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PWM Pulse Frequency Duty Cycle Adjustable Module Square Wave Rectangular Wave Signal Generator XY-LPWM
PWM pulse frequency duty cycle adjustable module square wave rectangular wave signal generator
Module highlights:
1. LCD displays frequency and duty cycle clearly, and PWM output can set frequency and duty cycle separately;
2. Wide frequency range and high accuracy;
3. Serial communication
1、 Module description
PWM output, frequency and duty cycle can be set separately;
The frequency is divided into four ranges, with automatic switching:
1. XXX (no decimal point): the minimum unit is 1Hz, and the value range is 1Hz~999Hz;
2. The minimum unit of X. XX (decimal point is in the hundreds) is 0.01Khz, and the value range is 1.00 Khz~9.99Khz;
3. XX. X (decimal point is in the tenth place): the minimum unit is 0.1Khz; Value range: 10.0KHz~99.9KHz
4. X.X.X (decimal places are in the tens and hundreds): the minimum unit is 1 Khz; Value range: 1KHz~150KHz
e. G. Frequency display: 100 indicates PWM output pulse of 100Hz;
1.01 means PWM output 1.01K pulse;
54.1 represents the pulse of 54.1KHz PWM output;
1.2.4 Pulse indicating PWM output 124KHz;
Value range of duty cycle: 0~100%;
All setting parameters are saved after power failure.
2、 Parameter setting
The module has four independent keys to set the frequency and duty cycle. It supports short press (increase or decrease by one
unit) and long press (quickly increase or decrease). It is very simple. After setting parameters, they are automatically saved and
will not be lost in case of power failure.
3、 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: PWM amplitude is equal to power supply voltage;
6. Ambient temperature: - 20~+70 ℃.
4、 Scope of application:
1. It is used as a square wave signal generator to generate square wave signals for experimental development;
2. Square wave signal used to control motor driver;
3. Generate adjustable pulse for MCU;
4. Generate adjustable pulses and control related circuits (PWM dimming and speed regulation applications).
Communication standard: 9600 bps Data bit: 8
Stop bit: 1
Check bit: none
Flow control: none
1. Set the frequency of PWM
"F101": set the frequency to 101 HZ (001~999)
"F1.05": set the frequency to 1.05 KHZ (1.00~9.99)
"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
"DXXX": set the PWM duty cycle to XXX; (001~100)
For example, D050, set PWM duty cycle to 50%
3. Read setting parameters
Send the "read" string to read the set parameters.
If the setting is successful, it returns: DOWN;
Failed to set, return: FALL.