Practice IB Design Technology (First Exam 2027) Topic A3.4 Introduction to Electronic Systems with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for A3.4 Introduction to Electronic Systems and mirrors Paper 1, 2 style where relevant.
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A company is designing everyday electronic devices for public and home use that integrate basic input and output systems to improve usability and efficiency.
They start with a digital bathroom scale that uses a strain gauge to sense weight and display results.
State the input signal produced by a strain gauge.
Outline two roles of the microcontroller inside the digital scale.
To promote hygiene in public bathrooms, the company develops a touchless automatic faucet system using infrared sensing.
Identify the type of output component used to release water.
Explain how the electronic system ensures water only flows when hands are detected.
In a final product concept, they create a kitchen appliance that uses a capacitive touch panel and piezo buzzer to improve safety and control.
Describe how the capacitive touch panel and piezo buzzer work together to improve user experience.
Evaluate the advantages and limitations of using capacitive sensors and piezo buzzers in high-use home appliances.
How does a digital system process and use information?
In the sensor circuit shown below, why is it critical that the operational amplifier possesses a very high input impedance?
What is the primary role of the cylindrical components shown on this electronic circuit board?