Question 1: Where is the light control switch? Anyone with a bit of physical common sense will think that photosensitive semiconductors have an automatic sensing effect on the intensity of light, and this feature can be used to control circuits. So where is the light control switch of the solar street light produced by the led street light manufacturer?

Question 2: If it is inside the light pole or underground, how to perceive the intensity of the light to achieve the light control effect?

Question 3: If it is outside, is it under the solar panel?

In response to these problems, many friends must have doubts, let's analyze the light control implementation method of the controller we mainly use.

[Location]: There is no similar semiconductor device, so the control switch that people imagine does not exist

[Light control components]: solar panels, batteries and controllers

[Principle]: As long as the light reaches a certain degree of darkness, the solar street light will automatically turn on the running lighting, not limited by time, but only related to the intensity of the light.

【How to judge】: The solar street light is mainly realized by the controller. The controller generally has a light control point (control point) voltage, most of which are 3V. When the sunlight is weak, the battery panel voltage will continue to drop, from the normal 17.5V or 35V to 0V in the dark. In the middle of the process, when it is lower than 3V, the controller will get the signal of darkness, and it will be delayed for a period of time (the time can be set, in order to prevent this voltage drop from being temporarily reduced, such as a sudden dark cloud during the day, causing the sky dark, or the solar photovoltaic panel is blocked by something), after the delay, it is still lower than 3V. At this time, the controller judges that it is dark, and will connect the battery and the street lamp head (light source lamp). At this time, the street lamp is composed of After a complete circuit is completed, the light source is lit.