Gate Lab

Logic design and practice

Draw a circuit

Add inputs and gates, then connect an output dot to a gate input or Q. Drag any block to move it.

Inputs

A · block 1
B · block 2

Simulator

Set the inputs, then play the signal through the circuit.

A

B

C

D

Gates

Circuit canvas

Click a dot to start a wire

Connect a gate or input to Q to complete the circuit.

Truth table

4 rows

The input combinations are supplied. Build the circuit, then generate a blank Q column to practice.

Truth table

4 combinations

A	B	Q
0	0	0
0	1	1
1	0	1
1	1	0

Select a row to inspect its signals in the circuit.

Gate diagram

Row 1 selected

1 · high 0 · low