3D Modelling

White Board

Rack

Pinion

Shaft

DC Motor

Duster

Arduino Mega

LEDs

Relay Board

Buzzer

Connectors

Rack And Pinion Mechanism

White Board Cleaner Outlook

Final Look

CIRCUIT DIAGRAMS

IR Sensor Circuit

Ultra Sonic Sensor Circuit

DC Motor Circuit

Clubbed Circuit With IR Sensor

Clubbed Circuit With Ultra Sonic Sensor

FLOW CHART

Indication Unit Flow Chart

Controlling Unit Flow Chart

Sensing Unit Flow Chart

Cleaning Unit Flow Chart

Final Flow Chart

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
05	Adaptor	12V And 5V Adaptor	01	150
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

Motor sizing and adaptor selection

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

Adaptor selection

Sl.no	Components	Quantities	Operating voltage	Operating current of each component	Total current
01	DC geared motors	1	12V	300mA	300×1= 300mA
02	Arduino mega 2560	1	5V	100mA	100×1=100mA
03	LED lighting	1	3.6v	30mA	30x1=30mA
04	ir sensor	1	3.3v	20mA	20×1= 20mA

• Factor of safety 1.2

• 0.3×1.2= 3.6A

• 0.1×1.2= 1.2A