Say we have an LED that will turn on when driven with a low signalfrom the output of a single logic gate. The two inputs to the logic gateare a 3 Hz digital pulse generator and a switch that goes low when thegas in a car gets below a certain level. We'd like the LED to flash on andoff at 3 Hz when the gas gets low in the car. What type of single 2-inputlogic gate should be used in this situation? Draw the logic diagram.

The LED should turn on with a low signal.We want the LED to flash on and off at 3 Hz when the gas is…

Answered: Say we have an LED that will turn on…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

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Say we have an LED that will turn on when driven with a low signal
from the output of a single logic gate. The two inputs to the logic gate
are a 3 Hz digital pulse generator and a switch that goes low when the
gas in a car gets below a certain level. We'd like the LED to flash on and
off at 3 Hz when the gas gets low in the car. What type of single 2-input
logic gate should be used in this situation? Draw the logic diagram.

Expert Solution

Step 1: Understanding the Requirements

The LED should turn on with a low signal.
We want the LED to flash on and off at 3 Hz when the gas is low.
The 3 Hz pulse generator provides a continuous high and low signal at a 3 Hz frequency.
The gas switch provides a low signal when the gas is low.

From this, we can infer that the LED should be on when BOTH the 3 Hz signal is low AND the gas is low. This is a classic operation of an AND gate, but with inverted outputs. Thus, we would need a NAND gate. The NAND gate only gives a low output when both inputs are high.

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