---

6.1 3-D Modelling

#Rahul Hegde: mini soil dispenser and seed dispenser:

#Aditya Phatak: Soil dispenser and assembly:

#Kiran Patil: dustbin and Trays:

Pralhad Yadawad: conveyor belt and assembly:

Final Assembly:

6.2 Circuit Diagrams

For DC motor of conveyer belt:-

For servo motor of soil dispensing unit:-

For seed dispensing unit:-

For mini soil dispensing

Final integrating circuit

6.3 Bill Of Material

Sl no	SPRINT	NAME OF CONSUMABLE	QUANTITY	SPECIFICATION
1	1	DC motor	1	60 RPM
2	1	Servo motor	3	sG90
3	1	Acrylic Sheet	1	200mm30mm5mm
4	1	Acrylic sheet	2	300mm30mm10mm
5	1	Thick Foam	4	20mm20mm10mm
6	1	Long Plastic support	6	5mm diameter,180mm length
7	1	L clamps	2	-
8	1	Plastic cylindrical pipe	1	50mm diameter,150mm length
9	1	Plastic cylindrical pipe	1	10mm diameter,300mm length
10	1	Rubber sheet	1	940 mm length,180mm breadth,7mm thickness
11	1	screw	6	-
12	1	Big cylindrical Shaft	2	70mm*180mm
13	1	Aurdino	2	Mega 2560
14	1	Relay	3	2channel
15	1	Tray	1	-
16	1	soil	-	-
17	1	seeds	-	-
18	1	resistors	-	-
19	1	wires	-	-

6.4 Algorithm

• Step 1:Start the conveyer belt.
• Step 2:Place the trays on the belt.
• Step 3:Moving trays stops at the soil dispensing unit and dispense soil.
• Step 4:: After the step 3, trays move towards the seedling unit.
• Step 5: Trays stops at seedling unit and dispense seeds.
• Step 6: After step 6, trays move towards another soil dispensing unit and dispense the soil again.
• Step 7: After that process, excessive soil collect in dust collector.
• Step 8: Seed sowing process completed.

6.5 Motor Sizing

Motor sizing for DC motor

• Total Weight = 0.25 kg
• Co-efficient of friction between Acrylic sheet and Foam board = 0.7
• Total Frictional Force = 0.25 x 0.7 = 0.175 kg
• Radius of action = 1 cm
• Torque generated = 0.175 kg-cm
• Torque after Factor of Safety = 0.175 x 1.5 = 0.2625 kg-cm
• Therefore, selected motor for above calculated torque requirement is 60 rpm motor.

Motor Sizing for Servo motor

• Total Weight = 0.1 kg
• Total Force = 0.1 kg
• Radius of action = 1 cm
• Torque generated = 0.1 kg-cm
• Torque after Factor of Safety = 0.1 x 1.5 = 0.15 kg-cm
• Therefore, the selected motor for the above-calculated torque requirement is Tower MG90 motor.

Adapter Sizing

For DC Motor * Voltage required to run DC Motor = 12V

• Current drawn by motor at full load = 300 mA
• Number of DC Motors = 1
• Total current required = 1 * 300 = 300 mA
• Current required after factor of safety of 1.2 = 1.2 * 300 = 360 mA
• Therefore Adapter required for DC Motor should be rated 12V, 1A.

For Servo Motor

• • • Voltage required for servo motor = 5V
• • • Stall current of Servo motor = 660 mA
• • • Number of Servo motors = 3
• • • Total current required = 3* 660 = 1980 mA
• • • Current required after factor of safety of 1.2 = 1.2 * 1980 =2376mA
• Therefore Adapter required for Servo Motor should be rated 5V, 5A.