Hacked Gadgets Forum

December 10, 2006

Solar Powered Camping Light

at 6:30 am. Filed under DIY Hacks, Electronic Hacks

This looks like an interesting solar camping light project.

“The unit contains a solar controller board from the Electronics Goldmine that turns the light on at dusk and off at dawn. The batteries are two lithium 3.6 v cells in series, providing 7.2 v @ 1.1 amp hours. The two white LEDs are in series and draw 20ma. The only other parts used are a switch and power connector for the solar panel connection. I would have preferred a white box for the project since it is in the sun for charging.

The board contains a 358 dual op amp. One op amp is used to turn the light on at dusk and off at dawn and the second is used to turn off the light when the battery drops to about 5.5 volts. The CDS cell pokes through a hole drilled in the box. There are various ways to mount the LEDs. Not having any mounting hardware at the time, I mounted them to a circuit board which I bolted to the box.”