User Guide Of Three Channel PWM
Module Features:
Output of three-channel PWMat the same time, Adjustable frequency, 3-channel frequency output consistent, duty ratio can be independently adjusted, suitable for most occasions
Lcd can display frequency and duty datio,Easy to oprate;
Wide frequency range, high precision;
Support Serial operation
First, Module description
Three-channel PWM is outputted, wide frequency range and the duty ratio can be adjusted independently;
Frequency is divided into four areas, automatic switching:
XXX (No decimal point): 1HZ Stepping Unit, Range: 1Hz~999Hz;
X (The decimal is in the hundreds place): 0.01KHZ Stepping Unit, Range: 1.00Khz~9.99Khz;
XX(The decimal is in the tensplace): 0.1KHZ Stepping Unit, Range: 10.0Khz~99.9Khz;
X.X(The decimal is in the onesplace): 1KHZ Stepping Unit, Range: 1Khz~150Khz;
E.g. , frequency display: 100 represent the pulse of 100Hz ;
1.01 represent the pulse of 1.01KHz;
54.1 represent the pulse of 54.1KHz
1.2.4 represent the pulse of 124Hz
The value rangeof dutyfactor: 0~100%, 100% is represented by A0%.
All parameters setted up can be automatically saved in case of power cut.
Second, Parameter settings
Module has 8 independent keys, used to set the frequency and duty ratio, support short press (increase or decrease a unit) and long press (fast increase or decrease), very simple, set the parameters automatically save, power loss.
3-Way duty ratio button can be pressed at the same time, real-time adjustment, liquid crystal display is the last pressed button duty ratio, real-time is very strong, can be used as a simple several road duty ratio scan.
Third, Module Parameters:
1.Operating voltage: 3.3~30V;
Frequency range: 1Hz~150KHz;
Frequency accuracy: In each range of accuracy is about 2%
Signal load capacity: Output current can be around 5~30ma
Output amplitude: PWM amplitude and supply voltage equal
Ambient temperature: -20~+70°C.
Fourth, Scope of application:
Used as square wave signal generator to generate square wave signal for experiment development and use
Used to generate a square wave signal to control the motor driver;
Generating adjustable pulses for MCU use;
Generate adjustable pulse, control related circuit (PWM dimming speed and other applications).
Fifth, UART Serial command
Baud rate: 9600 bps Data length: 8
Stop bits :1
Check digit:none
Flow control: none
Set the frequency of the PWM
"F101": Set frequency of 101 HZ (001~999)
"F1.05": Set frequency of 1.05 KHZ (1.00~9.99)
"F10.5": Set frequency of 10.5KHZ (10.0~99.9)
"F1.0.5": Set frequency of 105KHZ (1.0.0~1.5.0)
Set the duty ratio of PWM
"DX:YYY": Set PWM duty ratio x: (1~3) PWM serial number, YYY: (000~100) duty ratio;
For example d1:050, set 1th PWM duty ratio to 50%
Read Setup parameters
Send a "read" string to read the parameters of the setting.
Message format: F156, D1: 052, D2: 059, D3: 058,
Set successful return: DOWN
Set failed to return: FALL
Package Included:
1 x 3 Way PWM Pulse Frequency Signal Generator Module LCD Display Duty Cycle Adjustable
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