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Engineering design: A model of notification post box
- 1. A MODEL OFNOTIFICATION BOX: “NOTIBOX” GROUP 61 ENGINEERING TEAM PROJECT Date: 14/10/2009 Venue: 21.01.05
- 2. Group Members • MuhammadTaufiq Bin Roslan 11608 • Shalini Subramaniam 9698 • Ahmad Ariff Bin Jamaludin 9722 • Siti Nadiah Binti Jamaludin 10202 • Muhammad Syafiq Bin Mohd Ariffin 10228 • Aliya Binti Mhd Zahir 11657 Supervisor: Dr Mokhtar B Awang 2Engineering Team Project Group 61
- 3. Contents 1. Background 2. Problemstatement 3. Objectives 4. Literature Review 5. Materials 6. Methods 7. Results 8. Drawing 9. Discussion 10. Project Planning 11. Conclusion & Recommendations 3Engineering Team Project Group 61
- 4. Background The main functionof the “Notibox” is to notify the user when there is/are letter(s) inside the letter box. The notification is only given when the user open the house main door. 4Engineering Team Project Group 61
- 5. Problem Statement These problemsoccur when the user is not in the house when the letter is delivered: Important letters are uncollected Delay in responding urgent letters Stealing and destruction of the letters 5Engineering Team Project Group 61
- 6. Objectives Objectives of thissystem are: To notify user about urgent letters To preserve the condition of the letters To modify the existing letter box 6Engineering Team Project Group 61
- 7. Literature Review • Asensor according to www.wikepedia.com is a device that measures a physical quantity and converts it into a signal. • A buzzer referring to www.wikepedia.com is a signaling device. • A light-emitting diode (LED) is an electronic light source. The description is from www.wikepedia.com. • The micro switch is an electrical switch. The description is from www.wikepedia.com. Engineering Team Project Group 61 7
- 8. Material Function Adaptor Providepower Zinc plate Act as the sensor Micro switch Trigger the buzzer Buzzer Generate sound Light –emitting diode (LED) Give signal Materials Materials used: 8Engineering Team Project Group 61
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- 10. Switch 1 (Door) Switch2 (sensor) Close Open Close (letter) circuit on LED& BuzzerCircuit off Results • Working principles: 10Engineering Team Project Group 61
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- 12. Front view ofthe prototype Sensor LED Micro switch Buzzer 12Engineering Team Project Group 61
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- 14. The system 14Engineering TeamProject Group 61
- 15. Material Advantages Disadvantages ZincLow malleable Low creep strength Aluminum Lightweight Highly Malleable Discussion Justification for chosen materials: Sensor 15Engineering Team Project Group 61 Material Advantages Disadvantages Zinc Low malleable Low creep strength Aluminum Lightweight Highly Malleable
- 16. Material Advantages Disadvantages Microswitch Cheap Low sensitivity Reed Switch Sensitive Fragile Material Advantages Disadvantages Adaptor Longer life time High cost Battery Cheap Low life time Switch & Power Supply 16Engineering Team Project Group 61 Material Advantages Disadvantages Micro switch Cheap Low sensitivity Reed switch Sensitive Fragile Material Advantages Disadvantages Adaptor Longer life time Costly Battery Cheap Low life time
- 17. Problem Solution Foreign objectsSet a minimum load Sensor exposed to heat Use plywood at the edge Glue will melt Replace with small screws Potential problems and solutions: • In real life: a. LED and buzzer will be inside the house b. Micro switch will be replaces by reed switch • The minimum weight sensor can detect is 70g. 17Engineering Team Project Group 61 Problem Solution Foreign objects Set a minimum load Sensor exposed to heat Use plywood as support Melting of glue Replace with small screws
- 18. Overall cost ofthe prototype is only RM 23.00 Engineering Team Project Group 61 18 Materials Cost LED (40units*RM0.10) RM4.00 Wire RM 0.30 Zinc plate RM 0.40 Resistor (5 units*RM 0.30) RM 1.50 Micro switch RM 0.50 Adaptor RM 10.00 Buzzer RM 3.00 Electrical board RM 3.00 Total RM 23.00
- 19. Project Planning Name Tasks TaufiqSensor assembly Shalini Fixing of speaker and LED Nadiah Circuit assembly Aliya Engineering Drawing Afiq Lighting(LED) Syafiq Design of the house Engineering Team Project Group 61 19
- 20. Conclusion & Recommendations We successfullydesigned a better letter box than the existing letter box. We would like to recommend “Notibox” because it is cheap with simple mechanism and very helpful in making our life more organized. 20Engineering Team Project Group 61
- 21. THE END Q&A 21Engineering TeamProject Group 61