DIY membrane nitrogen generator for home brewing nitro cold brew and beer. 50L/h output at 99.5%+ purity, 100 PSI, ~2,200ドル build. Includes KiCad PCB, STM32 firmware, SolidWorks CAD, and full P&ID. Open source hardware alternative to 4,500ドル+ commercial units.
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Updated
May 2, 2026 - C