When creating an LED strip, the main trick is to correctly connect the element base. The manufacturer chooses the components that provide the specified characteristics at the lowest cost. Competition leads to the formation of an average price, the manufacturer’s natural desire is not to fall into the lower segment, but to sell a cheaper product for the average price. The quality should not be too different from the analogs on the market. Today we consider the device and technical characteristics of LED lamps.
A little about
LEDs The ordinary consumer is able to assemble the LED strip. Standardly manufacturers put on three points of luminescence 1 resistor. Therefore, it is convenient to use the LED blocks to 3 V, limiting the current( according to the technical characteristics) with a resistor, and powering the design from the 12 V block dominating the market. Alternatives:
- Use of industrial voltage. LEDs are full members of their family, they rectify the current. Based on this statement, assemblies are constructed that feed directly from the outlet. Example: we recruit pieces of 40 LED blocks, connected in parallel. On each falls 5 V. More accurate calculations are not required. To use both half-periods of a sine wave, we create a second branch parallel to the first, but we connect the LEDs in opposite directions. The second branch works in antiphase. Both are switched on alternately. Minus - at zero( in the graph node) all the LEDs go out. There is a blinking, indistinguishable by the eye, but acting on the psyche.
- Reliable LED lights, including ribbons, use their own power supply. The simplest is a smoothing capacitor built into the inside of an LED light bulb. The circuit that feeds the source is called the driver. It is built according to the diode bridge scheme, but the principles of voltage transmission are different. The rectified voltage feeds the high-frequency generator chip, which supplies power through a pulse transformer to the load. This principle is implemented by EKF. Schemes are used more simply, where the rectified voltage is filtered and fed to the LED elements. Realizing any principle, withstand voltage.
We discuss technical details because the owner is able to disassemble an LED light bulb and borrow a circuit from it. The last thing to do is to collect a source that supplies energy to the tape with hundreds or thousands of LEDs. We remind each driver is characterized by its own maximum load capacity. It is impossible to remove the surviving elements from a burnt-out LED light bulb and use it directly.
Do the following:
- extract the driver;
- selects to it the LED elements of the same voltage, which consume 5 to 10 times less power;
- connect all sources in parallel;
- set limit resistors.
The set of elements is possible in any order. Suppose we have 3 V LED arrays, the driver gives 50. We collect garlands of 15 - 16 arrays, set a limiting resistor. Then we check the final power. If there is no overrun, we hang two garlands in parallel.
Detailed explanations are given so that readers understand: there is no single design of LED strips, the number of sources is different. On the Internet, it is easy to find pictures showing the contents of the EKF lamp: more than two dozen LED arrays. It remains to expand them with tape. As for the driver, such chips can be fixed. Through online stores acquire any element base. It remains to collect the tape.