Aion FX is a DIY guitar effects company based in Des Moines, Iowa, founded by Kevin VandeKrol. The business grew out of Kevin's pedal-modification and repair work in the late 2000s and transitioned into selling printed circuit boards in 2013, eventually expanding into complete pedal kits. The company designs PCBs and kits inspired by classic effects circuits, covering fuzz, overdrive, distortion, delay, modulation, and ambient effects.

The catalog spans hundreds of circuits and dozens of complete kits, with releases such as the Vector ambient delay and a range of Fuzz Face-inspired fuzz builds among the better-known offerings. Kits are assembled with parts from brands like WIMA, Taiway, and Vimex, and ship with detailed illustrated build documentation aimed at first-time solderers as well as experienced hobbyists.

In addition to retail kits and bare PCBs, Aion FX offers PCB white-labeling and custom design services for builders and small pedal companies, and maintains a resource library of articles on pedal electronics. The brand has developed a reputation in the DIY pedal community for the clarity of its documentation and the breadth of its circuit library.

Aion FX has 40 products cataloged on Equipboard, including Overdrive Effects Pedals, Fuzz Effects Pedals, and Compressor Effects Pedals. Their gear is featured by 1 artist, with the strongest followings in Rock and Pop. Notable users include Wayne Sermon.