Kristjan SalevJan 11, 20226 minHOW HORIZONTAL AND EQUATORIAL SUNDIALS WORKIn this post, we take a look at an ancient gadget that helped us read the time when mechanical clocks hadn't been invented yet. Since I'm...
Kristjan SalevDec 12, 20215 minLED BULB LUMENS, LUX, KELVINS, AND WATTS EXPLAINEDToday LED bulbs are very common all over the world, more than 50 % of the world's light sources are now LEDs. The main reason is that...
Kristjan SalevNov 20, 20215 minMEASURING NOISE WITH AN DECIBEL METERA decibel meter, or sound level meter, is an electronic gadget that measures the level of sound or noise. In a previous post, we looked...