Activity 3.1.1 Inputs and Outputs

1. Examine the wire diagram on the mini switch and describe how the diagram relates to the concepts of normally open and normally closed.

2. If computers only understand digital signals, then how is a computer able to interpret the analog signals coming from the interface?

3. Why does resistance decrease as the NTC Resistor becomes warmer?

Mini Switch:

-when plugged into 1 and 3 and not pressing button:

unchecked

at zero

not present

-when in 1 and 3 and pressed

checked

at one

present

-when plugged into 1 and 2 everything is flip-flopped

Potentiometer:

-range: 38-4945

NTC Resistor:

-1668

-while warm was at 1318

Motor:

-one way to change the direction of spin is by switching the wire ports

Electromagnet:

When reed switch is touched the box becomes checked

Photo transistor:

-closer light gets the number goes down

--This information is Jackson's--

I was sitting next to Jackson and observed what he was doing, but I did not participate.