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IEEE Circuits Workshop

11am & 1pm

By Ethan Sifferman

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What is a Circuit?

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What is a Circuit?

A collection of parts to create an electric current.

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What is Electricity?

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What is Electricity?

The flow of electrons from molecules to other molecules.

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What is Electricity?

Electrons more easily flow through molecules with weak bonds.

Copper- weak bond, conductor

Plastic, strong bond, insulator

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Semiconductors!

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What is a Circuit?

A collection of parts composed of insulators, conductors, and semiconductors, so that electrical engineers can cause a flow of electrons to achieve some desired result.

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How are circuits designed?

Voltage - how positively ionized a material is

Resistance - how much a material resists a flow in electrons

Current - how fast electrons are moving

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Ohm’s Law:

V = I · R

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Practice

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LED Circuits

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Series vs. Parallel

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Buttons

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What is a Digital Circuit?

A circuit where voltages are simply analyzed as “on” or “off”.

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  • On, High, 1
  • Off, Low, 0

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Logic Gates

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Binary

Decimal

Binary

0

1

2

3

4

5

6

7

8

0000

0001

0010

0011

0100

0101

0110

0111

1000

Decimal

Binary

0 + 0 = 0

0 + 1 = 1

1 + 0 = 1

1 + 1 = 2

0 + 0 = 00

0 + 1 = 01

1 + 0 = 01

1 + 1 = 10

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Half Adder

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Full Adder

Decimal

Binary

0 + 0 + 0 = 0

0 + 0 + 1 = 1

0 + 1 + 0 = 1

0 + 1 + 1 = 2

1 + 0 + 0 = 1

1 + 0 + 1 = 2

1 + 1 + 0 = 2

1 + 1 + 1 = 3

0 + 0 + 0 = 00

0 + 0 + 1 = 01

0 + 1 + 0 = 01

0 + 1 + 1 = 10

1 + 0 + 0 = 01

1 + 0 + 1 = 10

1 + 1 + 0 = 10

1 + 1 + 1 = 11

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Full Adder

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7486 (XOR)

4081 (AND)

Carry

Sum

Button

Pull-Down Resistors

Sum LED

Carry LED