the schematics on the following pages show the … 2 to 5...3 build the given circuit used to...
TRANSCRIPT
1
2
3
Build the given circuit used to display numbers using a 7-segment display. The schematics on the following pages show the circuit using a common anode (CA) 7-segment display (M72) using the 74LS47 BCD to 7-segment active low decoder and the common cathode (CC) 7-segment display (M74) with the 74LS48 BCD to 7-segment active high decoder. 1) Select one of the designs (CA or CC) CA CC 2) Use the necessary datasheets 3) Show your instructor a schematic of your design (complete schematic showing
all the signals, name of signals, and pin numbers).
4) Simulate the circuit and show instructor the simulation result.
5) Build the circuit and show your instructor the working circuit.
Lab #2 Activity
Do not take the circuit apart as it is used in lab activity #3!
4
74LS47 BCD
To 7-seg
Decoder active Low
outputs
A0 A1 A2 A3
(A0 A3 signals are generated by using 4 Switches located on the digital module card)
CA 7-segment display
a
g
R
+5v
Common Anode 7-segment display design
470Ω
Lab #2 Activity
5
74LS48 BCD
To 7-seg
Decoder active High
outputs
A0 A1 A2 A3
(A0 A3 signals are generated by using 4 Switches located on the digital module card)
CC 7-segment display
a
g
R
Ground
470Ω
Common Cathode 7-segment display design
Lab #2 Activity
6
Lab #2 Activity
7
74LS47
74LS47 Connection Data
Lab #2 Activity
8
74LS47 Truth Table Lab #2 Activity
9
Common Anode: M72
Lab #2 Activity
10
Common Cathode: M74
Lab #2 Activity
11
12
Build a circuit that will add two 4-bit binary numbers (A0A3 and B0 B3). Use the 74LS83 full adder chip to perform this 4-bit addition. Display the sum value using the common anode 7-segment display or the common cathode display (M74 C/D) built in lab activity #2. As well, display the carry bit. A block diagram of this circuit is shown on the next two pages. 1) Show your instructor a schematic of your design (complete schematic showing
all the signals, name of signals, and pin numbers).
4) Simulate the circuit and show instructor the simulation result.
5) Build the circuit and show your instructor the working circuit.
Lab #3 Activity
Do not take the circuit apart as it is used in lab activity #4!
13
74ls83 4-bit Full Adder
BCD To
7-seg decoder
74LS47
A3 A2 A1A0 B3 B2 B1 B0
(Digital Module)
ag
CA 7-segment display
Cout
Cin GND
R 470 Ohms
+5 v Carry bit LED
Switches
A D
S0 S3
Lab #3 Activity
Common Anode 7-segment display design
14
74ls83 4-bit Full Adder
BCD To
7-seg decoder
74LS48
A3 A2 A1A0 B3 B2 B1 B0
(Digital Module)
ag
CC 7-segment display
Cout
Cin GND
470 Ohms
Gnd
A D
S0 S3
Lab #3 Activity
Carry bit LED Switches
R
Common Cathode 7-segment display design
15
16
Build a circuit that will add and subtract two 4-bit binary numbers (A0A3 and B0 B3). Use the 74LS83 full adder circuit, (used in lab activity #3), and add XOR gates to perform the 4-bit addition & subtraction. Display the sum value using the common anode 7-segment display or the common cathode display (M74 C/D) used in lab activity #3. A block diagram of this circuit is shown on the next two pages. 1) Show your instructor a schematic of your design (complete schematic showing
all the signals, name of signals, and pin numbers).
4) Simulate the circuit and show instructor the simulation result.
5) Build the circuit and show your instructor the working circuit.
Lab #4 Activity
Do not take the circuit apart as it is used in lab activity #5!
17
2’s Complement Adder &Subtract circuit
Carry bit LED
To 7-segment display circuit from lab activity #3
Lab #4 Activity
17
74ls86
18
19
Build a circuit that will compare two 4-bit binary numbers (A0A3 and B0 B3). Use the 74LS85 comparator chip to perform this 4-bit comparison. Display, using three LEDs, whether A = B, A > B or A < B. Use the adder circuit and the common anode 7-segment display or the common cathode display (M74 C/D) used in lab activity #4. A block diagram of this circuit is shown on the next two pages. 1) Show your instructor a schematic of your design (complete schematic showing
all the signals, name of signals, and pin numbers).
4) Simulate the circuit and show instructor the simulation result.
5) Build the circuit and show your instructor the working circuit.
Lab #5 Activity
20
74ls83 4-bit Full Adder
BCD To
7-seg decoder
74LS47
A3 A2 A1A0
(Digital Module)
ag
CA 7-segment display Cout
Cin
470 Ohms
+5v
A D
S0 S3
74ls85 4-bit C
omparator
A=B A>B A<B
Lab #5 Activity
LED
Switches
R
Common Anode 7-segment display design
B3 B2 B1 B0 74ls86
+
21
74ls83 4-bit Full Adder
BCD To
7-seg decoder
74LS48
A3 A2 A1A0
(Digital Module)
ag
CC 7-segment display Cout
Cin GND
470 Ohms
Gnd
A D
S0 S3
74ls85 4-bit C
omparator
A=B A>B A<B
Lab #5 Activity
Carry bit LED Switches
R
Common Cathode 7-segment display design
B3 B2 B1 B0 74ls86