Description

Module Features:

1. Simultaneously output three channels of PWM, the frequency is adjustable, the frequency of the three channels is the same, and the duty cycle can be adjusted independently, which is suitable for most occasions

2. LCD can display frequency and duty cycle, easy to operate;

3. Wide frequency range and high precision;

4. Support serial operation

1. Module description

Three-channel PWM output, wide frequency range and duty cycle can be adjusted independently; the frequency is divided into four zones, and it is automatically switched:

1.XXX(Nodecimalpoint): 1HZ step unit, range: 1Hz~999Hz;

2.X.XX (hundreds decimals): 0.01KHZ step unit, range: 1.00Khz~9.99Khz;

3.X.XX(Thedecimalisinthetensplace): 0.1KHZSteppingUnit, range: 10.0Khz~99.9Khz;

4.X.X.X(Thedecimalisintheonesplace): 1KHZSteppingUnit, range: 1Khz~150Khz;

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

1.01 represents the pulse of 1.01KHz;

54.1 represents the pulse of 54.1KHz

1.2.4 means 124Hz pulse

The value range of the duty factor: 0~100%, 100% is expressed as 0%. All set parameters can be automatically saved in case of power failure.

2. Parameter setting

The module has 8 independent buttons for setting frequency and duty cycle. It supports short press (increase or decrease unit) and long press (fast increase or decrease). It is very simple. The setting parameters are automatically saved and power off. You can press the 3-way duty ratio button at the same time to adjust in real time. The LCD display is the duty ratio of the last button pressed. It is very real-time and can be used as a simple roaddutyratioscan.

3. Module parameters:

1. Working voltage: 3.3~30V;

2. Frequency range: 1Hz~150KHz;

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

4. Signal load capacity: the output current can be around 5~30ma

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

6. Ambient temperature: -20~+70℃.

4. Scope of application:

1. Use das square wave signal generator to generate square wave signal experimental development and use

2. Used to generate square wave signal to control the motor driver;

3. Generate adjustable pulses for MCU use;

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

5. UART serial command

Baud rate: 9600bps Data length: 8

stop bit: 1

Check Digit: None

Flow Control: None

1. Set the frequency of the PWM

"F101": set the frequency to 101HZ (001~999)

"F1.05": set the frequency to 1.05KHZ (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":SetPWMdutyratiox:(1~3)PWMserial

number,YYY:(000~100) duty cycle;

For example 1:050,set1thPWMdutyratioto50%

3. Read the setting parameters

Send the "read" string to read the parameters in the setup.

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

Set successfully and return: DOWN

Setting failure returns: FALL