How to power any LED and NOT turn it to smoke?

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0:00 How to power any LED without turning it to smoke?
0:58 What is the difference between an LED and an LED-based lamp?
1:46 Why do LEDs have current rating and no voltage rating?
2:30 Diode parameters, schematic symbol and pinout.
3:18 What is the current flow direction in semiconductors?
4:16 Diode voltage drop and how to check it with multimeter.
5:59 Diode stabilizing voltage drop on its terminals.
6:45 Stepping down diode voltage with a serial resistor.
8:27 How to find out LED typical forward current value?
9:08 Powering and LED strip from a salvaged 220v LED bulb.
11:55 Powering multiple LEDs using a serial resistor setup.
13:04 How to correctly group the LEDs to power them from 12v?
18:30 Choosing serial resistor power rating in an LED circuit.
19:18 Wiring two resistors in parallel to double power rating.
19:50 Finding faulty LEDs and powering a salvaged GU10 220v LED bulb.
20:57 Powering a 7 by 3 LED strip from a 220v LED bulb.
21:32 Final formula for LED serial resistor value calculation.