9V Battery and LED Circuit-Simple LED Circuit

New to the electronics field? I am here to help you. So first of all, turn on the LED. Non-professionals believe that LEDs can be lit using only batteries and wires. In some cases, the LED may come on as it depends on the battery voltage. As a newcomer to this field, you need to learn from the very beginning of these small parts. Otherwise, the LED may burn. LED (Light Emitting Diode) is a kind of diode. Therefore, the operating voltage of all diodes is constant. If the external voltage is higher than the operating voltage, the diode will burn. Therefore, resistors are used to reduce damage to the LEDs. Therefore, this article will show you how to light an LED without burning it. In addition, you can get knowledge about how the working voltage of the LED changes with the color of the LED, and how to choose the right resistor when lighting the LED according to the working voltage and external (battery) voltage ..

参照: 9v battery and led circuit, LED Long Leg Polarity