No one needs convincing about the benefits of using LEDs in lighting.
Pre submitted power supply provides the correct parameters of the diodes. This system is a stabilizer pulse current. A schematic diagram is shown in Figure. 1.
rice. 1
Stabilizer may be supplied on a DC voltage in the range 6 … 17 AT. The output current is controlled by potentiometer PR1.
Figure. 2 shows the output current characteristics as a function of resistance PR1.
rice. 2
The range of changes is between 50 mA to 1,2 BUT. MBI1801 circuit has built-in thermal protection, which protects it from damage. When the temperature reached 165 ° C yield deactivated. The device consists of only eight elements and complex assembly. After assembly only requires adjustment of the output current. The easiest way to do this – an ammeter connected in series with LEDs. Before turning on the power PR1 potentiometer should be set at maximum resistance. The input voltage should be about 2 … 3 The above, than necessary for the diode. Now turn on the power and set the desired output current using potentiometer PR 1. It may also be, that the limiting values of the output current and the supply voltage required radiator chip MBI1801. It should also be remembered, that the minimum voltage shall be at least 6 AT.
rice. 3