4 ms·
Instructables guide to building one: https://www.instructables.com/Pocket-Size-Spinthariscope/ https://www.instructables.com/Pocket-Size-Spinthariscope/
by mmettler 5y ago
Instructables guide to building one:
https://www.instructables.com/Pocket-Size-Spinthariscope/ https://www.instructables.com/Pocket-Size-Spinthariscope/