Led Night Light Factory: Multi-Function Led Night Light Principle
220V AC power passes through the AB end of the power switch S1-1, enters the electronic bucker and drops to 10V~12V low-voltage AC. The rectification and filtering circuit composed of VD1~VD4 and C1 is converted into smooth DC power, and then regulated to 7V through LM317. The AB end of the power switch S1-2 enters the brightness adjustment switch S2 and is used by the high-intensity light-emitting tubes LED1 to LDE8. The electronic pressure reducer can be purchased in the market. It should be small. In order to make the power switch S1 function as an AC/DC transfer switch, two sets of three-position small toggle switches or rocker switches should be used. S1-1 When the AB end is connected, it is powered by AC. When the BC end of S1-2 is connected, it is DC power supply for the internal battery. When the dial of S1 is turned to B, the circuit is disconnected and the night light is extinguished. In order to operate the LED within the normal range of 3.5V, the VD10 connected to the positive terminal of the battery reduces the voltage of 7.5V to 6.9V.
There are three diodes IN4001 connected in series between the four gears of the brightness adjustment switch S2. The brightness of LED1~LED8 is adjusted by the tube pressure drop. The adjustment effect is very good. LED1~LED8 select φ5mm high brightness white light emitting diode, every 2 strings The group is divided into 4 groups. 2 is a printed circuit board of the rectification and filtering regulator circuit of FIG. 1.
The multi-function night light is placed on the bedside under normal conditions, energy-saving and beautiful. In the event of a power outage at night or when going out to work, bring a night light and open the white cover. We will see 8 LED tubes like pearls in the shell. Brilliant, the night light becomes a flashlight, a work light, and a reading light that can move, to help you work, with high brightness, wide illumination and any flashlight. Can not be compared. If the whole night light or the upper cover is made of transparent colored plastic, it will be more attractive under the transmission of the light-emitting diode.
Ninghai Haohua Company is an LED Night Light Factory . The LED night light products are complete in specifications and exquisite in style. The goods are exported to Europe, the United States, Australia and other countries and regions.
https://www.nhhx.net/
