Different Sequence And Timing For The ‘Motors’ - Engineering Assignment

Internal code: MAS5791

Engineering Assignment

  We will be modelling the motors (or rather, the switches for the motors) using a set of 3 LEDs – one red, one yellow and one green. So turning an LED on represents the corresponding motor being turned on-Our task is to control the 3 motors. Inputs via a 12-key keypad that will allow users to select one of a series of preset programs. Each program has a different sequence and timing for the ‘motors’ Question: 1. User calls up the user-defined option by selecting ‘0’. 2. User enters how long the RED ‘motor’ should be on in minutes and seconds (up to 80 minutes). 3. User starts program by pressing ‘#’. The appropriate motor is turned on and a ‘countdown timer’ is displayed on LCD showing how long is left before motor turns off. 4. If the user presses ‘#’ before the countdown reaches zero, the program is ‘paused’. The motor is turned off, and the countdown timer stops. Pressing ‘#’ again causes program to resume – motor is turned on and the countdown continues. 5. When countdown reaches zero (0 mins and 0 secs), the motor will stop and system comes out of user program mode. Note: The system still has to comply with all safety constraints stated above.