Topic

vintage components

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

1. 

   1 The First Light Emitting Diodes

   Fran Blanche 3 people · 3 months · since Feb 2016

   FranLab look at the earliest LEDs, linked for its demonstrations of odd early packages and how dim the first devices were.

2. 

   2 Unusual usage (hours) counter with mercury capillary

   Applied Science 3 people · 3 months · since Dec 2015

   Ben Krasnow explains how a mercury coulometer hour meter works, linked whenever someone finds one of these unusual elapsed time indicators in old equipment.