Horrific LED tester that can literally kill you - (with scary schematic)
14:42
Light with a novel ceiling attachment system - with schematic
23:35
High voltage LED tester with VERY clever circuitry (and hidden features)
26:55
Uma coleção de dicas e truques simples que podem poupar milhões de dólares todos os anos
20:50
São os volts ou os ampères que matam?
17:00
Dead batteries - with odd charging circuitry
13:06
HUGE Magnet VS Copper Sphere - Defying Gravity- Will a Neodymium Magnet Float Inside?
11:45
Four Steps to Flawless Wire Joints (How to Solder)
27:33