...
Color | Voltage Drop |
---|---|
Red | 1.7 |
Bright Red | 1.9 |
Orange | 2.0 |
Green | 2.1 |
Bright White | 3.4 |
Blue | 3.4 |
...
Using LEDs
By syncing the LED to the GPIO, you can remove the constraint of the GPIO max current.
Calculating Resistance Needed
For brightest LED without exceeding max GPIO current of 12 mA (ESP8266):
V = I /* R
R = V / I = 3.3/0.012 = 275 ohms
Question:
Should we consider the voltage drop in the following calculation? Should it be:
V = I * R
R = ( Vss - Vdrop ) / I = (3.3 - 1.7) / 0.012 = 133 ohms