The 3.5 mm headphone jack has been in decline for many years, but if your phone still has one, you can use it for a lot more than just listening to music.

Learn how to create a simple DIY electrical generator using a few easy-to-find materials. This step-by-step video guides you ...

Learn how to make a simple hand-cranked power generator from scratch using basic materials like DC motors, a wooden base, an ...