This Emergency Solar Street Light Circuit automatically controls lighting using a solar panel and battery, where during the day the 5V solar panel charges the 3.7V battery through the IN5399 diode and keeps the 2N2222 transistor OFF so the LED remains OFF, while at night when solar power is not available the battery supplies power, the transistor turns ON, and with the help of resistors (1K, 10K, 5–10Ω) the LED light automatically turns ON, making the system work efficiently without any manual switch.
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#solar #solarlight #streetlight #electronics #diy
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