18 Questions
What is the purpose of the Safety Guard in the laser cutter?
To ensure the machine only operates when the extraction system is on
What is the advantage of using ICs with NAND gates over those with AND, OR, and NOT gates?
They are more versatile and can be used in a wider range of applications
What is the output of a NAND gate when both inputs are 1?
0
What is the purpose of the gear train in the metal turning lathe?
To drive the headstock of the lathe
How can each gear be secured to its shaft?
By using a keyway and key
What is the Velocity Ratio (VR) calculated for in the compound gear train?
To find the rotational velocity of the driver gear
What is the primary purpose of morphological analysis and reverse engineering in the development of new products?
To analyze and improve existing products
What is the benefit to the client of using CAD and CAM to produce bespoke custom made products?
Customization to meet specific needs
What is the function of piezoelectric transducers in electronic products?
To convert mechanical energy into electrical signals
What is the advantage of using iterative development processes in product design?
Refining and improving the product design through multiple prototypes
What is the primary benefit of using electronic products that interact with the environment?
Improved performance
What is the purpose of revitalizing traditional products?
To modernize and improve the product design
What is the primary purpose of the mobility scooter seat adjustment system?
To accommodate users of varying sizes
What is the voltage of the motor used to power the mobility scooter?
24 Volt
What type of transistor is used in the circuit to control the 5 Volt motor?
Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET)
What is the purpose of the relay switch in the modified circuit?
To link the 5 Volt microcontroller circuit to a 24 Volt Motor
Why would the mobility scooter require further modifications for severely disabled people?
To improve its accessibility features
What is the primary reason for designing a seat adjustment system in the mobility scooter?
To accommodate users of varying sizes
Study Notes
Laser Cutter Safety
- The laser cutter should not operate until the Safety Guard has been closed and the extraction system has been turned on.
- A Quad Input AND gate integrated circuit (IC) can be used to ensure that the machine will not operate until two sensors have been activated.
ICs in Preference
- ICs that contain NAND gates are often used in preference to those that contain AND, OR, and NOT gates.
NAND Gate
- A NAND gate has a truth table with the following inputs and outputs:
- Input A: 0, Input B: 0, Output Q: 1
- Input A: 0, Input B: 1, Output Q: 1
- Input A: 1, Input B: 0, Output Q: 1
- Input A: 1, Input B: 1, Output Q: 0
Compound Gear Train
- A compound gear train is used to drive the headstock of a metal turning lathe.
- The Velocity Ratio (VR) and Rotational Velocity (RV) can be calculated for the gear train.
- Each gear needs to be secured to its shaft to prevent slipping when subjected to a rotational force.
Gear Securing
- Gears can be secured to their shafts using a mechanism that prevents rotational force from causing slipping.
Design and Technology
- Design and technology processes involve iterative development, morphological analysis, and reverse engineering.
- Morphological analysis and reverse engineering can benefit the iterative development process.
- Computer Aided Design (CAD) and Computer Aided Manufacture (CAM) can be used to produce bespoke custom-made products.
Bespoke Products
- The advantages of using CAD and CAM to produce bespoke products include benefits to the client and manufacturer.
Piezoelectric Transducers
- Piezoelectric transducers can be used to measure changes in pressure, acceleration, temperature, strain, or force by converting signals into an electrical charge.
- This technology can be used to improve the performance of products such as humanoid robots and voice-controlled smart speakers.
Mobility Scooter
- The design of a modern mobility scooter can be analysed based on specification points.
- A mechanical system can be designed to allow the seat of a mobility scooter to be easily adjusted and securely locked in position.
- A 24 Volt DC motor can be controlled by outputs from a Microcontroller using a MOSFET Transistor or relay switch.
- The mobility scooter can be modified for use by more severely disabled people.
Test your knowledge of engineering design with this A-Level Design and Technology quiz, covering topics such as design principles, materials, and manufacturing processes. This quiz is based on the AS Unit 1 exam and is suitable for students preparing for the exam.
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