PWM Module having Adjustable Frequency & Duty Cycle with LCD Display

A very low cost module (< $3) with excellent Features: LCD display of frequency and duty cycle  PWM output can be set to the specified frequency and duty cycle. Wide frequency range with high accuracy; Serial communication features, TTL level Parameter settings The module has four independent buttons, used to set the frequency and duty cycle, momentary press (increase or decrease by a unit) and long press (fast increase or decrease). Parameters get automatically saved, even after switching off and then switching on. PWM output, one can set frequency & duty cycle; It has 4 Frequency ranges, automatic switching: 1   xxx (no decimal point): the smallest  is 1Hz, range  1Hz to 999Hz; 2   x.xx (decimal point at hundred) the smallest is 0.01Khz, trange of 1.00Khz to 9.99Khz; 3   xx.x (decimal at in ten): the smallest unit is 0.1Khz; value range…

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