The concept of building your own hydroelectric generator seems simple at face value: use gravity to impart as much force as possible onto a turbine, which spins a generator, thus generating ...

Discover how to build a portable DIY solar charger for your smartphone using simple materials like copper foil tape, a ...

The Evotrex-PG5 combines genuinely innovative features with a lower price point than competitors, but it's still a luxury buy ...