I also design and make effects pedals for guitars and other instruments -- often out of Lego bricks. You can follow my work at https://www.instagram.com/circuitous.fx .

Work-in-progress of the FZ-BRK, probably one of my favorite circuits. You can buy it at https://reverb.com/item/81865530-circuitous-fx-fz-brk-2024-lego-light-blue-mixed-colors !