Category:DIY

Use a Wristwatch As a Compass

"Hold a watch with 12 o'clock at left. Move your arm so the hour hand points at the sun. The spot halfway between the hour hand and the 12 is south".^[1]

Misc

• 10 Surprising Uses For Aspirin
• Funditor
  • The Laser Listener - Espionage Technology for $3
  • DIY laser long-distance listening device

References

1. ↑ MAKE Magazine.