Topic

fresnel lens

2 videos. Ranked by independent recommendations, not by views.

1. 

   1 Building a realistic artificial sun (for dark winter days)

   DIY Perks 4 people · 4 months · since Jun 2021

   DIY Perks builds a lamp that convincingly imitates distant sunlight, admired as an ambitious project for anyone wanting realistic indoor daylight.

2. 

   2 How to get 2000ºF Solar Power

   TKOR 3 people · 3 months · since Feb 2014

   A clip on using the huge Fresnel lens from an old big-screen TV to focus sunlight to extreme heat, shared as a fun salvage idea rather than electronics.