Ncert Exercises & Solutions

Two car garages have a common gate which needs to open automatically when a car enters either of the garages or cars enter both. Devise a circuit that resembles this situation using diodes for this situation.

Hint: We are getting output when any or both cars enter the gate.

Step 1: Find the output in each case.

As anyone or both cars enter the gate, the gate is opened.

The device is shown.

Step 2: Draw the truth table.

So, OR gate gives the desired output.

A	B	C
0	0	0
0	1	1
1	0	1
1	1	1

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