3.1.1 Outputs and Inputs

• A while ago we did Activity 3.1.1 which went over outputs, inputs, digital and analog switches.

Some of the main questions from the packet include:

• potentiometer ranges from 43-5000
• you are able to change to direction/speed of motors by right clicking on them. OR you can change the direction by switching the wiring.
• Reed switches are used to detect magnetic fields, like the field emitted by the electromagnet.
• the reed switch behaves normally open.
• Photoresistors' inputs become lower the closer they get to the lamp.
• Phototransistors' inputs become higher as they get closer to the lamp.
• The phototransistor's function can be switched by just changing the program.

Questions:

1. Describe how mini switch diagram relates to concept of normally open or closed??

----The miniswitch's wiring diagram is simple, line with a circle indicates it moves, and lines indicate lines of power. Thus it is noramlly closed where the line makes a complete circuit, and it is normally open when there is a break in the line.

2.How is computer able to interpret the analog signals from interface??

--- A computer can interpret analog signals because it converts them to digital and then using its intelligence can convert back to analog.

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

---The resistance decreases as the resistor gets warmer because the higher the temp, the easier it is for current to flow.