Show HN: I made open source, zero power PCB hackathon badges

{"problem_it_solves": "Provides hackathon attendees with programmable badges that display information without needing batteries", "target_customer": "Hackathon organizers, particularly for the Overglade hackathon in Singapore (HackClub event for high schoolers)", "use_cases": ["Hackathon attendee badges", "Event identification and networking", "Interactive NFC-enabled name tags", "Programmable information displays"], "pricing_details": "Bulk ordering recommended; hand soldering significantly cheaper than PCBA", "differentiator": "Zero-power operation using e-ink display, RP2040 microcontroller with 4MB flash, passive NFC capability, custom PCB art design", "traction": {"customers_mentioned": ["Overglade hackathon attendees (high schoolers in Singapore)"], "notable_metrics": "43 stars, 2 forks, 114 commits, 1 contributor"}}