A Simple Method to Find LED Voltage
It is a simple tip you can use when you want to find your LED voltage. If you have an LED that you don’t know the voltage for – you can use a multimeter to find it. Choose the little diode symbol on your multimeter. Connect the test leads to your LED. The short leg of the LED must connect to the COM-terminal on the multimeter, and the long leg to the other terminal. If you’ve connected it correctly, and your LED is not damaged, you should now see the LED light up. Super simple! Not all multimeters have this, but a lot of them do.