Retrospector

Maker	Mountjoy Modular
Type	Stereo digital delay with up to five minutes of delay and a filtered feedback path
Mounting	SMD
Width	12 HP
License	Proprietary (No hardware licence published)
Difficulty	🌋 Fine-pitch SMD

STM32H743 at 400MHz with 32MB of external SDRAM holding the delay line. Feedback can exceed 100 percent, and the filter sweeps from low pass through to high pass. Three RGB LEDs show delay times and filter state.

Documentation

• Bill of materials (BOM)
• Fabrication files (PCBA-ready)

Links

• Source / files on GitHub
• Maker page

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This is a third-party open-source design, listed here as a build reference. Specs are researched from public sources; check the source repo and store for the current BOM, panel, and revision before ordering parts. Corrections welcome.

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