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Originally Posted by SuperDanman
First, can the Edubot generate a PWM signal with a frequency fast enough for the blink not to be 'detected' by the human eye? When I attached a status LED to this year's IR beacon, a flicker was recognized, much like some people can detect the 70-75Hz flicker of computer monitor.
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Why not measure it and see?
The IR beacons aren't simple PWM signals. They are driven with short bursts of high-frequency pulses. The bursts repeat at a rate low enough that you can perceive as a flicker.
I don't know what the PWM frequency is, but I'd be
very surprised if it were slow enough to detect with your eyes.