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5.1.1 Explain the difference between a sinking output and a sourcing output - NSC Electrical Technology Digital - Question 5 - 2023 - Paper 1
Question 5
5.1.1 Explain the difference between a sinking output and a sourcing output. (Drawings are NOT allowed.) 5.1.2 Name ONE method, other than the LED display, of displ... show full transcript
Worked Solution & Example Answer:5.1.1 Explain the difference between a sinking output and a sourcing output - NSC Electrical Technology Digital - Question 5 - 2023 - Paper 1
Step 1
Explain the difference between a sinking output and a sourcing output.
Answer
A sinking output and a sourcing output are two types of connections in electronic circuits that manage the flow of current to devices such as LEDs.
In a sinking output, the transistor's collector is connected to the LED's cathode, effectively allowing the device to draw current from the source when activated. This means the current flows into the LED from the power source, making it illuminate when the output is enabled.
Conversely, a sourcing output has the transistor's emitter connected to the LED's anode, providing a current path from the LED to ground. In this case, when the output is activated, the current flows outward, which also causes the LED to light up. This difference can affect how peripherals are connected and controlled in a digital system.
Step 2
Name ONE method, other than the LED display, of displaying information in digital systems.
Answer
A Liquid Crystal Display (LCD) is another method used for displaying information in digital systems. LCDs are commonly used in devices such as calculators, watches, and digital panels to show text and images.