Solar Lawn Light is a green energy lamps, with safety, energy saving, environmental protection, easy installation and so on. Solar lawn light mainly by the light source, the controller, the battery, the solar cell module and the lamp body and so on the composition. Which in the light irradiation, through the solar cells to store electricity in the battery, in the absence of light, through the controller to the battery power into the load LED. Suitable for residential community green grass landscaping lighting embellishment, park lawn beautification embellishment.
Solar lawn lamp is China's solar photovoltaic applications in the field of annual consumption of solar cells the most projects, is the world's only use of special integrated circuit control of solar cell applications, is entirely by the semiconductor material to provide electricity, and at the same time with semiconductor materials, the real Semiconductor lighting products. Is expected to follow the global economic recovery, the total international market demand will increase, while the domestic market demand will gradually appear, villas, parks, golf courses and other places may be the market demand for the most places.
Photovoltaic cells for the photosensitive device solar lawn lamp circuit. The so-called photosensitive device for the photosensitive device refers to the use of solar cells, the optical characteristics of its own, that is, light solar cell output voltage, the output shows a high level; when no light, the solar cell no voltage output, the output appears low The
The circuit is mainly composed of battery charging circuit, switching circuit, driving circuit. The charging circuit is composed of transistor Q1 and resistor R2, and the driving circuit is composed of transistor Q2. The driving circuit is composed of transistor Q1 and diode R2.
Circuit working principle
When there is light exposure, it is equivalent to switch S1 closed, connecting 6 points. At this time the transistor Q1 base high potential, Q1 transistor conduction (collector and emitter conduction), Q1 transistor in the saturation zone, through the R2 resistor current will all through the Q1 transistor collector to the emitter ground, and the flow Q2 transistor base current is almost zero, so Q2 transistor cut-off, that is, Q2's collector and emitter no current, load LED1 no current, stop working.
At the same time, the power generated by the solar cell is charged to the battery V2 through a D1 diode, and the other is connected to the Q1 emitter through the R2 resistor, the Q1 collector and the Q1 emitter. Since the battery resistance is much smaller than the R2 resistance, the power generated by the solar cell flows almost to the battery V2.
When no light is irradiated, the switch S1 is turned off. At this time the base of the transistor Q1 base low point, Q1 transistor cut-off (collector and emitter cut-off), Q1 transistor in the cut-off area, through the R2 resistor current will all through the Q2 transistor base to the emitter ground, so Q1 transistor In the amplification zone, that is, Q1's base current and collector current into a β-fold relationship, load LED1 normal work.
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