PWMPulse frequency duty cycle, adjustable module square wave rectangular wave signal generator    

Module highlights:

1.LCDLCD display frequency and duty cycle, very clear, PWMThe output can set the frequency and the duty ratio respectively;

2.The frequency range is wide and the accuracy is high;

3.Cable communication

1. Module description

PWMOutput, you can set the frequency and duty ratio;

The frequency is divided into four range, automatic switching:

1. XXX(No small number): The smallest unit is1Hz,Ranges1Hz~999HzItems

2. X.XX(Timing at 100 points) The smallest unit is0.01Khz,Ranges1.00Khz~9.99KhzItems

3.  XX.X(The decimal point is at ten): The smallest unit is0.1Khz;Ranges10.0KHz~99.9KHz

4.  X.X.X (The decimal point is at ten and hundreds): The smallest unit is1Khz;Ranges1KHz~150KHz

e.g. Frequency display:100 expressPWMOutput100HzPulse;

                        1.01 expressPWMOutput1.01KPulse;

                        54.1 expressPWMOutput54.1KHzPulse;

                        1.2.4expressPWMOutput124KHzPulse;

The scope of the duty cycle:0~100%Items

All settings parameters are settled and saved.

Parameter settings

Module is4Independent keys are used to set frequency and duty -occupying ratio, support short pressing (increase or reduce one unit) and long -press (rapid increase or decrease). It is very simple. Set the automatic saving after setting the parameter.

3. Module parameters:

1.Operating Voltage:3.3~30VItems

2.Frequency Range:1Hz~150KHzItems

3.Frequency accuracy: accuracy in each range is2%about;

4.Signal load capacity: output current can5~30maabout;

5.Output amplitude:PWMThe amplitude value is equal to the power supply voltage;

6.Environmental temperature:-20~+70℃.

4. Scope of application:

1.Use as a square wave signal generator to generate square wave signals for experimental development and use;

2.The square wave signal used to generate a controller driver;

3.Generate pulses, for supplyMCUuse;

4.Generate adjustable pulses and control related circuits (PWMApplication such as lighting speed and adjustment).

Serial control(Single -chip machineTTLLevel communication)

Communication standard:9600 bpsData position :8
Stop :1
Check Digit :none
Flow control :none

1,         set upPWMFrequency of

"F101":Set the frequency to101 HZ     (001~999)

"F1.05":Set the frequency to1.05 KHZ      (1.00~9.99)

"F10.5":Set the frequency to10.5KHZ (10.0~99.9)

"F1.0.5":Set the frequency to105KHZ  (1.0.0~1.5.0)

2,         set upPWMDuty cycle

"Dxxx":set upPWMThe occupation ratio isXXXItems(001~100)

For exampleD050,set upPWMThe occupation ratio is50%

3,         Read the setting parameter

send"read"String, read the setting parameters.

Set the successful return:DOWNItems

Settings failure returns:FALLEssence