It happens that the current consumption of a particular load is too high. It quickly discharges the battery or battery, triggers the protection in the power supply, or overconsumption of electricity. Is it possible to reduce this current?
Instructions
Step 1
To reduce the current consumed by an incandescent lamp, simply reduce the voltage across it in one way or another (for example, by connecting two lamps in series or using a dimmer). The consumed current will not change linearly, in the case of a conventional resistor, but according to a more complex law, since the resistance of the filament depends on temperature. For this reason, the power allocated to the light bulb will also change not according to a quadratic, but according to a more complex law. In addition, it was noted that reducing the voltage on a light bulb by half can extend its service life by 10-100 times, but its efficiency, which is already very small for this light source, will also decrease several times.
Step 2
Similarly, that is, by lowering the supply voltage, try to reduce the current draw of any other resistive load, for example, a heater, of course, with a corresponding reduction in the power dissipation. The same can be done with the LED by increasing the value of the current-limiting resistor.
Step 3
Remember, however, that there are exceptions to every rule. Do not try, for example, to power the switching power supply with too much voltage - with a decrease in the input voltage, its current consumption, on the contrary, increases. If it is too small, such a unit may even fail. But it should not be assumed that to reduce the current consumption of the switching power supply unit, it should be supplied with increased voltage. This is also dangerous for him.
Step 4
Also, do not try to reduce the current consumption of the induction motor in this way, and in relation to the collector motor, this operation should be carried out with caution. If the voltage is reduced enough that the motor stalls under load, it may burn out. This problem can be solved when using a collector motor by using a current stabilizer instead of a voltage stabilizer.
Step 5
Some types of lighting fixtures - fluorescent and halogen lamps - cannot tolerate prolonged low current supply. The former fail in this case for the reason that mercury does not pass from a liquid to a gaseous state. A discharge in an inert gas atmosphere without mercury impurities is detrimental to the electrodes. Secondly, at a low temperature of the thread, the so-called halogen cycle does not begin. In addition, both lamps are sometimes powered from the mains through switching power supplies.
