Forum Discussion
Altera_Forum
Honored Contributor
15 years agouser LED circuit on EP3C120F780 development kit
Hi, I checked the schematics of user LED ciruity on EP3C120F780 development board, the ciruit seems weird to me. The LED anode is connected to 3.3 through 56 ohm resistor and the cathode...
Altera_Forum
Honored Contributor
15 years agoa LED does not have a voltage drop of 0.7V.
Depending on the color, you have a voltage drop of about 1.9 to 3.5V. see https://secure.wikimedia.org/wikipedia/en/wiki/light-emitting_diode