HDLbits
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Getting Started/First Steps

First Steps

Your very first circuits and how the judge works.

  1. 1

    A Single Wire

    Wire a single input directly to a single output — the smallest possible circuit.

    easy
  2. 2

    Four Independent Wires

    Wire four independent inputs to four independent outputs with no interaction between them.

    easy
  3. 3

    Inverter (NOT Gate)

    Build a NOT gate: the output is the logical inverse of the input.

    easy
  4. 4

    2-Input AND Gate

    Build a 2-input AND gate whose output is 1 only when both inputs are 1.

    easy