Online Development Notebook > Index > Misc Applications Information > Red 4 Digit 7 Segment Display

Red 4 Digit 7 Segment Display

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Display from old clock: Common cathode, red.

Pins left to right (1 to 14)

1  - Digit 3

2  - Segment a

3  - Digit 2

4  - Digit 1

5  - Segment e

6  -

7  - Segment d

8  -

9  - DP

10 - Segment c

11 - Digit 4

12 - Segment g

13 - Segment f

14 - Segment b

 

0 = abcdef

1 = bc

2 = abdeg

3 = abcdg

4 = bcfg

5 = acdfg

6 = acdefg

7 = abc

8 = abcdefg

9 = abcdfg

A = abcefg

b = cdefg

C = adef

d = bcdeg

E = adefg

F = aefg

- = g

{blank} = none of the segments

RobotBASIC Code to cycle 1234 across this display. Note that this test circuit does not use current limiting resistors, as the U401 (old style of board) is limited in the output current that is can produce.

 

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