digital fundamentals 10th edition system application

It will stay in the ble 'states' that the output can take.

The traffic signal controller intro- timer is off (T duced in Experiments 13 and 17 uses a small syn 3rd state: The counter shows 11, representing chronous counter to represent each of the four poss main-red, side-green. A synchronous counter forms the heart of many small It will go to the third state if the short digital systems. It will stay in the second state if the short timer is on (Ts). It will go to Resistors: two 330 n, six 1.0 kn, one to be deter the second state if the long timer is off mined by student and there is a vehicle on the side street (TLVs) 2nd state: The counter shows 01, representing Summary of Theory main-yellow, side-red.

It 74LS153 dual data selector will stay in the first state if the long One 150 HF capacitor timer is on or if there is no vehicle on Two LEDs the side street (TL VS. A state diagram, introduced in the text, is repeated in Figure 21-1 for reference Materials Needed Based on this state diagram, the sequential opera 7408 quad AND gate tion is described as follows: 7474 dual D flip-flop ist state: The counter shows the Gray code 00, 74121 one-shot representing main-green, side-red. The use of complemented variables indicates the opposite conditions. The three input After completing this experiment, you will be able variables are defined as follows Vehicle on side street V Complete the design of a sequential counter that is controlled by input variables 25 s timer (ong timer) is on TL O Construct and test the circuit from the first ob- 4 s timer (short timer is on Ts jective. Floyd, Digital Fundamentals, Tenth Edition CHAPTER 8: COUNTERS Experiment 21 The Traffic Signal Controller When certain conditions of these variables are met, Objectives the counter advances to the next state.

Digital fundamentals 10th edition system application