LED Night Light

Night lights are often used at home for nighttime lighting. Since nighttime lighting lasts for a long time, it is required to be very energy-saving. The so-called "zero-watt" bulb consumes about 5W of power under normal circumstances, but the night light circuit introduced here only consumes 30mW. The lighting power supply is directly powered by a 220V AC power supply, and a capacitor is used to limit the current. The D1~D5 diode branch next to the white LED1 is used to protect the surge voltage generated during the opening and closing period; D6 blocks the reverse voltage generated when C1 discharges; R2 is the discharge resistor of C1; R1 is to prevent excessive current by burning itself in the event of a short circuit in C1.