XY-LPWM3 DC3.3-30V 3-channel frequency 1Hz-150KHz duty cycle 0-100 adjustable instrument PWM signal generator with LCD display instrument

Module features:
  

1. Three PWM outputs at the same time, The frequency is adjustable, the three frequency outputs are consistent, and the duty cycle can be adjusted independently, suitable for most occasions
2. The LCD screen can display frequency and duty cycle data and is easy to operate;

3. Wide frequency range and high precision;

4. Support serial port operation

1. Module description

Three-channel PWM output, wide frequency range, duty cycle can be adjusted independently;

The frequency is divided into four areas and automatically switched:

1. XXX (no decimal point): 1HZ stepper unit, Range: 1Hz~999Hz;
2. X.XX (decimal point in hundreds): 0.01KHZ step unit, Range: 1.00Khz~9.99Khz;
3. X.XX (decimal point in tens place): 0.1KHZ step unit, Range: 10.0Khz~99.9Khz;
4. XXX (the decimal point is in the ones place): 1KHZ step unit, Range: 1Khz~150Khz;

For example, frequency display: 100 represents a pulse of 100Hz;

1.01 represents a pulse of 1.01KHz;

54.1 represents the pulse of 54.1KHz

1.2.4 Represents 124Hz pulse

• Duty cycle value range: 0~100%, 100% is represented by A0%.

All set parameters can be automatically saved when power is off.

2. Parameter settings

The module has 8 independent buttons for setting 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. The setting parameters are automatically saved and powered off.

The 3 duty cycle buttons can be pressed at the same time and adjusted in real time. The LCD displays the duty cycle of the last button pressed, which is very real-time and can be used as a simple duty cycle scan of several channels.

3. Module parameters:

1. Working voltage: 3.3~30V;

2. Frequency range: 1Hz~150KHz;

3. Frequency accuracy: Approximately 2% accuracy in each range

4. Signal load capacity: Output current is about 5~30ma

5. Output amplitude: PWM amplitude is equal to the power supply voltage

6. Ambient temperature: -20~+70℃.

4. Scope of application:

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

2. Used to generate square wave signals to control motor drivers;

3. Generate adjustable pulses for MCU use;

4. Generate adjustable pulses to control related circuits (PWM dimming speed and other applications).

5. UART serial port command
 

Baud rate: 9600 bps Data length: 8
Stop bit: 1
Check digit: none
Flow control: none

1. Set the frequency of PWM

"F101": Set frequency 101HZ (001~999)

"F1.05": Set frequency 1.05KHZ (1.00~9.99)

"F10.5": Set frequency 10.5KHZ (10.0~99.9)

"F1.0.5": Set frequency 105KHZ (1.0.0~1.5.0)

1. Set the duty cycle of PWM

"DX:YYY": Set PWM duty cycle x: (1~3) PWM sequence number, YYY: (000~100) duty cycle;

For example, d1:050, set the first PWM duty cycle to 50%

1. Read setting parameters

Send a "read" string to read the set parameters.

Message format: F156,D1:052,D2:059,D3:058,

Successful setting returns: DOWN

Setting failure returns: FALL