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Flip to reveal answersWhat is a servo, and when is one used?
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All 4 Flashcards — Outputs in use
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Question
What is a servo, and when is one used?
Answer
A motor, gearbox, position sensor and control circuit in one unit that moves to a commanded angle and holds it. Use one wherever a precise position matters.
Question
When is an LCD the right output?
Answer
When the user needs specific information — a temperature, a countdown, a fault code. A light can say something is wrong and never what.
Question
Why use a relay rather than a transistor?
Answer
It carries far larger currents and keeps the two circuits electrically separate, which is what lets a 5 V controller switch a 230 V load safely.
Question
What must be checked before connecting any output device?
Answer
The current. A chip pin supplies a few tens of milliamps — enough for an LED with a resistor and nothing else.
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Full study notes for Outputs in use
Topic 7.4 hub
Electronic systems applied
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