17
edits
Changes
Jump to navigation
Jump to search
Line 30:
Line 30: + + + + + + +
Pulse Position Modulation (view source)
Revision as of 07:35, 6 November 2015
, 07:35, 6 November 2015no edit summary
* The transimpedance amplifier doesn't get the signal up to logic level, so we're using an analog input to read the signal. That's not as fast as amplifying the signal in hardware (which is what the new amplifier board does) and then reading it with a digital input. This will likely be your limiting factor.
* The transimpedance amplifier doesn't get the signal up to logic level, so we're using an analog input to read the signal. That's not as fast as amplifying the signal in hardware (which is what the new amplifier board does) and then reading it with a digital input. This will likely be your limiting factor.
* There's a potentiometer near the big chip next to the LED. Turning that to the right increases the brightness of the LED. If you turn it too far to the right, the LED will give you a bright flash and permanently die. Keep it to a half turn or less.
* There's a potentiometer near the big chip next to the LED. Turning that to the right increases the brightness of the LED. If you turn it too far to the right, the LED will give you a bright flash and permanently die. Keep it to a half turn or less.
== PPM Code Repositories ==
https://developer.mbed.org/users/tteisberg/code/Optical3cmRX/
https://developer.mbed.org/users/tteisberg/code/Optical3cmTXnucleo/
Ask Thomas for access.
[[Category:Optical Communications]]
[[Category:Optical Communications]]