video

Videos

https://www.youtube.com/watch?v=NHY0B7WraAM

This is a very simple light that uses the series connection of a , a switch, a resistor and a 9 volt . It is very handy to use when there is no light. To make the brighter the number of can be added.

https://www.youtube.com/watch?v=5ih9Ae9gQqw

CREE XM-L T6 1- 3800LM 5 Modes Zoom Flashlight Light – Продолжительность: 2:25 Tinydeal DV+ 342 987 просмотров.

https://en.wikipedia.org/wiki/Led

Amazon.com: led torch rechargeable

Amazon.com: torch battery