how to display signed binary in 7seg

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how many 7segs have you got?
without only 1, you're not gonna get very far.
 

If only one digit is available, a non-standard way would be to use the decimal point as a sign indicator. Some have decimal points on the left. Lighting one on the left could indicate a -1. [1] [0] [.1] Just an idea. Perhaps prone to operator error. Using segments B,C,G would look odd but unambiguous.

A wilder idea using the segment position:
1 - Segment A (Horizontal top)
0 - Segment G (Horizontal middle)
-1 - Segment D (Horizontal bottom)

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Do you want the logic for driving the segments or how to display the numbers? Before you can do the logic you need to decide how to display it.
 

TrickyDicky said:
how many 7segs have you got?
without only 1, you're not gonna get very far.
Click to expand...

i got 3 !
but I forgot to mention that my binary is on 8-bit signed

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I gessed that it will be easy
Lighting points ! i like the idea !

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BradtheRad said:
Paint over a small portion of the 'g' segment, the portion closest to the '1'.
Click to expand...

I will have to change my logic for that !
 

With 3 7segs you'll have to play around with encoding the 8-bits and sign into only 21 segments. The simplest approach to me is to lay the segments on their side.

_ _ _ _ _ _
|_|_| |_|_| |_|_|


As you can see there are 9 vertical segments. The segments are then read as ON-1 OFF-0 and the sign is the most significant segment and would read "-" when ON and "+" when OFF.

regards.
 

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