5.1 Circuit Diagram

5.2 Flow Chart

5.3 3D Modelling

5.4 Mechanisms and Resource Specification

Density of acrylic sheet=1.15 g/cm^3

Seive

seive d=27.4cm,h=3cm

holes d=0.508cm, h=1.506cm

volume=cylinder volume-no of holes*(one hole valume)

  =(pi*r^2*h)-(250*(pi*r^2*h))

  =(3.14*(27.4/2)^2*3)-(250*(3.14*(0.508/2)^2*1.506)

  =1768.039-76.3

  =1691.739 cm^3

M1= density * volume of seive

 =1.15*1691.739 

 =1946 gram     

Differntial gears

radius=1cm

volume of gear = 3 *4 / 3 * 3.14 * 1^3

              =12.568cm

M = density of plastic*volume of gear

 =0.95 * 12.568

 =11.9396 g

Linkages

rectangle l=18cm,b=2cm,h=0.5cm

hole d=1cm,h=0.5cm

half cylinder d=2cm,h=0.5cm

volume=(rectangle + half cylinder)-(2 small holes)

  =(l*b*h + pi*r^2*h)-(2*(pi*r^2*h))

  =(18*2*0.5 + 3.14*1^2*0.5)-(2*(3.14*1/2^2*0.5))

  =19.57-0.785398

  =18.78 cm^3

M2 = Density * linkage volume

  =1.15 * 18.78

  = 21.609 gram

5 equal linkages hence

M = 21.609*5

  =108.01 gram

TOTAL MASS

Total Mass = Seive Mass + Motor Mass + 5 Linkages mass + mass of gears

       = 1949.8 + 108.01 +35.81
       
       = 2096 g

       = 2.096 kg

L = 2.096 kg

Load on single motor = L/2

                 = 2.096/2
                 
                 = 1.048 kg

F = m * u * g

 = 1.048 * 0.8 * 9.8

 = 8.21 kg-cm

Force in newton = 8.21 * 9.8

              = 80.4 N

TORQUE CALCULATION

T = F * R

=80.4 * 3.175 *10^-2

=2.55 Nm

considering safety factor = 2.55* 1.5

                      =3.8 kg-cm

corresponding each motor speed = 60 rpm

Adapter Selection

Sl.no	Components used	Quantity	Operating voltage (in V)	Current rating(in A)
1	Arduino mega 2560	1	5	0.5
2	Bluetooth	1	5	0.02
3	DC motor	1	12	0.3
4	Relay module	1	12	0.2

• Summation of current ratings of components operating on 5V = 0.52 x 1.5(Factor of safety)= 0.78
• Summation of the current ratings of components operating on 12V = 0.5 x 1.5(Factor of safety) = 0.75
• Based on the above calculations we come to a conclusion that we require a 5V, 1A adapter for components operating on 5V and a 12V, 1A adapter is required for components operating on 12V.

POWER CALCULATION

Components	Voltage(v)	Current(mA)	Power=V * I(w)
DC Motor	12	300	3600
HC-05 Bluetooth	5	20	100
Aurdiono	5	500	2500
Relay	12	150	1800

Total Power Required = 3600 + 100 + 2500 +1800 =8000 mw = 8w

SUSTAINABLE ENERGY CALCULATION

Embodied Energy Calculation

consumables	specifications as per BOM(length,width,and thickness are in meters	Qty	Total weight(kg)	Unit Embodied energy(MJper kg)	Total Emboided energy(MJ)
Acrylic sheet for base plate	L=0.4, b=0.28, t=0.002, v=0.000224, w=2.576*10^-4	1	2.576*10^-4	117	0.301392
Acrylic sheet for top plate	l=0.32, b=0.28, t=0.002, v=0.0001792, w=2.0608*10^-4	1	2.0608*10^-4	117	0.024111
Acrylic sheet for link of sieve	l=0.06,b=0.02, t=0.002, v=2.410^-6, w=2.7610^-6	4	1.104*10^-5	117	1.29168*10^-3
Acrylic sheet for legs of machine	l=0.30, b=0.05, t=0.002, v=310^-5, w=3.4510^-5	4	1.38*10^-4	117	0.016
Acrylic sheet for link of DC motor	l=0.07, b=0.025, t=0.002,v=3.510^-6, w=4.02510^-6	4	1.61*10^-5	117	1.8837*10^-3
Acrylic sheet for leg of DC motor	l=0.20, b=0.06,t=0.002, v=2.410^-5, w=2.7610^-5	2	5.52*10^-5	117	6.45*10^-3

Total Embodied Energy=0.3507