ones and zeros

introductions

Conduct

Social Rules

  • No feigning surprise
  • No well-actuallys
  • No back-seat driving
  • No subtle-isms

recurse center <3

all your
feelings
are valid

ones and zeros

BETA!

(core content!)

(technical digressions!)

⚠ technical digression ⚠

ones and zeros

can you send messages
with just 1s and 0s?

how to count!

back to basics 🤓

the normal way

    1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, …

"Decimal"

"Base 10"

the normal way

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, …

"Decimal"

"Base 10"

first weird thing: from now on, we will start counting at zero

the normal way

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, …

"decimal"

"base 10"

something interesting happens here!

kill the 9s!

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, …

"base 9"

… 18, 19, 20, 21, …

… 88, 89, 90, 91, … 99, 100, 101, …

(animated)

kill the 9s!

0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, …

"base 9"

… 18, 20, 21, …

… 88, 100, 101, …

(animated)

how about the 8s!

0, 1, 2, 3, 4, 5, 6, 7, 10, 11, …

"octal"

"base 8"

… 16, 17, 20, 21, …

… 76, 77, 100, 101, …

(animated)

POWER

OF TWO!

farewell 7s…

0, 1, 2, 3, 4, 5, 6, 10, 11, 12, 13, 14, 15, 16, 20, 21, 22, 23, 24, 25, 26, 30, …

 

"base 7"

… 63, 64, 65, 66, 100, 101, …

(animated)

…

0, 1, 2, 3, 4, 5, 10, 11, 12, 13, 14, 15, 20, 21, 22, 23, 24, 25, 30, …

"base 6"

… 45, 50, 51, 52, 53, 54, 55, 100, 101, …

(animated)

…

0, 1, 2, 3, 4, 10, 11, 12, 13, 14, 20, 21, 22, 23, 24, 30, …

"base 5"

… 34, 40, 41, 42, 43, 44, 100, 101, …

(animated)

…

0, 1, 2, 3, 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 100, 101, …

"base 4"

(animated)

POWER

OF TWO!

…

0, 1, 2, 10, 11, 12, 20, 21, 22, 100, 101, …

"base 3"

(animated)

drumroll...

the last two digits!

the last two digits!

0, 1, 10, 11, 100, 101, 110, 111, …

"binary!!!!!!!!"

"base 2"

(animated)

POWER

OF TWO!

count to 10000

(in binary 😉)

places: decimal

eg: 9201

  • 9 in the thousands column
  • 2 in the hundreds column
  • 0 tens
  • 1  ones
place name
1 "ones"
10 "tens"
100 "hundreds"
1000 "thousands"

⚠ technical digression ⚠

places: decimal

eg: 9201

  • 9  * 1000 +
  • 2  * 100 +
  • 0 * 10 +
  • 1  * 1
place name
1 "ones"
10 "tens"
100 "hundreds"
1000 "thousands"

= 9000 + 200 + 0 + 1

= 9201

⚠ technical digression ⚠

places: decimal

eg: 9201

  • 9  * 1000 +
  • 2  * 100 +
  • 0 * 10 +
  • 1  * 1
place name aka
1 "ones" 100
10 "tens" 101
100 "hundreds" 102
1000 "thousands" 103

= 9000 + 200 + 0 + 1

= 9201

⚠ technical digression ⚠

places: binary!

place name i.e.
1 "ones" 20
10 "twos" 21
100 "fours" 22
1000 "eights" 23
1
1
10
2
11 3
100 4
101 5
110 6
111 7
1000 8
1001 9
1010 10

⚠ technical digression ⚠

places: binary!

eg: 1001

  • 1  * 8 +
  • 0 * 4 +
  • 0 * 2 +
  • 1  * 1
place name i.e.
1 "ones" 20
10 "twos" 21
100 "fours" 22
1000 "eights" 23

= 8 + 0 + 0 + 1

= 9

⚠ technical digression ⚠

send messages

with 1s and 0s?

hexadecimal

base 16!

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, …

⚠ technical digression ⚠

add some new digits here!

hexadecimal

base 16!

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, 10, 11, …

⚠ technical digression ⚠

12, 13, 14, 15, 16, 17, 18, 19, 1A, 1B, 1C, 1D, 1E, 1F, 20, …

… 99, 9A, 9B, 9C, 9D, 9E, 9F, F0, F1, F2, …

… F9, FA, FB, FC, FD, FE, FF, 100, 101, 102, …

POWER

OF TWO!

hardware setup

power up! 🔌

arduino

thermal printer guts

(snacks!)

