# BILL OF MATERIALS

SL.NO COMPONENTS DESCRIPTION QUANTITY REQUIRED COST IN ₹
01 DC motor 12V 02 120
02 IR Sensor 01 25
03 Arduino Mega 2560 5V 01 1200
04 2 Channel Relay Module 01 70
06 Acrylic Sheets Thickness Of 5mm 01 -
07 Nut And Bolt 3mm 15 60
08 Jumper Wires Female To Female 10 50
09 Jumper Wires Male To Male 10 50
10 Jumper Wires Male To Female 10 50
11 Single Strand Wires Red, Yellow And Black ---- 20 cm Each 40
12 Buzzer 85db and 5V 01 80
13 Bread Board 400 Points Half Size 01 80
14 LEDs Red And Green 1 Each 10

# Mass of rack

• Volume= l * B* H

• 122cm * 3cm * 0.85cm

• = 311.1cm^3

• Density of material= 0.0118kg/cm^3

• mass= 0.00118 * 311.1

• 0.367kg

# Mass of pinion

• volume = 3.14 * R * R * h

• 3.14 * 1.5 * 1.5 * 3
• 21.195 cm^3

Mass = 0.00118 * 21.195.

• 0.025kg

# Mass of cleaning unit

• volume = L * B * H

• 87 * 3 * 2

• 552 cm^3

• Mass = 0.651 kg

# Mass of cleaning material

• volume = l * h * B
• 87 * 0.5 * 3 *130.11
• Mass = 0.1539

# Total mass = 1.2495

Torque = μ * total mass * g * perpendicular distance where g is 9.8 By solving above calculation

• Total torque * safety = 5.7
• Motor required = 30 rpm