Difference between revisions of "SmartLights"
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== Motion activated lighting with solar charged battery power == | == Motion activated lighting with solar charged battery power == | ||
| + | Here's the problem space. A relatively high powered LED light (four feet of 60/meter LEDs) that consumes about 17 watts is being powered by a 7Ah sealed lead acid battery and the available power for recharging the battery is from a 2 1/2 watt solar panel. Figuring roughly 10 watt hours out of the panel on a given day, there is only enough power to run the LEDs for 35 minutes every 24 hours. So if the LED lights aren't very very smart they'll be useless. | ||
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== Initial charger circuit testing (Silvertel ag103 MPPT charger is small board near corner of yellow meter == | == Initial charger circuit testing (Silvertel ag103 MPPT charger is small board near corner of yellow meter == | ||
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Revision as of 16:49, 14 April 2017
Motion activated lighting with solar charged battery power
Here's the problem space. A relatively high powered LED light (four feet of 60/meter LEDs) that consumes about 17 watts is being powered by a 7Ah sealed lead acid battery and the available power for recharging the battery is from a 2 1/2 watt solar panel. Figuring roughly 10 watt hours out of the panel on a given day, there is only enough power to run the LEDs for 35 minutes every 24 hours. So if the LED lights aren't very very smart they'll be useless.
Initial charger circuit testing (Silvertel ag103 MPPT charger is small board near corner of yellow meter
Thermal image of charger board passing a couple watts to load and battery while battery supplies an eight watt load. About 20F rise over ambient temperature.
DRAFT (UNTESTED!) Schematic of management circuit
DRAFT (INCOMPLETE, UNTESTED) Initial PCB layout
