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Build a Better DIY Seismometer

Cars That Think

My initial solution was to attach to the boom an aluminum vane immersed in a viscous liquid (namely, oil). That worked, but I could just see the messy oil spills coming. earthquake struck just off the coast of Cuba. Without that, the pendulum, once excited, would oscillate for too long.

DIY 139
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Cuba’s Power Grid Nears Total Failure

Cars That Think

Cuba isn’t just in an energy crisis; the country’s grid sits on the verge of systemic failure. The National Electric System, most of which was built after 1959, hasn’t received the investment and maintenance it needs for 35 years—a consequence of Cuba’s complex political and economic history.