1 Explain what is meant by active low inputs and active low

1. Explain what is meant by active low inputs and active low outputs.

2. Explain how an LED may be wired to illuminate on an active low.

3. Explain, with the aid of a sketch, how a seven-segment display could be wired to display the lower case alphabetic characters a, b, c, d, and the upper case alphabetic characters E and F.

Solution

1) ACTIVE LOW INPUTS AND ACTIVE LOW OUTPUTS ARE NOTHING BUT CONNECTING INPUTS AND OUTPUTS TO THE BUBBLED INPUT OR BUBBLED OUTPUT WHICH MEANS A COMPLEMENT REPRESENTATION

2) AN LED MAY BE GLOWED BY CONNNECTING A COMPLEMENT OF VARIABLE TO THE BUBBLED INPUT OR BUBBLE D OUTPUT WHUICH MEANS LOGIC 1