8/17/2019 Vending Machine Class Activity

1/2

DIGITAL ELECTRONICS I – CETYS UNIVERSIDAD

STATE MACHINE EXAMPLE: VENDING MACHINE

• Release item after 15 cents are

deposited

• Single coin slots for dimes, nickels

• No change

Typical input !"u!nc!:• 3 nickels

• Nickel, dime

• Dime, nickel

•  Two dimes

#$ D%a& tat! 'ia(%a) uin( a M!aly Mac*in!

Present State Inputs D,N! Ne"t State #utput #pen$lip % $lops

inputs

Note: Outputs associated with transitions

8/17/2019 Vending Machine Class Activity

2/2

&' D%a& t*! +nal ci%cuit an' p%,c!!' &it* a i)ulati,n$