GuitarPCB is a U.S.-based supplier of printed circuit boards, parts, and kits for DIY guitar effects pedal builders. Founded and run by Barry Steindel, the company designs and sells PCBs for a wide range of classic and original pedal circuits — including overdrives, fuzzes, modulation, and delay — along with mod boards intended to expand or tweak existing builds. Its NostalgiTone line packages multiple effects onto single PCBs as Singles, Dual Combos, and Triple Combos aimed at builders who want more than one circuit in a single enclosure.

The company ships from the United States and works with authorized distributors in Europe and Australia, with resellers such as Pedal Parts and Kits and Musikding stocking its boards in kit form. Beyond hardware, GuitarPCB maintains an active forum and documentation hub where builders share schematics, troubleshooting help, and completed builds, which has helped position the brand as a long-running reference point within the hobbyist pedal-building community rather than a producer of finished, branded stompboxes.

GuitarPCB has 2 products cataloged on Equipboard, including Fuzz Effects Pedals and Overdrive Effects Pedals.