TechWiredabout 2 hours ago
Squeeze More Juice Out of a Dead Battery!
1 min read
A joule thief circuit uses a transformer and transistor to boost a 1.5-volt AA battery's voltage, lighting a 3-volt LED. The oscillating current taps residual chemical energy, keeping lights on for days. Boost converters in flashlights and solar systems use the same principle.
Level
Hype check
Tap to vote and see what everyone thinks.
Summary by ByteBrief
