All items tagged with light and Solar Energy (10)

| Hydrogen will increase in importance in the future, in order to reduce our dependence on fossil fuels. Hydrogen can be sustainably generated...

| This circuit exploits the unique ability of the LTC3129 and LTC3129-1 to start up and operate from an input power source as “weak” as 7.5 µW...

| High brightness LEDs and special optics allow street lamps to be spaced up to 50 meters apart -- much wider than is possible with other solu...

| This night light has two power sources: a solar cell with a peak output voltage of about 6 V, and a Li-Ion cell with a voltage between 3.7 V...

| I'm leaving on a little camping trip to France tomorrow so this one seems appropriate: A transforming flashlight that splits open and turns...

| Forget the Boieng Phantom Eye, the Zephyr takes unmanned solar aviation to the next level. The Zephyr is a super-lightweight, carbon-fiber c...

| This project is intended for use in conjunction with existing or still-to-be-built garden lighting systems. The circuit cannot operate alone...

| Solar powered lights are nowadays available at incredibly cheap prices, so we won't advise you to build these yourselves. But you may b...

| Completely ‘self-supporting’ garden lamps using solar cells as their energy source are gradually becoming more and more common. How do they...

| When a battery is charged by a solar panel during the day, it may discharge via that panel after sunset. This may, of course, be prevente...