Figure 3-60 shows an application of logic gates that simulates a two way switch like the ones used in our homes to turn a light on or off from two different switches. Here the light is an LED that will be ON (conducting) when the NOR gate output is LOW. Note that this output is labeled

to indicate that it is active-LOW. Determine the input conditions needed to turn on the LED. Then verify that the circuit operates as a two-way switch using switches A and B. (In Chapter 4, you will learn how to design circuits like this one to produce a given relationship between inputs and outputs.)

Figure 3-60

Transcribed Image Text:

LIGHT