توسط این ماژول می توان به طور همزمان 2 کانال PWM داشت همچنین این ماژول قابلییت اتصال به درگاه سریال را دارا بوده و توسط میکروکنترلر یا کامپیوتر می توان مقدار Duty Cycle و فرکانس و غیره را ست کرد.

مشخصات

• ولتاز کاری: 5 الی 30 ولت

• پشتیبانی از ولتاژ 5 ولت میکرو USB

• رنج فرکانس تولیدی: 1 هرتز الی 150 کیلو هرتز

• دقت فرکانس تولیدی:2 درصد

• قابلیت اتصال به بارهای 8 الی 39 میلی آمپر

• ابعاد:43×29(mm)

Module highlights:

1. Two independent PWM outputs, which can set the frequency and duty cycle respectively;

2. Wide frequency range and high precision;

3. Serial communication

First, the module description

Two independent PWM outputs, which can set the frequency and duty cycle respectively;

It is divided into three frequency ranges :

1.  XXX ( no decimal point ) : The minimum unit is 1Hz , and the value range is 1Hz~999Hz ;

2.  XX.X ( decimal point is ten ) : The minimum unit is 0.1Khz ; the range is 0.1 K H z~99.9K H z

3.  XXX ( three digits have a decimal point ) : the minimum unit is 1Khz ; the value range is 1K H z~150K H z

Eg frequency display: 100 means PWM output 100Hz pulse;

54.1 represents the PWM output 54.1K H Z pulse;

1.2.4. Represents a PWM output 124K H Z pulse

The duty ratio ranges from 0 to 100 ;

The three frequency ranges share a duty cycle, and all setting parameters are saved after power down.

Second, the parameter settings

The module has three buttons: Set , Up , Down ;

1. By briefly pressing the [ Set ] key , the display of four parameter values (FR1 : PWM1 frequency ; d U1 : PWM1 duty cycle ; FR2 : PWM2 frequency ; dU2 : PWM2 duty cycle ) , there will be a corresponding switch The parameter name flashes prompt.

2. Press [ Up ] and [ Down ] directly to modify the current parameter value ( long press can be added quickly or quickly).

3. The two PWMs are pre-configured with three kinds of frequency values. In the frequency display interface, the long-pressing [ SET ] key is used to switch, and the duty ratios of the three frequencies are the same . ( XXX: range 1Hz ~ 999Hz ; XX.X : the range of 0.1 Khz ~ 99.9Khz ; XXX : range 1Khz ~ 150 Khz , ) .

Third, the module parameters:

1. Working voltage: 5–30V supports micro USB 5.0V power supply;

2. Frequency range: 1Hz~150KHz ;

3. Frequency accuracy: the accuracy in each range is about 2% ;

4. Signal load capacity: the output current can be around 8–30ma ;

5. Output amplitude: default 5V V-pp (can be changed by external power supply);

6. Ambient temperature: -30~+70 °C.

Fourth, the scope of application:

1. Used as a square wave signal generator to generate a square wave signal for experimental development;

2. Used to generate a square wave signal that drives the stepper motor driver;

3. Generate adjustable pulses for use by the MCU ;

4. Generate adjustable pulses and control related circuits ( applications such as PWM dimming speed regulation).

Five , serial port control

Communication standard : 9600 bps
Data bits : 8
Stop position : 1
Check digit : none
Flow control : none

1,  set the frequency of the PWM

“ S1FXXXT ” : Set the frequency of PWM1 to XXX HZ ( 00 1~999)

“ S1FXX.XT ” : Set the frequency of PWM1 to XX.X KHZ ( 00. 1~99 . 9)

“ S1F: XXXT ” : Set the frequency of PWM1 to XXX KHZ ( 0.0. 1 . ~1 . 5 . 0 . )

‘ S 1 ‘ : PWM1

‘ S 2 ‘ : PWM2

‘ F ‘  : frequency

‘ D ‘ : duty cycle

‘ T ‘  is the end flag

2,  set the duty cycle of the PWM

“ S1DXXXT ” : Set the duty ratio of PWM1 to XXX ; ( 00 1~100)

“ S2DXXXT ” : Set the duty ratio of PWM2 to XXX ; ( 00 1~100)

Set the success to return: DOWN ;

Setting failed to return: FALL .