Learn how to build a simple solar cell at home using copper tape, plastic cups, and water. This step-by-step science ...

Discover how to build a simple solar cell at home using everyday materials! This step-by-step tutorial demonstrates how to repurpose an aluminum can, a CD, copper wire, toothpaste, lemon juice, and a ...

Here is the simple solution to make an automatic solar powered led lamp. It automatically switches on two high power White LEDs in the evening and stays on for 6 hours using a 6 volt 4.5 Ah ...

This close-up through the polycarbonate shows the absorber screen, the foam sealer molding, screws with EPDM washers, battens and a bottom vent. After walking into my workshop one December morning and ...

Dear Jim: We have teenage daughters who take long showers. Our water heating costs are sky-high. We are on a tight budget, but want to use some solar water heating. Is there a system we can make ...