The document discusses digital electronics, focusing on encoders and decoders, specifically their functionality in converting decimal input to BCD output and vice versa. It describes various types of decoders, such as 1-to-2, 2-to-4, and 3-to-8 decoders, as well as BCD-to-7-segment decoders that drive LED displays. Additionally, it includes examples and questions regarding the output of these decoders on a 7-segment display.

1. Elektronika Digital 3 –
Enkoder, Dekoder, 7 segment
Agus Ismangil

2. Dekoder dan Enkoder
A 0
A 1
A 2
A 3
A 4
A 5
A 6
A 7
ENCODER
O 0
O 1
O 2
A 0
A 1
A 2
O 0
O 1
O 2
O 3
O 4
O 5
O 6
O 7
DECODER
ONLY ONE INPUT
ACTIVATED AT A TIME
BINARY CODE OUTPUT
BINARY CODE INPUT
ONLY ONE OUTPUT
ACTIVATED AT A TIME

3. Binary Dekoding
Dekoder adalah suatu rangkaian logika yang memiliki sedikit masukan dan
banyak keluaran.

4. 1 to 2 Dekoder

5. 2 to 4 Dekoder

6. Rangkaian 2 to 4 Dekoder

7. 3 to 8 Dekoder

8. 3 to 8 Dekoder

9. Rangkaian 3 to 8 Dekoder

10. Enkoder Binary

11. ELECTRONIC ENCODER - DECIMAL
TO BCD
0
Decimal
to
BCD
Encoder
BCD output
Decimal input
0 0 0 0
5
0 1 0 1
7
0 1 1 1
3
0 0 1 1
• Encoders are available in IC form.
• This encoder translates from
decimal input to BCD output.

12. 10 line to 4 line Encoder

13. ENCODER
1
2
4
8
DECIMAL BINARY (BCD)
9 5V
8 5V
7 5V
6 5V
5 5V
4 5V
3 5V
2 5V
1 5V
74147
I9
I8
I7
I6
I5
I4
I3
I2
I1
A0
A1
A2
A3
10 line to 4 line Encoder

14. 0
1
2
3
4
5
6
7
8
9
DECODER
BINARY (BCD)
DECIMAL
1 0V
2 0V
4 0V
8 0V
74LS42
A3
A2
A1
A0
9
8
7
6
5
4
3
2
1
0
4 line to 10 line Decoder

15. BCD-to-
7-Segment
Decoder/
Driver
DECODERS: BCD TO 7-SEGMENT
DECODER/DRIVER
BCD input
0 0 0 0
Decimal output
LED
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
• Electronic decoders are available in IC form.
• This decoder translates from BCD to decimal.
• Decimals are shown on an 7-segment LED display.
• This IC also drives the 7-segment LED display.

16. BCD-to-
7-Segment
Decoder/
Driver
BCD input
Decimal output
0 0 1 1
?
Q #1- What is the decimal output from the decoder that
appears on the 7-segment display?
Answer: 3
Q #2- What is the decimal output from the decoder that
appears on the 7-segment display?
0 0 0 0
Answer: 0
Q #3- What is the decimal output from the decoder that
appears on the 7-segment display?
1 0 0 1
Answer: 9
Q #4- What is the decimal output from the decoder that
appears on the 7-segment display?
Answer: 7
0 1 1 1
Q #5- What is the decimal output from the decoder that
appears on the 7-segment display?
Answer: 6
0 1 1 0
TEST

18. BCD-TO-SEVEN SEGMENT DECODER DRIVER
5V
abcdef g .
V+
74LS47
A3
A2
A1
A0
test
RBI
g
f
e
d
c
b
a
RBO

19. 7-segmen display

20. Rangkaian Pengubah kode BCD ke LED 7-
segmen

21. Thankyou