# chap16 - ECEn/CS 224 Chapter 16 Homework Solutions 16.1...

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Last updated: 11/4/2006 ECEn/CS 224 Chapter 16 Homework Solutions 16.1 Draw the state graph for a car wash controller which has 3 different kinds of washes - a simple rinse-only wash, a rinse-soap-rinse wash, and a rinse-soap-rinse-blow dry wash. The first two of these wash types are the same as those in this chapter. State any assumptions you make as you create the state graph. Method 1 One way to solve this problem is to assume we have a separate piece of logic that can tell us if we will need to dry after the last rinse cycle. A state diagram which takes advantage of this logic is shown below. A list of our assumptions follows.

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Last updated: 11/4/2006 Inputs : Token, Start, T1_Done, T2_Done, T3_Done, DryFlag Outputs : Clr_T1, Clr_T2, Clr_T3, Spray, Soap, Dry, SetDryFlag, ResetDryFlag Assumptions : 1) The Spray signal turns on the Spray function 2) The Soap signal turns on the Soap function 3) The Dry output signal turns on the Blow Dry function 4) Timer 1 ( T1 ) is used to time the Spray function 5) Timer 2 (
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chap16 - ECEn/CS 224 Chapter 16 Homework Solutions 16.1...

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