751 Encoder 7 segments display
751 : Encoder 7 segments display
- Author: TECNM.TESVG EQUIPO 5511
- Description: Encoder for test 7 segment
- GitHub repository
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- Clock: 0 Hz
How it works
A BCD to 7-segment encoder is a digital logic circuit that converts a Binary-Coded Decimal (BCD) input into signals that can drive a 7-segment display. BCD represents decimal digits 0–9 in 4-bit binary:
Working Principle The circuit maps each BCD input to the combination of segments that forms the corresponding decimal digit on the 7-segment display. For example, to display 0, segments a, b, c, d, e, f are ON, and g is OFF. AND EXTRA GATES INCLUDE CONTROL OF POINT
How to test
Outputs 7 segments of the display: a, b, c, d, e, f, g Each output controls one segment. A high (1) signal lights up the segment, and low (0) turns it off. Optional DP (decimal point) can also be controlled.
| Decimal | BCD (D3 D2 D1 D0) | a | b | c | d | e | f | g |
|---|---|---|---|---|---|---|---|---|
| 0 | 0000 | 1 | 1 | 1 | 1 | 1 | 1 | 0 |
| 1 | 0001 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
| 2 | 0010 | 1 | 1 | 0 | 1 | 1 | 0 | 1 |
| 3 | 0011 | 1 | 1 | 1 | 1 | 0 | 0 | 1 |
| 4 | 0100 | 0 | 1 | 1 | 0 | 0 | 1 | 1 |
| 5 | 0101 | 1 | 0 | 1 | 1 | 0 | 1 | 1 |
| 6 | 0110 | 1 | 0 | 1 | 1 | 1 | 1 | 1 |
| 7 | 0111 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| 8 | 1000 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 9 | 1001 | 1 | 1 | 1 | 1 | 0 | 1 | 1 |
DP can be controled with 4,5 and 7 pins using gates AND, OR with 4, 5 inputs and 7 for select.
External hardware
List external hardware used in your project (e.g. PMOD, LED display, etc), if any this uses default hardware, leds and logic input.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | BIT3 | a | |
| 1 | BIT2 | b | |
| 2 | BIT1 | c | |
| 3 | BIT0 | d | |
| 4 | e | ||
| 5 | f | ||
| 6 | g | ||
| 7 | dp |