Feature:1. 3-way PWM output, adjustable frequency, 3-way frequency output consistent, duty cycle can be adjusted independently, suitable for most occasions;

2. LCD liquid crystal display frequency and duty cycle, very clear, very convenient to adjust

3. Wide frequency range, high precision;

4. Serial communication 

Description:

3-way PWM output, wide frequency range, duty cycle can be adjusted independently in real time;

Frequency is divided into four ranges, automatic switching:1. XXX (no decimal point): the minimum unit is 1Hz, the value range is 1Hz~999Hz;

2. X.XX (decimal point in the hundreds place) the minimum unit is 0.01Khz, the value range is 1.00Khz~9.99Khz;

3. XX.X (decimal point in the tens place): the minimum unit is 0.1Khz; the value range is 10.0KHz~99.9KHz

4. X.X.X (decimal point in tens and hundreds): minimum unit is 1Khz; value range 1KHz~150KHz

e.g. frequency display: 100 means PWM outputs 100Hz pulse;

1.01 means PWM outputs 1.01K pulse;

54.1 means PWM outputs 54.1KHz pulse;

1.2.4 means PWM outputs 124KHz pulse;

duty cycle value range: 0~100%, where 100% is represented by A0%.

All setting parameters are saved when power is off. 

Parameter setting:

The module has 8 independent buttons for setting frequency and duty cycle, supporting short press (increase or decrease by one unit) and long press (quick increase or decrease), which is very simple. After setting the parameters, they are automatically saved and will not be lost when power is off.

The 3-way 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 for simple duty cycle scanning. 

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 power supply voltage;

6. Ambient temperature: -20~+70℃. 

Scope of application:1. Used as a wave square signal generator to generate wave square signals for experimental development;

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

3. Generate adjustable pulses for MCU use;

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

5. Serial port control (MCU TTL level communication)

Communication standard: 9600 bps Data bit: 8Stop bit: 1Parity bit: noneFlow control: none1. 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

'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 duty cycle of the first PWM to 50%3. Read the setting parameters

Send the 'read' string to read the setting parameters.

The read data format is as follows: F156, D1:052, D2:059, D3:058,

Set successfully returns: DOWN;

Set failed returns: FALL.

Package Include:

1× 3-way PWM Pulse Adjustable Frequency Module