Package includes: 1 piece of signal generator module
Module highlights:
1. 3-channel PWM output, adjustable frequency, consistent 3-channel frequency output, independent adjustment of duty cycle, suitable for most occasions;
2. LCD liquid crystal display frequency and duty cycle, very clear, very convenient to adjust
3. Wide frequency range and high precision;
4. Serial communication
First, the module description:
3-way PWM output, wide frequency range, duty cycle can be adjusted independently and in real time;
The frequency is divided into four ranges and is automatically switched:
1. XXX (no decimal point): the minimum unit is 1 Hz, and the value ranges from 1 Hz to 999 Hz.
2. The minimum unit of X.XX (the decimal point is in the hundred digits) is 0.01Khz, and the value range is 1.00Khz~9.99Khz;
3. XX.X (decimal point is ten): the minimum unit is 0.1Khz; the value range is 10.0KHz~99.9KHz
4. X.X.X (decimal point in ten and hundred): the minimum unit is 1Khz; the value range is 1KHz~150KHz
E.g. Frequency display: 100 means PWM output 100Hz pulse;
1.01 indicates that the PWM outputs a pulse of 1.01K;
54.1 indicates that the PWM outputs a pulse of 54.1 kHz;
1.2.4 indicates that the PWM output is a pulse of 124KHz;
The duty cycle value ranges from 0 to 100%, of which 100% is represented by A0%.
All setting parameters are saved after power down.
Second, the parameter settings
The module has 8 independent buttons for setting the frequency and duty cycle. It supports short press (increase or decrease one unit) and long press (fast increase or decrease). It is very simple. The parameters are automatically saved after setting. Lost.
The 3-way duty button can be pressed at the same time, real-time adjustment, the liquid crystal display is the duty cycle of the last pressed button, real-time is very strong, can be used for simple several-way duty cycle scanning.
Third, the 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 around 5~30ma;
5. Output amplitude: The PWM amplitude is equal to the supply voltage;
6. Ambient temperature: -20~+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 controls the 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 (microcontroller TTL level communication)
Communication standard: 9600 bps data bits: 8
Stop bit :1
Check digit :none
Flow control : none
1, set the frequency of the 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 the PWM
“Dx:yyy”: set the duty cycle of PWM x: (1~3) PWM serial number, yyy: (000~100) duty cycle %;
For example, D1:050, set the first PWM duty cycle to 50%.
3, read the setting parameters
Send a "read" string and read the set parameters.
The read data format is as follows: F156, D1: 052, D2: 059, D3: 058,
Set the success to return: DOWN;
Setting failed to return: FALL.
