ok so full disclosure i'm not an electronics expert i just like tinkering with stuff and learning so hopefully you don't go too hard on me lol.
so anyway my current project is replacing the 4x 5mm red led's in my technics 1210 mk5 with blue ones and i've been watching a video of a guy on youtube showing people how to do it and in the video he's claiming that if i want to go blue i need to add a 470 ohm resistor in line.
so whats confusing me is this if both red and blue led's have the same forward current specification of 20ma and the red has a lower forward voltage requirement of 1.8v than the blue 3.8v why would i need a resistor? would the blues not actually need more current rather than less?
maybe i'm mixing this all up but it's been bugging me for a while and i'd appreciate it if someone could set me straight please.
thanks in advance
so anyway my current project is replacing the 4x 5mm red led's in my technics 1210 mk5 with blue ones and i've been watching a video of a guy on youtube showing people how to do it and in the video he's claiming that if i want to go blue i need to add a 470 ohm resistor in line.
so whats confusing me is this if both red and blue led's have the same forward current specification of 20ma and the red has a lower forward voltage requirement of 1.8v than the blue 3.8v why would i need a resistor? would the blues not actually need more current rather than less?
maybe i'm mixing this all up but it's been bugging me for a while and i'd appreciate it if someone could set me straight please.
thanks in advance