3.1 ESTABLISHING FUNCTIONS

Si No.	Functions from user perspective	Functions from Designer perspective
1	Accept the start command	accepting the response
2		initiating the start command
3		indicate the start of the machine
4		request the user for the insertion of lego-domino
5
6	loading of the lego-dominos	sense the presence of lego-dominos
7		movement of the lego-domino towards ejection compartment
8
9	selecting the direction	accept the direction command
10		display the directions
11		release and stacking of lego-domino in the favourable direction
12
13	turn off the machine	accepting off command
14		indicating the off command

|15||machine turns off

Function tree

3.2 MORPHOLOGICAL CHART

Sl No.	Subfunctions	Means 1	Means 2	Means 3	Means 4
1	Indication of start/stop of the machine	voice message	LCD screen	Panel kit with push button	LED light signal
2	loading of lego-domino
3	domino detection	IR sensor	Ultra sonic sensor	Proximity sensor	magnetic sensor
4	speed	dc motor	stepper motor	BLDC MOTOR	servo motor
5	Error detection	speaker	proximity sensor	retro reflecting sensor	photo electric sensor

Designs

Design 1: Adjacent stacking

Design 2 :One after one lego stacking machine

Design 3 : Flat lego stacking machine