How-to guides
This page collects the step-by-step guides for building, programming and coding the FV-1 Sandbox.
If you are starting from nothing, work through them in this order.
Getting the hardware running
- Building the FV-1 Sandbox pedal — where to find the PCB, schematic and firmware files.
- Installing the RP2040 programmer firmware — turn a bare RP2040 board into a Sandbox programmer.
- Programming an EEPROM with HEX files — drag a HEX file onto a drive and your pedal reloads.
Writing code
- Using the Sandbox FV-1 Editor — the browser-based code editor and assembler.
- Writing your first FV-1 program — from pass-through to a working tremolo.
- Using the FV-1 simulator — hear an algorithm before you program hardware.
- Controlling the simulator with MIDI — drive the pots and the effect switch from a hardware controller.
- Using the simulator indicator lamps — watch REG30 and REG31 while a program runs.
- Labelling pots and lamps in your source — comment tags that name the simulator's controls.