Use the arrow keys to change what you are holding. Click on a grid space to place that item. if you click on a button, NOT gate, or AND gate while holding that item, it will activate that item.
All programming was by me. If you liked, please like and favorite! You can use this to simulate many logic gates, such as: OR, AND, XOR, NAND, NOR. I have also used it to simulate a half adder