DESCRIPTION: This is a LED/Battery charger and battery, no housing is provided at this time, but it planned to be made out of acrylic. This device will make a wireless pathway marker light, it is intended to use multiple devices to light a pathway from my backdoor, through the woods and to my fishing spot, so I can fish at night and not require a flash light. It can also be use for a driveway marker light in the winter time, so when I plow my driveway of snow, I will be able to locate the drive from the ditch/yard. These lights are intended to be mounted on 3-6 foot tall poles. Carclo or Ledil optics will be used to create a beam spread that is favorable. The battery is charged via a solar cell.

TECHNICAL DETAILS: The components are off the shelf and are available from Digikey or Mouser. The battery is a rechargable coin type, CR2032, you can use a non-rechagable CR2032 if you like, and disable the charging circuit, the non-rechargable battery only cost 20 cents. The fully charged battery should last approximately 10-15 hours with a current draw of 6 mA. The battery should fully charge from dead within 2 hours in an overcast sky, daylight.The battery is rated at 85 mAhr and should fully charge to 3.7-4.0 volts with the selected solar cell.

LEARN / TOPIC / BUILD INSTRUCTIONS: Populate the board and it should work as stated above. The LED current is not regulated due to the lack of overhead voltage in the design with a single battery, using two batteries, a linear current regulator could be used, such as the ON 5809 IC. The design has not been debugged or built yet, I am in the process of doing that.