Trinniti is a small, independent maker based in Park City, Utah that produces hand-made accessories for modular synthesizers. The brand is best known for its LED plug lights, which are designed to visualize signal activity on a patch cable: positive voltage illuminates red, negative voltage illuminates blue, and audio-rate signals appear purple, with brightness scaling to voltage level. The lights feature a rubber grip with the Trinniti logo and plug directly into a module, multiple, or stackcable.

Trinniti's product line covers both of the common modular voltage standards. The Eurorack version uses a 3.5mm (1/8") mono plug and is built for the ±12V Eurorack spec, while a larger 1/4" version is made for the ±15V MU-format systems used by Moog Modular, Synthesizers.com, MOTM, and Modcan. Products are typically sold in multi-packs through third-party retailers such as Amazon, eBay, and specialty synth shops rather than through a dedicated storefront.

The brand occupies a niche corner of the modular community, where its plug lights are used as both a functional signal-visualization tool and a cosmetic enhancement for patched systems. Discussion of Trinniti products appears on modular forums including Mod Wiggler, where they are noted for their utility in debugging patches and for making CV and audio activity visible at a glance.

Trinniti has 1 product cataloged on Equipboard, including LED Lighting.