I would like to build a proper laser driver and use an audio output to modulate the laser output.
At the moment, I connected the audio output instead of the battery in a laser pointer. It works, but the laser signal is very weak and I would like to use laser diodes instead of laser pointers. The ready-built laser drivers often use TTL signals, MHz modulation or not enough current. The laser can handle currents up to 26mA. A circuit plan would be great!
Final Project: I would like to use the audio line output to modulate the laser and use the audio line input to read the photodiode signal, laser audio communication setup.
This previous question (link) is amazing, but I have an analogue signal and not a TTL signal.
Thanks a lot in advance.