Printer Port 10 0 10 1 10 2 10 3 11000100 10 1000 * 0= 0 100 * 1= 100 10 * 6= 60 1 * 4 = 4 = 164...
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Transcript of Printer Port 10 0 10 1 10 2 10 3 11000100 10 1000 * 0= 0 100 * 1= 100 10 * 6= 60 1 * 4 = 4 = 164...
Printer Port
100 101 102 103
1 1000 100 10
1000 * 0 = 0
100 * 1 = 100
10 * 6 = 60
1 * 4 = 4
= 164
Decimal Binary
We use Ten Symbols
0 1 2 3 4 5 6 7 8 9
20 21 22 23
1 8 4
8 * 1 = 8
4 * 1 = 4
2 * 0 = 0
1 * 1 = 1
= 13
We use Two Symbols
0 1 or On Off or Hi Low or 0V 5V
2
1 6 4 1 1 0 1 2
OutputOutput
Data 1Data 0
Data 2
Data 4Data 5
Data 3
Data 6Data 7ACKBusy
Paper EmptySelect
Strobe
InputInput
1 14
13 25
Initialize Printer
Auto FeedError
Select Input
Pins 18 – 25 Pins 18 – 25 GroundGround
OutputOutput
InputInput
8 Data Outputs (378 H)8 Data Outputs (378 H)
4 Other Outputs (379 H)4 Other Outputs (379 H)
5 Data Inputs (37a H)5 Data Inputs (37a H)
1 14
13 25
-+
5V
VCC
470 ohm
LED
Printer Port
1 14
13 25
LED
470 ohm
5 V
D0D1
D7
D2
Printer Port
IN+
IN-
Comparator
¼ LM339
R43.3kohm
12V
VCC
R2100kohm
R3
10kohm
From
Printer Port
R5
R110kohm
3.3kohm
D400
1N4007D1
X
Y
K2
RELAY52
4
230 V ACL N
230V AC Motor
VA = R5 / (R1 + R5)
VA = 3.3 / 13.3
= 2.9 V
A
1 14
13 25
Printer Port
Switch
100 k
Preset
IN+
IN-
Comparator
10kohm
12V
To Printer
Port Input
100kohm
100kohm
52
4
5.6kohm
¼ LM339
LDR
1 M
Preset