70016 Parallax Inc, 70016 Datasheet - Page 56

• Manufacturer Part Number: 70016
• Description: TEXT INFRARED REMOTE FOR BOE-BOT
• Manufacturer: Parallax Inc

Specifications of 70016

• Accessory Type: Manual
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Boe-Bot®
• For Use With: 29122 - KIT PARTS IR REMOTE FOR BOE-BOT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

Counting in Binary vs. Counting in Decimal
Here is how to count to 20 with binary numbers:
Notice that it takes four or less binary digits to count to 15, but it takes a fifth digit to get
to 20.
In binary numbers, digits are usually called bits. Whereas a digit can be 0 through 9 in
the decimal number system, a bit can only be 1 or 0 in the binary number system. Figure
2-1 shows a map of the bits in a byte size binary number. The rightmost bit is bit-0, the
next one over is bit-1, then bit-2, all the way through bit-7.
Each bit in a binary number tells you how many of a certain power of 2 the number
contains. Bit-0 tells you how many ones are in the binary number, bit-1 tells how many
twos, bit-2 tells how many fours, and so on. Even if you have a really large binary
number, you can always figure out a given bit value because it's 2
Here is an example of how to take 2 and raise it to the power of its bit position. Bit-0
tells how many ones are in a binary number because 2
many twos are in the number because 2
number because 2
because 2
Figure 2-2 shows how to convert a binary number with up to 8 bits (a byte) to its
corresponding decimal value.
Binary
Decimal
Binary
Decimal
6
= 2×2×2×2×2×2 = 64.
1100 1101 1110 1111 10000 10001 10010 10011 10100
0
12
0
2
= 4. Bit-6 indicates how many sixty-fours are in a binary number
1
1
13
10
2
14
11 100 101 110 111 1000 1001 1010 1011
3
4
15
1
= 2. Bit-2 tells how many fours are in the
5
16
6
7
17
0
= 1. Likewise, bit-1 tells how
8
Figure 2-1
The Bits in a
Binary Byte
Each box can
hold either a 1 or
a 0.
18
bit
.
9
10
19
11
20