3 csatornás PWM impulzusfrekvenciás munkaciklus állítható modul négyszögletes téglalap alakú jelgenerátor
3 channels PWM pulse frequency duty cycle adjustable module square wave rectangular wave signal generator
Module highlights:
1. 3-way PWM output, adjustable frequency, consistent 3-way frequency output, independent duty cycle adjustment, suitable for most occasions;
2. The frequency and duty cycle of LCD are very clear and easy to adjust
3. Wide frequency range and high precision;
4. Serial communication
Module description
3-way PWM output, wide frequency range and independent real-time adjustment of duty cycle;
The frequency is divided into four ranges, automatic switching:
1. XXX (without decimal point): the small unit is 1Hz, and the value range is 1Hz ~ 999hz;
2. The small unit of x.xx (the decimal point is in the hundreds) is 0.01khz, and the value range is 1.00khz ~ 9.99khz;
3.     XX. X (decimal point in ten digits): the small unit is 0.1khz; Value range: 10.0khz ~ 99.9khz
4. X.x.x (the decimal point is in the tenth and hundreds): the small unit is 1kHz; Value range: 1kHz ~ 150kHz
e. G. frequency display: 100 indicates that PWM outputs 100Hz pulse;
1.01 indicates PWM output pulse of 1.01k;
54.1 indicates that the PWM outputs a pulse of 54.1khz;
1.2.4 indicates that the PWM outputs 124khz pulses;
Duty cycle value range: 0 ~, where is represented by A0% .
All setting parameters shall be saved after power failure.
 
2、 Parameter setting
The module has 8 independent keys, which are used to set the frequency and duty cycle. It supports short press (increase or decrease by one unit) and long press (increase or decrease quickly). It is very simple. After setting, the parameters are automatically saved and will not be lost in power failure.
The 3-way duty cycle keys can be pressed at the same time for real-time adjustment. The LCD displays the duty cycle of the later pressed keys, which has strong real-time performance and can be used for simple duty cycle scanning.
Three, module parameters:
1. Working voltage: 3.3 ~ 30V;
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 about 5 ~ 30mA;
5. Output amplitude: the PWM amplitude is equal to the power supply voltage;
6. Ambient temperature: - 20 ~ 70 ℃.
4、 Scope of application:
1. Used as square wave signal generator to generate square wave signal for experimental development;
2. Used to generate square wave signal for controlling motor driver;
3. Generate adjustable pulse for MCU;
4. Generate adjustable pulse and control relevant circuits (PWM dimming speed regulation and other applications).
 
5、 Serial port control (single chip microcomputer TTL level communication)
Communication standard: 9600 BPS data bit: 8
Stop bit: 1
Check bit: None
Flow control: None
1. Set PWM frequency
"F101": set the frequency to 101 Hz (001 ~ 999)
Set the frequency to "f1.05" (1.05-1.99 Hz)
"F10.5": set the frequency to 10.5khz (10.0 ~ 99.9)
"F1.0.5": set the frequency to 105khz (1.0.0 ~ 1.5.0)
2. Set the duty cycle of PWM
"DX: YYY": set PWM duty cycle X: (1 ~ 3) PWM serial number, YYY: (000 ~ 100) duty cycle% ;
For example, d1:050, set one PWM duty cycle to 50%
3. Read setting parameters
Send the "read" string and read the set parameters.
The read data format is as follows: f156, d1:052, d2:059, d3:058,
Set successfully, return: down;
Setting failed, return: fall.
 
1005004206570746. - fareast