Michael d’Estries is a co-founder of the green celebrity blog Ecorazzi. He has been writing about culture, science, and sustainability since 2005. His work has appeared on Business Insider, and CNN.

What if you could replace a $20,000 military-grade router with a DIY system costing just $106.23? It sounds improbable, but thanks to open source ingenuity and affordable hardware, it’s entirely ...