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Systems and Control - Electronics The Moisture Detector Tutor Group Name Date Moisture Detector Class Name Date Page 1 Identifying a Need Moisture Detector Class Name Date Specification. My product must: 1 Light up when the soil is moist. 2 Have neat soldering. 3 Be assembled very neatly. 4 Have an acrylic design that is related to gardening or the seasons. 5 Have an acrylic image that is easily recognised Page 2 Design Brief & Specification Design Brief I am going to design and make a moisture detector to place in a plant pot to indicate whether the soil needs watering or not. An LED will light up if the soil is moist. I will add an acrylic design to place at the top to make it more noticeable and attractive. Moisture Detector Class Name Date Page 3 Electronic Circuit Moisture Detector Class Name Date Page 4 My Electronic Circuit Moisture Detector Class Name Date Item Value/Type Factsheet 1 Battery snap PCBs 1 LED LEDs 1 Resistor 1 470R Resistors 1 Resistor 2 1K2 Resistors 1 Resistor 3 1K Resistors 1 Transistor BFY51 Transistors Page 5 Real-life & Track Diagrams No. Moisture Detector Class Name Date Page 6 Flow Chart of Etching Process Moisture Detector Class Name Date Page 7 Acrylic Backing Designs Moisture Detector Class Name Date Page 8 Vacuum Forming the Product Moisture Detector Class Name Date Page 9 Flow Chart of Soldering Process Page 10 Evaluation Moisture Detector Class Name Date PHOTOGRAPH OF FINISHED PRODUCT Moisture Detector Class Name Date Photo-sensitive Battery snap Printed Circuit Board (PCB) Brainstorm Resistor CAD Resistor colour code CAM Roland vinyl cutter Circuit diagram Side snips CNC Sodium hydroxide Copper track Solder wire Design Brief Soldering Etching Soldering iron Ferric chloride Specification Helping hands Thermoplastic High density polystyrene Transistor Laser cutter Ultra violet light box Light emitting diode (LED) Universal systems diagram Long-nosed pliers User Mask Vacuum former Mini drill Needs Page 11 Special Vocabulary Acrylic