Breadboard Build Challenges

Read the spec, build it in the breadboard simulator, and the system auto-grades by electrical equivalence — proof you understand the breadboard.

① One resistor across the supply

DC supply (5 V) + one 1 kΩ resistor connected directly between + and −, forming the simplest closed loop.

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② Two resistors in series

Two 1 kΩ resistors in series across 5 V: + → R1 → middle node → R2 → −. R1 and R2 must share the middle node (same column).

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③ Current-limit resistor + LED

5 V → 330 Ω resistor → LED → back to −. The LED is polarised: resistor to the LED anode (A), cathode (K) back to −.

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