Crappy lead-acid LED lamp with brilliantly simple circuitry.
11:22
Unusual circuitry twist - emergency light module
14:25
Poundland "disposable" phone charger.
7:11
Amazing idea and tip in 7 minutes! No craftsman can do without this tool
22:59
12V LED filament lamp video disaster.
18:37
Inside an American emergency light (with schematic).
10:22
X-ray of new curved LED filament bulb
26:58
Simplest solar light possible, using old phone battery.
16:45