I expect these diodes take too much current to be supplied by an Arduino pin , and need a current limiting resistor anyhow . Running two in series probably wouldn’t work on 5v either , as said
Look at the data sheet for details
I expect these diodes take too much current to be supplied by an Arduino pin , and need a current limiting resistor anyhow . Running two in series probably wouldn’t work on 5v either , as said
Look at the data sheet for details