1.1 interfacing sub-system

keypad

electric circuit

bill of material

interfacing sub-system

1.2 locking sub-system

push latch mechanism

latch

bolt

servo motor

flow chart

push latch mechanism

electric circuit

push latch mechanism

linkage mechanism

dc motor

flow chart

linkage mechanism

electric circuit

linkage mechanism

bill of material

locking unit

1.3 casing sub-system

right side

left side

top

bottom

back side

door

slots

screw

hinge

l-clamp

bill of material

casing sub-system