Related problems of solar lawn lamps

1. Photosensitive sensor

 

When designing solar lawn lamps, photoresistors are usually used to realize automatic switching. However, solar cells have better characteristics than photoresistors as photosensitive sensors. When using a solar lawn light with only a 1.2V Ni-Cd cell, if the solar module consists of four pieces in series, the voltage is low, and even lower in low light, which may result in the failure of the light control switch. In this case, the problem can be solved by increasing the transistor direct-coupled amplification.

 

2. Battery voltage control

 

solar lawn lamps need to maintain high requirements for continuous cloudy and rainy days, therefore, reduce the LED load or shorten the daily light-emitting time to reduce costs. Through this method, the system cost and performance can be balanced. 3.

 

3. Solar cell encapsulation

 

solar cell encapsulation in the form of lamination and drip adhesive two. The lamination process can ensure that the solar cell life of up to 25 years or more, drip glue, although beautiful, but shorter life. Therefore, according to the needs of the service life, choose the form of encapsulation.

 

4. Blinking light

 

the use of gradual brightening and dimming can not only enhance the solar lawn lamp irradiation effect, but also adjust the blinking duty cycle to control the average output current of the battery, extend the system operating time or reduce the power of the solar cell under the same conditions, significantly reducing costs.

 

5. switching speed of three-color base color energy efficient lamps

 

the high current of three-color base color energy efficient lamps when starting has a big impact on the system, which may lead to solar lawn lamps not being able to start or starting repeatedly, affecting the service life.

 

6. Boosting circuit and LED lamp impact

 

Small power solar lawn lamps are usually equipped with boosting circuit. When using an oscillating circuit for inductive boosting, if a standard color-coded inductor is used, its efficiency is low. Inductive boosting using a closed magnetic circuit can significantly improve the efficiency of the boost circuit. LED characteristics close to the voltage regulator diode, the operating voltage changes, the operating current may vary significantly. Automatic current limiting should be used to ensure the safety of the LED to avoid damage.

 

7. Adjusting solar lawn lamp street lighting

 

solar lighting fixtures detect street light through light-sensitive probes (such as photoresistors, diodes or triodes). By adjusting the proper sensitivity, you can ensure that the solar street light works properly.