I decided to do this project because I wanted a small but vary bright flashlight, so that I could use to use up all the old smoke detector 9V batterys. I change them every New year so I have a good supply of half dead batterys. This is what I came up with 3 white LEDs a chunk of pc board and a top to a 9V battery and some hot glue and some solder.





The 8 Biggest Shifts in the Next 10 Years – Epi-3696
-
In this episode, I walk you through eight of the biggest economic and
technological shifts that are already in motion and will reshape everything
by 2035. ...
7 hours ago