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    2Hz analogWriteFrequency on Teensy 3.1

    I wonder what is the lowest frequency for analogWriteFrequency on Teensy 3.1. When I set it to 20Hz, it works fine. PWM Frequency was 5.xxHz and pulse width was much shorter than set when it was set it to 2Hz. If the limit of frequency setting is < 2Hz, is there work around using intervaltimer?
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