Open-source boards designed in KiCad by captainchapster on GitHub, from 4 repositories. A board’s address here is its repository’s there.
captainchapster/Entropy32-Plus
A dedicated Bitcoin seed phrase generator that uses radioactive decay as an entropy source. Completely open source and designed to be simple, auditable, and built by anyone with readily available components.
captainchapster/Entropy32
A dedicated Bitcoin seed phrase generator that uses radioactive decay as an entropy source. Completely open source and designed to be simple, auditable, and built by anyone with readily available components.
captainchapster/Eigentime32
A self-contained pocket watch that keeps its own time for a decade. No GPS, one coin cell, one PCB.
captainchapster/Entropy32-Recorder
A standalone entropy recording instrument that streams Geiger pulse time stamp data over USB serial for the purpose of collecting data for NIST testing.