course	mod	topic	first name	date completed
cit-115	wk. 1	system diagramming

Modern computers contain two types of "memory": fast, short-term memory known as RAM (Random Access Memory) used to store data during logic computations, and long-term storage such as a hard drive. This is a photo of RAM.

cit-115 master sequence > system diagramming

Computers are systems! (So what's a system?)

Learning objectives

TR.115.IT.1: Classify devices into the categories of: electrical, electronic, computer, robot and defend the classifications using the definition of each category
TR.115.IT.2: Label a system diagram's core components and identify deficiencies in a given system diagram
TR.115.IT.3: Design a system diagram for a non-computer system which includes labeled flows between labeled components


key points	Electricity powers both "normal" electrical devices, such as ceiling fan or light bulb. Most household uses of electricty use a type called Alternating Current (AC) at 110V, which is dangerous to humans. Electronic devices also use electricity, but a type called Direct Current (DC) at much lower voltages (3-5 volts) that is not harmful to humans. The current of this electricty can be used to carry data or control micro-switches inside electronic components. Electronic devices involve the use of transistors which allow the device to carry out basic logic computations. The data for these computatiosn is transmitted in binary form in the form of tiny electrical pulses coded as on (1) or off (0). Computers are multi-purpose electronic devices which can carry out instructions to accomplish a variety of unrelated tasks
learning resources	Electronic components on The Wikipedia Charles Babbage: Thought inventor of the modern computer on The Wikipedia Arithmetic logic units (ALUs) on The Wikipedia

key points

Electricity powers both "normal" electrical devices, such as ceiling fan or light bulb. Most household uses of electricty use a type called Alternating Current (AC) at 110V, which is dangerous to humans.
Electronic devices also use electricity, but a type called Direct Current (DC) at much lower voltages (3-5 volts) that is not harmful to humans. The current of this electricty can be used to carry data or control micro-switches inside electronic components.
Electronic devices involve the use of transistors which allow the device to carry out basic logic computations. The data for these computatiosn is transmitted in binary form in the form of tiny electrical pulses coded as on (1) or off (0).
Computers are multi-purpose electronic devices which can carry out instructions to accomplish a variety of unrelated tasks

learning resources

Electronic components on The Wikipedia

Charles Babbage: Thought inventor of the modern computer on The Wikipedia

Arithmetic logic units (ALUs) on The Wikipedia

Electricity vs. electronics vs. computers

Notes:

Classification exercise

Explore the specimens provided and classify each by their type: A) electrical only, B) electronic, or C) computer. Defend your category in the appropriate column:

#	Name	Category	Reason
1
2
3
4
5
6
7

System diagramming

In the space below, create your final draft of a non-computer system found somewhere here at CCAC;s West hills campus. Remember, include the following components in a well-made system diagram:

Each component is labeled with input and output location as appropriate
The stuff FLOW through the system is marked on each arrow connecting components (water, money, electricity, data, etc.)
System controls are located appropraitely and labeled (switches, doors, etc.)

Critique a diagram

Choose a non-computer diagram from CCAC's CIT-100 class. Review it for completeness. In the space below, list what the author of the digram did well and what the author should improve for a second draft of the diagram.

Name of digram_____________________