Show HN: We built the smallest dual-band aircraft tracker
Summary
The article introduces ADSBee 1421, a tiny dual-band ADS-B receiver module built for low power embedded use. It explains background on ADSBee 1090U and LR2021, lists supported output protocols, NDAA compliant variant, and availability including a developer kit and pricing. The post also notes open source firmware and design files for easy integration into custom PCBs.