Study on project matters traffic light from the solar cell, the objective is to reduce school electricity 1. 2. the study of the solar panel 120W dimensions from a solar cell sizes leading experiment 120W put face to the Sun and the solar power from the cell into the charts in features to control the rate of charging the battery down, the fire shot and shut-off when the battery is full. When the battery is full, this can be taken per match with inverter for DC current (DC) power switch (AC) to be used with traffic light labels. The study found that the temperature is between 24-32° c, the Xian takes the charts by approximately 1 hour 30 minutes or 2 hours and on days with high temperatures of 35-40 degrees take about 30 minutes down the battery size 12V 12Am battery size from 12V 12Am when used with electric 30W through the inverter or power converter, so it lasts approx. 6-7 hours.
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