I'm so ashamed I forgot this important information after going to school for electronics many years ago, but here I am asking for some help. This is a very simple circuit, but I forgot OHMs Law and I'm not good with math.
Supply : 12v 300mA
LED 1 : 3.5/4v 20mA
LED 2 : 3.5/4v 20mA
LED 3 : 3.5/4v 20mA
Series Circuit
I need to step the current down from 300mA to 20mA to keep the LEDs from burning out. Please remind this old man the formula so I can perform future projects w/o feeling stupid.
Thanks
Supply : 12v 300mA
LED 1 : 3.5/4v 20mA
LED 2 : 3.5/4v 20mA
LED 3 : 3.5/4v 20mA
Series Circuit
I need to step the current down from 300mA to 20mA to keep the LEDs from burning out. Please remind this old man the formula so I can perform future projects w/o feeling stupid.
Thanks