(foreshadowing snacks!)

bits & bytes

00001111

000000111

00000011

0000001

00001111

000000111

00000011

0000001

1 =  1

2 + 1 =  3

4 + 2 + 1 =  7

8 + 4 + 2 + 1 = 15

1 =  1

2 + 1 =  3

4 + 2 + 1 =  7

8 + 4 + 2 + 1 = 15

= B

= D

= H

= P

?????

bits & bytes

how computers store information

separating numbers

delays? spaces? newlines?

...chord hits?

00000010000001100000011100001111

0

1

2

4

1

2

3

8

8

 256

9

512

  10

1024

17

131,072

18

262,144

25

33,554,432

= 33,949,455  :/

can you send messages
with just 1s and 0s?

"bytes"

if eggs came in packages of 8...

"bytes"

Every number is made of

exactly 8 bits (1s and 0s)

The highest number is only 255!

11111111 = 1 + 2 + ... + 127 = 255

00000010000001100000011100001111

00000010 00000110 00000111 00001111

= 2

= 6

= 7

= 15

= C

G

H

P ?????

ASCII!

dec hex binary ascii
65 0x41 0b01000001 A
66 0x42 0b01000010 B
67 0x43 0b01000011 C
68 0x44 0b01000100 D
69 0x45 0b01000101 E
70 0x46 0b01000110 F
71 0x47 0b01000111 G
72 0x48 0b01001000 H
73 0x49 0b01001001 I
74 0x4A 0b01001010 J
75 0x4B 0b01001011 K
76 0x4C 0b01001100 L
77 0x4D 0b01001101 M
78 0x4E 0b01001110 N
79 0x4F 0b01001111 O
dec hex binary ascii
80 0x50 0b01010000 P
81 0x51 0b01010001 Q
82 0x52 0b01010010 R
83 0x53 0b01010011 S
84 0x54 0b01010100 T
85 0x55 0b01010101 U
86 0x56 0b01010110 V
87 0x57 0b01010111 W
88 0x58 0b01011000 X
89 0x59 0b01011001 Y
90 0x59 0b01011010 Z

H

E

L

L

O

01001000 01000101 01001100 01001100 01001111

send messages

with 1s and 0s!

dec hex binary ascii
65 0x41 0b01000001 A
66 0x42 0b01000010 B
67 0x43 0b01000011 C
68 0x44 0b01000100 D
69 0x45 0b01000101 E
70 0x46 0b01000110 F
71 0x47 0b01000111 G
72 0x48 0b01001000 H
73 0x49 0b01001001 I
74 0x4A 0b01001010 J
75 0x4B 0b01001011 K
76 0x4C 0b01001100 L
77 0x4D 0b01001101 M
78 0x4E 0b01001110 N
79 0x4F 0b01001111 O
dec hex binary ascii
80 0x50 0b01010000 P
81 0x51 0b01010001 Q
82 0x52 0b01010010 R
83 0x53 0b01010011 S
84 0x54 0b01010100 T
85 0x55 0b01010101 U
86 0x56 0b01010110 V
87 0x57 0b01010111 W
88 0x58 0b01011000 X
89 0x59 0b01011001 Y
90 0x59 0b01011010 Z

???

00000010 00000110 0000111 00001111

[stx]

00000010 00000110 00000111 00001111

[ack]

[bel]

[si]

????

unicode

ò ж  ҈  ☂ 🙀

⚠ technical digression ⚠

text: it�s hard

bigger numbers

and other kinds of data

⚠ technical digression ⚠

binary solo

✨️

(snack break)

computers talking

to each other

protocol

hardware setup

talking to the printer 🗣️

send messages

with 1s and 0s!

send images

with 1s and 0s!

thermal printer art

The Counter Button

(Object #1)

 

Ailadi, 2018

WeAreNotListening

 

Alice Woods, Seb Potter, Betsy Fore,

Tim Regan (2013)

 

alicewoods.co.uk/weaenotlistening

Tape Recorders

Raphael Lozano-Hemmer (2011)

lozano-hemmer.com/tape_recorders.php

Remembering

 

Nitcha Fame Tothong (2018)

ones and zeros 2018-07-14

By Phil Schleihauf

Made with Slides.com

ones and zeros 2018-07-14

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