Pwm signal generator pulse frequency duty cycle adjustment module adjustable square wave rectangular source | Инструменты

User Guide Of Three Channel PWM Module Features: 1.Output of three-channel PWM at the same time, Adjustable frequency, 3-channel frequency output consistent, duty ratio can be independently adjusted, suitable for most occasions 2.Lcd can display frequency and duty datio,Easy to oprate; 3.Wide frequency range, high precision; 4.Support Serial operation Module description Three-channel PWM  is outputted,wide frequency range and the duty ratio can be adjusted independently; Frequency is divided into four areas, automatic switching： 1.XXX(No decimal point): 1HZ Stepping Unit, Range: 1Hz~999Hz; 2.X.XX(The decimal is in the hundreds place):0.01KHZ Stepping Unit, Range: 1.00Khz~9.99Khz; 3.X.XX(The decimal is in the tens place):0.1KHZ Stepping Unit, Range: 10.0Khz~99.9Khz; 4.X.X.X(The decimal is in the ones place): 1KHZ Stepping Unit, Range: 1Khz~150Khz; e.g. ,frequency display:100 represent the pulse of 100Hz ; 1.01 represent the pulse of 1.01KHz;  54.1 represent the pulse of 54.1KHz 1.2.4 represent the pulse of 124Hz The value range of dutyfactor: 0~100%,100% is represented by A0%. All parameters setted up can be automatically saved in case of power cut. Parameter settings Module has 8 independent keys, used to set the frequency and duty ratio, support short press (increase or decrease a unit) and long press (fast increase or decrease), very simple, set the parameters automatically save, power loss.     3-Way duty ratio button can be pressed at the same time, real-time adjustment, liquid crystal display is the last pressed button duty ratio, real-time is very strong, can be used as a simple several road duty ratio scan. Module Parameters： 1.Operating voltage：3.3~30V； 2. Frequency range：1Hz~150KHz； 3. Frequency accuracy: In each range of accuracy is about 2% 4. Signal load capacity: Output current can be around 5~30ma 5. Output amplitude: PWM amplitude and supply voltage equal  6. Ambient temperature：-20~+70℃。 四、Scope of application： 1. Used as square wave signal generator to generate square wave signal for experiment development and use 2. Used to generate a square wave signal to control the motor driver; 3. Generating adjustable pulses for MCU use; 4. Generate adjustable pulse, control related circuit (PWM dimming speed and other applications). UART Serial command Baud rate:9600 bps Data length:8 Stop bits :1 Check digit:none Flow control:none 1.set the frequency of the PWM  “F101”: Set frequency of 101 HZ     (001~999) “F1.05”: Set frequency of 1.05 KHZ (1.00~9.99) “F10.5”: Set frequency of 10.5KHZ  (10.0~99.9) “F1.0.5”:Set frequency of 105KHZ  (1.0.0~1.5.0) 2.set the duty ratio of PWM "DX:YYY": Set PWM duty ratio x: (1~3) PWM serial number, YYY: (000~100) duty ratio; For example d1:050, set 1th PWM duty ratio to 50% 3.Read Setup parameters Send a "read" string to read the parameters of the setting. Message format：F156,D1:052,D2:059,D3:058， Set successful return：DOWN Set failed to return：FALL