crazy-igzp
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how can I 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)
- - - Updated - - -
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.
Paint over a small portion of the 'g' segment, the portion closest to the '1'.