Description Description Description: LCD display frequency and duty cycle, very clear, PWM output, can be set to the frequency and duty cycle. Wide frequency range, high precision. Serial communication, TTL level. Frequency is divided into four ranges, automatic switching. All set parameters, power-down automatically saved. Application Range: 1. Used as a square wave signal generator, generate square wave signal for experimental development and use; 2. Used to generate a square wave signal that controls the motor driver; 3. generate adjustable pulse for MCU use; 4. generate adjustable pulse, control the relevant circuit (PWM dimming speed and other applications). Specification: Frequency is divided into four ranges, automatic switching: 1. XXX (no decimal point): the smallest unit is 1Hz, the value range of 1Hz ~ 999Hz; 2. X.XX (decimal point in the hundred) the smallest unit is 0.01Khz, the range of 1.00Khz ~ 9.99Khz; 3. XX.X (decimal point in ten): the smallest unit is 0.1Khz; value range of 10.0KHz ~ 99.9KHz 4. X.X.X (decimal point in ten and hundred): the smallest unit is 1Khz; value range 1KHz ~ 150KHz Duty Cycle Range: 0 ~ 100% Module Parameters: Working Voltage: 3.3~30V; Frequency Range: 1Hz~150KHz; Frequency Accuracy: about 2%; Signal Load Capacity: Output Current can be about 5~30mA; Output Amplitude: PWM amplitude equal to the supply voltage; Ambient Temperature: -20~70. Size: 79x43x26mm/3.11x1.69x1.02 inch Serial Control (single-chip TTL level communication): Communication Standard: 9600 bps Data bits: 8 Stop Bit: 1 Check Digit: none Flow Control: none Set successfully