Those who are a bit physically conscious will think that the light -sensitive semiconductor has the effect of automatic perception of light, and can use this feature to control the circuit. So where is the light control switch of solar street lights?

Question 2: If in the light rod or underground, how can I perceive the strength of the light to achieve the light control effect?

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

In response to these issues, many friends must have doubts, and for everyone to analyze the light control implementation of the controller we mainly adopted.

[Position]: There is no specifically similar semiconductor device, so the control switch in people's imagination does not exist

【Optical Control Parts】: Solar panels, batteries and controllers

[Principles]: As long as the light reaches a certain degree of darkness, solar street lights will automatically turn on running lighting. It is not subject to time limit and is only related to the strength of the light.

[How to judge]: Solar street lights are mainly implemented by the controller. The controller generally has a light control point (control point) voltage, most of which are 3V. When the sun is weak, the battery board voltage will continue to decline, from normal 17.5V or 35V to dark 0V. In the middle of the way, when the controller will get a dark signal after 3V, the controller will be delayed for a period of time (time can be set to prevent this voltage decrease in temporary reduction. For example, a sudden dark cloud during the day causes the sky to cause the sky to cause the sky Black, or the solar photovoltaic board is blocked by things), and after delay, it is still lower than 3V. At this time, the controller is judged that it is dark, and the connection of the battery and the street light head (light source lamp) will be connected. At this time, the street lights will constitute After a complete circuit, the light source was lit.