Why do LEDs burn out in a car?
I inserted the LEDs in the door card of the car (so that the illumination of the door opener would flicker slightly in the dark), but 2-3 months are enough and the LEDs burn out. Tell me what to do and whether replacing 12v LEDs with 24volt will help?
What LEDs have you inserted? By themselves, LEDs for 12 or 24V are not sold, there are LED lamps with this voltage. 24V - most likely it will not shine. connect them through the stabilizer on the "Krenka" or a modern analogue of the L7812 microcircuit - they should burn longer, or through a resistor, but in order to calculate its resistance you need to know the LED parameters. They burn out due to increased voltage in the on-board network, because when the engine is running at speed, it exceeds 14V.
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The resistor is incorrectly selected, the 12V LED usually has 300 Ohms, it is designed to reset 300 * 0.02 = 6v voltage, because He himself works from 6 volts and his current strength is 0.02A. But this is only suitable for stable equalized current. But in the car there is no mention at all, the voltage jumps there at the time of start-up, and after connecting the generator a jump to 14.7 volts and of course here the LED is fed through the resistor 8.7 volts, from which it burns out (or its resistor burns out It is very weak 0.25W). It is necessary to solder a 400-425 Ohm resistor to such diodes, then it will not burn, but it will burn dull. Or to make a full-fledged driver for it, but it is expensive.