Circuit Simulator
Any logic circuit, wired from gates and run live.
Drop switches, gates, LEDs and seven-segment displays on a canvas, wire them, and watch every signal as you flip the inputs. Type an expression and it builds the gates for you, or start from an example: an adder, a decoder, a multiplexer, a comparator. Then make the circuit’s truth table, and walk away with a materials list and a breadboard plan — before you’ve touched a single jumper wire.
Free to use, with no limits. Create an account to save your work.
Wire it, check it, then build it.
Wire it
Switches, gates and outputs on the canvas — by hand, from an expression, or from an example. Signals carrying a 1 light up as you go.
Check it
Step the inputs through every combination and read the truth table of every output, with the expression each one works out to.
Get the materials list
The parts your verified design needs, counted for you, so the trip to the stockroom happens once.
Follow the breadboard plan
Where each chip sits and how the wires run, laid out before you build.
Know the parts and the layout first.
For the 2-to-4 example above, this is the kind of plan you take to the lab bench. Your own lab sheet sets the final part list.