I have a circuit fed by a 5V source which receives audio signals, amplifies them, and modulates an LED so the intensity of the LED changes with the voltage.
Ok so far so good. But what I want to do is to replace the LED with a laser diode. I tried and it behaves as LED.
In many websites I came across they are using a capacitor and diode when connecting a laser diode. Should I connect a laser diode in a different way than an LED? Why?