High voltage LED tester with VERY clever circuitry (and hidden features)
14:17
Inside a cheap burner WiFi router/repeater
15:48
Horrific LED tester that can literally kill you - (with scary schematic)
32:51
Thermoelectric cooling: it's not great.
29:57
Mãos ociosas e um Tormek!
25:07
🔥Самый дешёвый LED Тестер на 300V с Aliexpress🔥HWL300🔥
22:03
PK-A22F high voltage module teardown with schematic
19:48
Why Are Cooling Towers Shaped Like That?
22:59