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The Optical Communications hobbyists have been using this idea since LEDs first arrived nearly 50 years ago. It sure makes things easier to use the same optica
by Johnythree 8y ago
The Optical Communications hobbyists have been using this idea since LEDs first arrived nearly 50 years ago.
It sure makes things easier to use the same optical system (lens, etc) for TX and RX.
The only problem is that LEDs make a fairly poor Optical sensor.