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Anonymous users2024-01-24This topic is a bit general. However, I guess this automatic should be an LED night light that automatically controls the switch according to the ambient brightness.
You can think about it this way: the night light generally requires a small power, 2 5 5mm LEDs can be used, and the voltage can be used for DC-DC boost with lithium battery or battery).
Brightness switch control can be used to control the circuit on and off with a photodiode or a small solar panel. There are many such circuits on the Internet.
If the power supply adopts automatic solar charging, a charging control circuit can be added to protect the battery from overcharging or overdischarging.
There are many related circuits on the Internet, you can search for them yourself.
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Anonymous users2024-01-23KERRY616's answer is also very comprehensive, the night light is generally made to plug directly into the wall socket, that is, it will automatically glow at night when the indoor light is not enough, I want to add the power supply part.
The power supply is best to use AC 220V power supply, and use resistance or capacitor step-down inside the night light (if the power of the external optical element is small, the resistor can be directly used to step down, but it should be noted that a rectifier diode should be connected in series when the voltage is lowered with a high-power resistor, which is used to prevent the light-emitting diode from breaking down when the negative half cycle, if the power of the light-emitting element is large, the capacitor can be connected to the step-down when the resistance step-down cannot meet the conditions, and the capacitor capacity is calculated as follows: first use 220V-load voltage = capacitor terminal voltage.
First, calculate the load operating current I
Capacitive reactance XC = U I
THE SAME AMOUNT XC=1 2* WHERE F IS THE FREQUENCY (HZ) C IS THE CAPACITANCE VALUE (FARAD), AND C IS CALCULATED ACCORDING TO THE EQUATION
These two methods are the simplest and most economical ways to lower blood pressure. And the volume can be made small.
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Anonymous users2024-01-22Since you ask for ideas, at least you have to provide the performance parameters and functions of this lamp, right?
At least need to know.
1.Input and output parameters.
2.How is it automatic? Sound? Brightness and so on...
Not many people are going to spend thirty dollars and probably find someone to write.
It's very small, with only one or two small LEDs, right? Only, it is far less than one kilowatt-hour of electricity for a whole year.
The process of making an LED night light out of wood and resin is simple and the process is explained in detail.
The night light has no electromagnetic radiation, because its power is extremely low, and it is also light radiation, and it is luminous and has light radiation, not too strong light radiation, and it is not harmful to people.
Are you going to wholesale it? Or do you want to sell it? If you want to wholesale, I can introduce you to people.