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With reference to the IC circuit shown below: (i) Name the input and output components in the circuit - Leaving Cert Engineering - Question c - 2013
Question c
With reference to the IC circuit shown below: (i) Name the input and output components in the circuit. (ii) Name and describe the functions of component A in this ... show full transcript
Worked Solution & Example Answer:With reference to the IC circuit shown below: (i) Name the input and output components in the circuit - Leaving Cert Engineering - Question c - 2013
Step 1
Name the input and output components in the circuit.
Answer
The input components in the circuit are:
- 12V power supply - provides necessary voltage for the circuit.
- Thermistor - a temperature-dependent resistor used for sensing purposes.
- Potential divider - helps to scale down the voltage for the input to the IC.
The output components in the circuit are:
- Relay - acts as a switch that allows control of a higher voltage circuit.
- Motor - the output device that is actuated by the relay based on the circuit's operation.
Step 2
Name and describe the functions of component A in this circuit.
Answer
Component A in the circuit is the relay.
Function of the Relay:
The relay functions as a switch that is activated when the transistor in the circuit is turned on. This allows the 120V circuit to be controlled and activated by the lower voltage 12V sensing circuit. Essentially, the relay isolates the low voltage control side from the high voltage load side, providing safety and control over the motor's operations.