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7-Segment Display

Tool for translating abcdefg codes (or binary or numeric codes) into 7-segment display (the name given to digital screens dedicated to numbers on alarm clocks, watches, etc.)

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7-Segment Display -

Tag(s) : Electronics, Substitution Cipher, Character Encoding

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7-Segment Display

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Tool for translating abcdefg codes (or binary or numeric codes) into 7-segment display (the name given to digital screens dedicated to numbers on alarm clocks, watches, etc.)

Answers to Questions

How does a 7 segment display works?

Basically, the display consists of 7 segments identified by a letter (from a to g), organized as follows: <b>7-segment</b> and each segment is generally associated with an LCD screen or a LED and can thus be activated / on 1 or off 0. There are a total of 128 possible combinations of display, although it is most often the combinations for the 10 digits (from 0 to 9) that are used.

How to encrypt with a 7 segment based cipher?

Segment combinations can represent characters. A combination is generally identified by a series of 1 to 7 letters (from a to g) corresponding to the activated segments.

It is also possible to identify them with a binary string 1 = active, 0 = inactive, starting from the end gfedcba. In this way a is 0000001 and g is 1000000

Example: char(127) has all active segments coded either abcdefg or 1111111

Example: char(92) has the 4 bottom segments active, coded either 'c, d, e, g' or 1011100

The 7-segments displays may be common cathode (CC) or common anode (CA), in this second case the 0 and 1 are switched.

How to decrypt a 7 segment cipher?

Associating an abcdefg code with a display consists of illuminating / activating the corresponding segments.

Example: abcdefg illuminates all segments and displays char(127)

Example: bcdeg illuminates segments b,c,d,e,g and displays char(94)

What is a common anode or common cathode display?

In a common cathode display, these are connected to the low potential, a segment is displayed by activating it in its logical 1 position.

In a common anode display, these are connected to the high potential, so a segment is displayed by activating it in its logical 0 position.

How to recognize a 7 segment ciphertext?

The code consists of the letters a,b,c,d,e,f,g only, in groups of 1 to 7 letters without repetition.

For the binary variant, the codes are normally on 7 bits from 0000000 to 1111111.

What are the variants of the 7 segment display?

There exists also 9 segment displays (with an additional 2 segment diagonal), 14 segments (with 2 diagonals and a central vertical bar) or 16 segments (identical to the 14 segments but with the top and bottom segments cut in half).

When 7 segment displays have been invented ?

The first patents date from the beginning of the 20th century (1903, 1908, 1910) but the advent of the displays came in the 1970s.

Source code

dCode retains ownership of the source code of the script 7-Segment Display online. Except explicit open source licence (indicated Creative Commons / free), any algorithm, applet, snippet, software (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt, encrypt, decipher, cipher, decode, code, translate) written in any informatic langauge (PHP, Java, C#, Python, Javascript, Matlab, etc.) which dCode owns rights will not be given for free. To download the online 7-Segment Display script for offline use on PC, iPhone or Android, ask for price quote on contact page !

Questions / Comments


Team dCode likes feedback and relevant comments; to get an answer give an email (not published). It is thanks to you that dCode has the best 7-Segment Display tool. Thank you.


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