Led street lamp manufacturers to achieve road lighting control method

Question 1: Where is the light control switch? Some physical common sense will come to mind that photosensitive semiconductors have an automatic perception of the intensity of light, and this feature can be used to control the circuit. So where is the light control switch for solar streetlights produced by led street light manufacturers?

Question 2: If inside or below the light pole, how do you feel the intensity of light to achieve light control?

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

In response to these questions, many of my friends have doubts about how to implement the light control implementation of the controller we mainly use.

[Location]: There is no specific semiconductor device, so the imaginary control switch does not exist

[Light Control Components]: Solar Panel, Battery and Controller<>

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

[How to judge]: Solar street lights are mainly realized by controllers. The controller generally has a light control point (control point) voltage, most of which is 3V. When the sun is weak, the voltage of the panel will continue to drop, from the normal 17.5V or 35V to the dark 0V. In the middle of the process, when it is lower than 3V, the controller will get a dark signal, which 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 caused by the daytime Black, or the solar photovoltaic panel is blocked by things), after the delay, it is still lower than 3V. At this time, the controller judges that it is dark, and it will connect the battery and the lamp head (light source lamp). At this time, the street lamp will constitute With a complete loop, the light source is illuminated.

Conversely, the process from dark to day is like this: before dawn, the circuit of the battery and the luminaire is connected, the luminaire is illuminated, the photovoltaic panel is disconnected from the battery, and there is no closure. Loop. As the day slowly brightens and the illuminance becomes stronger, the voltage perceived by the photovoltaic panel also increases slowly. When the photo-controlled voltage value exceeds 3V, the controller will have a delay time to judge. When the delay time exceeds the delay time, the photovoltaic panel voltage Still greater than or equal to the photo control voltage of 3V. Langxu Lighting-led street light manufacturer