Digital Trainers

Digital Analog

Your Assignment: Write your name in digital code. Use this website for information

Letter	Binary Code	Letter	Binary Code	Letter	Binary Code	Letter	Binary Code
A	01000001	a	01100001	N	01001110	n	01101110
B	01000010	b	01100010	O	01001111	o	01101111
C	01000011	c	01100011	P	01010000	p	01110000
D	01000100	d	01100100	Q	01010001	q	01110001
E	01000101	e	01100101	R	01010010	r	01110010
F	01000110	f	01100110	S	01010011	s	01110011
G	01000111	g	01100111	T	01010100	t	01110100
H	01001000	h	01101000	U	01010101	u	01110101
I	01001001	i	01101001	V	01010110	v	01110110
J	01001010	j	01101010	W	01010111	w	01110111
K	01001011	k	01101011	X	01011000	x	01111000
L	01001100	l	01101100	Y	01011001	y	01111001
M	01001101	m	01101101	Z	01011010	z	01111010
space bar	00100000			period (.)	00101110

Digital Vs. Analog Technologies

What are Digital technologies? What are Analog technologies? Which are better?

•

Digital is breaking the signal into a binary format where the audio or video data is represented by a series of "1"s and "0"s

•

256

128

on/off

1/0

binary

decimal

plus

Answer

Digital technologies use 1’s and 0’s to control circuits. 1’s and 0’s are controlled by logic gates. •Some logic gates used are:

•AND, OR, NOT, NAND, NOR, XOR, and XNOR.

AND Gates			OR Gates			NOT Gates
A * B = AB			A + B = A+B			A = NOT A
1 * 1 = 1 or 1 * 0 = 0			1 + 1 = 1 or 1 + 0 = 1			1 = 0 or 0 = 1

2 Input AND Gate			2 Input OR Gate			NOT Gate
A	B	Output Q	A	B	Output Q	A	Not A
0	0	0	0	0	0	0	1
0	1	0	0	1	1	1	0
1	0	0	1	0	1
1	1	1	1	1	1

1’s and 0’s

•A 1 represents a true statement, also it means ON

•A 0 represents a false statement, also it means OFF

NAND Gates			NOR Gates			XOR Gates
A * B = NOTAB			A + B = NOTA+B			A is NOT= to B
1 * 1 = 0 or 1 * 0 = 1			1 + 1 = 0 or 1 + 0 = 0			1 + 0 = 1 or 0 + 1 = 1

2 Input NAND Gate			2 Input NOR Gate			2 Input XOR Gate
A	B	Output Q	A	B	Output Q	A	B	Output Q
0	0	1	0	0	1	0	0	0
0	1	1	0	1	0	0	1	1
1	0	1	1	0	0	1	0	1
1	1	0	1	1	0	1	1	0

Logic Gates http://www.kpsec.freeuk.com/gates.htm Logic gates process signals which represent true (1, high, +Vs, on) or false (0, low, 0V, off). For more information please see the Logic Gates page. There are two sets of symbols: traditional and IEC (International Electrotechnical Commission).
Gate Type	Traditional Symbol	IEC Symbol	Function of Gate
NOT			A NOT gate can only have one input. The 'o' on the output means 'not'. The output of a NOT gate is the inverse (opposite) of its input, so the output is true when the input is false. A NOT gate is also called an inverter.
AND			An AND gate can have two or more inputs. The output of an AND gate is true when all its inputs are true.
NAND			A NAND gate can have two or more inputs. The 'o' on the output means 'not' showing that it is a Not AND gate. The output of a NAND gate is true unless all its inputs are true.
OR			An OR gate can have two or more inputs. The output of an OR gate is true when at least one of its inputs is true.
NOR			A NOR gate can have two or more inputs. The 'o' on the output means 'not' showing that it is a Not OR gate. The output of a NOR gate is true when none of its inputs are true.
EX-OR			An EX-OR gate can only have two inputs. The output of an EX-OR gate is true when its inputs are different (one true, one false).
EX-NOR			An EX-NOR gate can only have two inputs. The 'o' on the output means 'not' showing that it is a Not EX-OR gate. The output of an EX-NOR gate is true when its inputs are the same (both true or both false).