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Elektronika dan Instrumentasi:
Elektronika Digital 3 –
Enkoder, Dekoder, 7 segment
Yusron Sugiarto
Materi Kuliah
Dekoder dan Enkoder
A0
A1
A2
A3
A4
A5
A6
A7
ENCODER
O0
O1
O2
A0
A1
A2
O0
O1
O2
O3
O4
O5
O6
O7
DECODER
ONLY ONE INPUT
ACTIVATED AT A TIME
BINARY CODE OUTPUT
BINARY CODE INPUT
ONLY ONE OUTPUT
ACTIVATED AT A TIME
Enkoder Binary
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.
10 line to 4 line Encoder
ENCODER
1248
DECIMAL BINARY (BCD)
9 5V
8 5V
7 5V
6 5V
5 5V
4 5V
3 5V
2 5V
1 5V
74147I9I8I7I6I5I4I3I2I1
A0A1A2A3
10 line to 4 line Encoder
Binary Dekoding Dekoder adalah suatu rangkaian logika yang memiliki sedikit masukan dan banyak keluaran.
1 to 2 Dekoder
2 to 4 Dekoder
Rangkaian 2 to 4 Dekoder
3 to 8 Dekoder
Rangkaian 3 to 8 Dekoder
0
1
2
3
4
5
6
7
8
9
DECODER
BINARY (BCD)
DECIMAL
1 0V
2 0V
4 0V
8 0V
74LS42
A3A2A1A0
9876543210
4 line to 10 line Decoder
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.
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
BCD-TO-SEVEN SEGMENT DECODER DRIVER
5V
abcdef g .
V+
74LS47A3A2A1A0
testRBI
gfedcba
RBO
7-segmen display
Rangkaian Pengubah kode BCD ke LED 7-segmen
Thankyou
