10010011011000110 10010011011000110110000100010001000001000 1001001101100011011000010001000111000110110 00010 001
1000001000 100 10011 011 000110 110000 10001000 001000 11000010 010000 010001010001000001000 100100110 010 010
11
0
110000100010001000001000 1001001101 1000 110110000100010001000001000 1001001101 10001101100001000100010000 01
00 10010011011000110110 00010 001 1000001000 100 10011 011 000110 110000 10001000001000 11000010 010000 01000
010 11000110110 00010 001 1000001000 100 10011 011 000110 110000 1000 10000 01 000 11000 010 010000 010 010 01
010 0100010010011011000110 10010011011000110110000100010001000001000 10010011011000110110000100010001110001101
0010 001 1000001000 101000110110000100010001000001000 10010011011000110110 00010 001 1000001000 100 10011 011
110 110000 10001000001000 11000010 010000 01000 11000110110 00010 001 1000001000 100 10011 011 000110 110000
0 10000 01 000 1110 1100011011000010001000100000 000110 110000 10001000001000 11000010 010000 01000 110001101
BINARY BRACELETS
0
0
0
01
0
010 0
010
10
00
100 10
00010 001 1000001000 100 10011 011 000110 110000 1000 10010011011000110110 00010 001 1000001000 100 10011 011
Binary Code
We are oen used to representing numbers using ten digits: 0, 1,
2, 3, 4, 5, 6, 7, 8, and 9. This is called a base-10, or decimal system.
Binary code, however, uses only zeros and ones in a sequence of
eight spots. We oen to refer to these binary, or base-2, digits as
“bits.” Binary code is used to communicate information between
computers, communication devices, and many more modern
technologies. It’s useful to build into electronic devices because it
is a simple system that requires something turn on or off (where 1
is the on state and 0 is the off state).
This activity will allow you to embed your own name or nickname
in this secret code on a bracelet. The binary code for capital
leers is found on the back of this page.
Make a Binary Bracelet
1. Spell out your name on paper.
2
. Use the key (on back) to write out each leer in binary code.
3. Transform each leer to a colored bead. Choose one color
bead to represent the white squares (signifying “1”) and another
color to represent the black squares (signifying “0”). Between each leer you can add an
extra bead in a color of your choice as a divider. In computer science, separating markers
like this are called “delimiters.” Many encodings use delimiters, especially if the size of
each unit varies. You don’t actually need a delimiter to know when one character ends and
another begins in binary code, however, as each character requires exactly 8 bits.
4.
Cut a length of cording, sized to your wrist, with a few extra inches added on. For example,
if you have an approximate 6” wrist, add 4” of string for 10” total, or for an 8” wrist, add 4” of
string for 12” total. Make a triple knot to start the bracelet. Then string each of your bits and
delimiter beads on the string towards the knoed end.
5.
Holding the open end carefully, try wrapping it around your wrist to see how it fits and
looks. Note how much of the extra string you’ll need to slip the bracelet over your hand.
Once you’re satisfied, carefully knot the open end of string and then tie the two ends
together, leaving enough of that extra string to slip it over your hand.
6.
Cut off any remaining string, far enough away from the knots so they don’t loosen.
www.nasa.gov www.chandra.si.edu
GET CREATIVE!
Other colors besides
blue and purple can
be used, so choose
your favorite colors!
VOCABULARY
Binary Code/Coding Delimeter
A notation that utilizes only two Transformation from one A delimiter is one or more characters
options for each selection. representation to another. that separates text strings.
Bit Decode Encode
Short for “Binary Digit.” It is one Convert a coded message Convert a familiar message
digit’s location in a binary number. into something familiar. winto code.
10010011011000110 10010011011000110110000100010001000001000 1001001101100011011000010001000111000110110 00010 001
1000001000 100 10011 011 000110 110000 10001000 001000 11000010 010000 010001010001000001000 100100110 010 010
110000100010001000001000 1001001101 1000 110110000100010001000001000 1001001101 1000110110000100010001000001
10011011000110110 00010 001 1000001000 100 10011 011 000110 110000 10001000001000 11000010 010000 01000 010
00110110 00010 001 1000001000 100 10011 011 000110 110000 1000 10000 01 000 11000 010 010000 010 010 010 010 01
0010010011011000110 10010011011000110110000100010001000001000 1001001101100011011000010001000111000110110 0001
1000001000 101000110110000100010001000001000 10010011011000110110 00010 001 1000001000 100 10011 011 000110
000 10001000001000 11000010 010000 01000 11000110110 00010 001 1000001000 100 10011 011 000110 110000 1000
00 01 000 1110 11000110110000100010001000001000 10010011011000110110 00010 001 1000001000 100 10011 011 000110
BINARY BRACELETS
11
0 000
100
110 0
010 0
001
110
100
purple
D
blue
A
1D11111D
B
1D1111D1
C
IDIIIIDD
D
1D111D11
E
1D111D1D
F
IDIIIDDI
G
IDIIIDDD
H
1D11D111
I
1D11D11D
J
IDIIDIDI
K
IDIIDIDD
L
IDIIDDII
M
IDIIDDID
N
IDIIDDDI
O
IDIIDDDD
P
1D1D1111
Q
1D1D111D
R
IDIDIIDI
S
•o•o••oo
T
IDIDIDII
U
IDIDIDID
V
IDIDIDDI
W
IDIDIDDD
X
IDIDDIII
Y
IDIDDIID
Z
IDIDDIDI
WARNING Beads can be a choking hazard-Not for children under 3
I