I need to send data over a wireless link, not far - max 50m. I have plenty of laser diodes, 1-5mW, with glass lenses that can be adjusted. I would rather avoid buying a 'receiver', since I can probably build one faster than it can be shipped. I understand that LEDs can generate a few microamps when hit with a weak laser beam. What's the best colour LED for this? And what's the best way to build a minimal amplifier? I would prefer not using an op-amp.
My MCU responds to 3V3 and 5V, though I can probably make use of 1-2V as well.
Thanks in advance.