circuitFX is an After Effects tool for creating graphical circuit boards. The circuit pattern is generated randomly with each button press, and beyond the circuit lines and circles it also produces chips, resistors, and capacitors. You can place all the parts in a single shape layer or split each part of the board into its own separate shape layer.
A "Using Masks" mode lets you shape circuits within drawn areas. You set the Grid X and Grid Y values to control the density of the grid, create a grid guide, draw one or more masks on that layer, and then generate the circuit from those masks. The tool is aimed at technology or sci-fi projects, animated backgrounds, HUDs, and similar work.
Version 1.91 arrived in October 2024. Recent updates made circuit generation much faster and more intuitive, added a static seed so you can repeat the exact same circuit when other values stay unchanged, and fixed an issue that had prevented generation in the "Using Masks" mode. A demo video is available.