WEEK 5

We are going to explore electricity and electronics.

GOALS:

       Review the use of logic gates.

       Add switches and LED's to our circuit.

 

The logic gate circuits that we built last week can be improved. The state of the inputs and outputs can be used to light LED's. When we see that an LED is on we then know that the associated input or output is true. When we that the LED is off then we know that the state is false. Also we can add switches to facilitate the changing of the input conditions.

 

Switches

The simplest switch simple "makes" or "breaks" a connection. Light switches normally have two positions, on and off.

Here is how a simple switch would be put into an electronics diagram.


In the above circuit the switch is off.

 

Our switch will be more complicated it will allow us to switch between 5V and 0V.

 

LED

We looked at LED's in a previous lab. Remember that LED's need to be used in combination with a resistor. The resistor limits the current so that the LED doesn't burn up.

 

QUIZ *******

 

QUIZ *******

In order to receive a grade of A you must successfully complete the lab portion of the course, read prelab material, and pass the lab quiz. In order to pass you must get 75% of the questions correct.

In order to receive a grade of B you must successfully complete the lab portion of the course. The quiz is optional. For fun feel free to try the quiz.

You are not allowed to consult with other students while taking the quiz. You will be given a limited time period to complete the quiz. You may refer to any written material.

You may take the quiz at any time during the week but only once.

The quiz will be available starting on the day you cover the material and ending one week later.

 If you have troubles please discuss the difficulties with DRG.

You are not allowed to consult with other students while taking the quiz. The quiz will be available at least from lab until following lab. You will be given 30 minutes to complete the quiz and you may refer to any written material.

USE LON CAPA