the constant of proportionality is known as the resistance R, since, with a given voltage V, a larger value of R further "resists" the flow of current I as given by Ohm's law:
Left to right: Pile of different resistors, Two circuit diagrams both diagrams are in series.
This is a chart that lists what each different colored band on a resistor means in terms of the amount of resistance.
To calculate the total resistance of a circuit when the resistors are in series all you have to do is add the resistance of each resistor together. Ex Rt = R1 + R2... etc
To calculate the total resistance of a circuit when the resistors are in parallel the equation becomes Rt = 1/R1 + 1/R2 ... etc
If you have some resistors in series and in parallel the equation becomes Rt = 1/R1 + R3 + 1/R2 + R4.
Preceding these exercises I then spent the rest of class having a coffee break and trying to log in to this stupid wiki site which insisted that all my emails did not exist....
But always remember.....
February15th,
Today we watched a You Tube video where a 12 year old made the entire class look dumb because he knew more about capacitors and electronics than anyone in the class. After this video we watched a video where a 95 year old man tried to explain capacitors but instead continued to fall asleep during the video (which they edited out).
A capacitor can convert AC power into DC by storing a charge and then releasing it in a constant rate or burst. The capacitor does this by storing energy on the positive side and then discharging this gathered energy out the negative side. The positive and negative sides are separated by a thin layer plastic.
And on a less serious note... This is what happens when I face roll a keyboard....... < xcftr78xcr > TADA!!!!!!!!! >=D
February16,
Today we watched a video about transistors and how they work. In this video we learned about the three layers of transistors. The Emittor, the Base, and the Collector. We also got a first look at breadboards and Mr. Brooks went over how they are used.
On the right A transistor is a semiconductor device used to amplify and switch electronic signals. It is made of a solid piece of semiconductor material, with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals changes the current flowing through another pair of terminals. Because the controlled (output) power can be much more than the controlling (input) power, the transistor provides amplification of a signal. Today, some transistors are packaged individually, but many more are found embedded in integrated circuits.
On the left is a breadboard, usually the power and ground are on opposite sides of the board but in this diagram you can see in the bottom left corner of the picture. That they are on alternate rows. Bread boards are used to design a circuit and make sure that everything is functional and wont just burn itself out when actually created on a circuit board. On the right we have a transistor the transistor is used widely in logic gates and processors because of its 3 different connectors.
This is an example of a flasher circuit. I uses 3 555 timers to have multiple LED flash at specific intervals.
February 17,
Today we watched You Tube.... again...... This time we watched a video on how transistors can be used as a switch. Also we watched a video on the process Intel performs to create their processors. After this video we watched a video on how AMD creates their processors. The AMD video was much more epic and brought a tear to my eye.
The process of creating a processor takes months of precision work. Because if the wafer fails then there is no way to correct any of the mistakes in it. The main components in a processor are made out of basically pure silicon which has been processed and refined. Each wafer that is created yields several working processors.
and here is some doping lines =)
This is what happens when I charge Malaysia!!!!
February 18,
Today I worked with Simon on his computer tear down flash project, and also gave him a look at what we do in grade 12 computer science by showing him a Java assignment I am working on. I also cleaned up some of the previous posts in this weeks journal entry.
Material Covered [Rubric] Mr-Brooks
E procedure for a desktop computer tear down
E resistors and color codes
E parallel circuits and series circuits [Formulas]
E Capacitors
E Flasher Circuits
E Transistors
E Breadboards
E Integrated Circuits: Sand to ICs
Communication Level 4+