It offers the advantages of low power dissipation low minimum operating voltage and automatic dusk to dawn switching.
Led solar lawn lamp driver ic.
Ana608 is the core component of all solar garden lights.
It boosts 0 8 2v to drive white leds or other colors with 85 90 efficency.
To run a led from single 1 5 v 1 2v or in particular largely depleted batteries the famous joule thief circuit using a coiled toroid is great.
You can make your own solar light or single battery led booster driver.
Ic cl0116 lamp controller is an application specific integrated circuit asic in which solar charging and led driving sections are integrated on the chip.
However when salvaging the solar cell and battery from a cheap solar garden light to make a charging circuit i realised the electronics are in fact a simple led driver.
The yx8018 comes in a 4 pin transistor style to 94 package and the pin.
A solar garden light circuit.
This outdoor led solar garden lights project is a hobby circuit of an automatic garden light using a ldr and 6v 5w solar panel.
It requires only an external inductor to construct a boost power supply with over 90 per cent efficiency.
Inside the example i deconstructed was a single 1 25 volt 100 mah aaa nicd cell and a small pcb with the led a 220 uh inductor and a four pin voltage boosting integrated circuit marked yx8018.
When the daytime sunlight is irradiated on the solar cell the light energy is converted into electric energy and stored in the battery and then the battery is provided for the led light emitting diode of the lawn lamp at night.
Add the battery and the solar cell and you have a solar light.
The complete circuit is shown in figure 2.
Solar garden light circuit.
While the last circuit works well for driving a yellow or red led it runs at 2 4 v the output of the nimh battery it does not have sufficient voltage to drive a blue or white output led.
During day time the internal rechargeable 6 volt sla battery receives charging current from the connected solar panel through polariy protection diode d9 and current limiting resistor r10.
Using the solar light ic all you need is the solar ic an inductor and the ultra bright led to make the circuit.
