DIY
HorizonSight 360° a Helmet-Integrated Rear-Awareness AR and Mission-Control Vision System
HorizonSight 360 gives a helmeted operator eyes in the back of their head, and gives their team eyes everywhere at once.
Engineering
DIY
Free Open Source Compact Car (FOSCC): Build a Street-Legal DIY Car From Salvage Parts for Under $10,000
Open-hardware plans for a street-legal DIY compact car: salvaged 4-cylinder powertrain on a builder-welded steel frame for under $10,000.
Engineering
Helical Piles and Screw Foundations: Capacity, Corrosion, and Cost
Helical piles, ground screws, and adjustable piers: load transfer, torque-to-capacity, corrosion, and cost against concrete.