Data & Observations
Here is the demonstration video of how the system works given input and resulting output. A fan is placed inbetween the IR break-beam link and things go from there. go watch:
The two fans operate at around 3000 RPM and 2600 RPM which was reflected with an error of about +/-100 RPM. I attribute that mostly to round-off errors in the calculation process. Either way hopefully you are convinced that the system works as designed.
Here is the demonstration video of how the system works given input and resulting output. A fan is placed inbetween the IR break-beam link and things go from there. go watch:
The two fans operate at around 3000 RPM and 2600 RPM which was reflected with an error of about +/-100 RPM. I attribute that mostly to round-off errors in the calculation process. Either way hopefully you are convinced that the system works as designed.