The use of LEDs as lighting devices is one of the promising directions in lighting. The good quality of the light itself, high brightness and directivity of the light beam, low energy consumption and long working time make these devices unique. It's no wonder that now there are good lighting fixtures and floodlights based on high-power LEDs, the scope of which is constantly expanding. Automotive, LED street light, traffic lights and office and building lighting, billboards and video surveillance - this is not a complete list, where you can use these devices.
However, in addition to advantages, devices based on LEDs also have certain drawbacks. The main of them, of course, is the high cost of the device. Also, LEDs are afraid of overvoltage, which must be taken into account when creating projects based on such devices. However, the design of the device is simple and even a layman can easily make an LED lamp with his own hands, using a set of inexpensive parts. Its capacity is quite enough to illuminate the room at night. Use LEDs as a night lamp is beneficial, since the consumption of such a device will be several times smaller than a household device based on incandescent lamps.
In order to make an LED lamp with our own hands, we will prepare the necessary details. The housing for the night lamp can be taken from a standard power supply for 5-12 volts. This voltage is also used to power the LEDs. On the outside of the plastic body, drill holes and secure the LEDs. Fasten as much as possible, usually placed from three to five - it all depends on the power of the device. Suppose you have five LEDs connected in parallel and a total power of 100 mA. At a voltage of 12 V, it is necessary to limit the consumption of the entire circuit to a 120 Ohm resistor. It is also desirable to apply a 100-150 mA fuse. Observe the sequence of the LED assembly. Anodes of instruments must Be assembled together and go through the limiting resistor to plus the power source, the cathodes, respectively, through the fuse-in - into the negative. Pay attention to the power of the power supply. It must exceed the power consumption of the load. All - you made the LED lamp with your own hands. Its power is small, but it is quite enough to illuminate the room at night.
Now you can go further and make a more powerful device that will save you from overpaying bills for electricity. LED lamp itself can be made for the office, because it's no secret that commercial organizations pay for electricity at inflated tariffs. As a case, you can use a standard fluorescent lamp, removing all the details from it and leaving one case. We attach aluminum LED bars inside the case and feed the entire circuit from a standard power source. You've got an office LED light, which you can illuminate a large area.