PWM pulse frequency adjustable duty cycle square wave module rectangular wave signal generator XY-LPWM

PWM pulse frequency adjustable duty cycle square wave module rectangular wave signal generator XY-LPWM

Module Highlights:

1.LCD frequency and duty cycle liquid crystal display, clear, PWM outputs, can set the frequency and duty cycle, respectively;

2. The wide frequency range, high accuracy;

3. The serial communication can be

First, module description

PWM output, the frequency may be provided separately, the duty ratio;

Frequency range is divided into four, automatic switching:

1.XXX (without decimal point): the smallest unit is 1Hz, in the range 1Hz ~ 999Hz;

2.X.XX (one hundred decimal point) is minimum unit 0.01Khz, ranging 1.00Khz ~ 9.99Khz;

3.XX.X (ten in decimal): minimum unit is 0.1kHz; range 10.0KHz ~ 99.9KHz

4.X.X.X (decimal in ten and one hundred): minimum unit is 1Khz; range 1KHz ~ 150KHz

e.g. frequency display: 100 indicates that the PWM output pulse of 100Hz;

1.01 represents the PWM output pulse 1.01K;

54.1 represents the PWM output pulse 54.1KHz;

1.2.4 indicates that the PWM output pulse of 124KHz;

Duty cycle in the range: 0 to 100%;

All setup parameters, power-down save.

 

 

Second, the parameter settings

Module has four separate buttons, to set the frequency and duty cycle, short press support (increase or decrease by one unit) and a long press (rapid increase or decrease), simple, setting all the parameters are automatically saved, non-volatile .

Third, the module parameters:

1. Working Voltage: 3.3 ~ 30V;

2. Frequency range: 1Hz ~ 150KHz;

3. The frequency accuracy: in each range accuracy is about 2%;

4. Load capacity signal: output current of about 5 ~ 30ma;

The output amplitude: PWM amplitude equal to the supply voltage;

6. Ambient temperature: -20 ~ + 70 °.

Fourth, the scope of application:

1. As square wave signal generator generating a square wave signal used for experimental development;

2. The square wave signal for generating the motor control driver;

3. adjustable pulse is generated for use by MCU;

4. The adjustable pulse is generated, the control-related circuit (PWM dimming control and other applications).

Fifth, the serial port control (MCU TTL level communications)
Communication Standard: 9600 bps Data bits: 8

Stop bits: 1
Parity bit: none
Flow control: none

1, the PWM frequency

“F101”: Set the frequency of 101 HZ (001 ~ 999)

“F1.05”: Set the frequency of 1.05 KHZ (1.00 ~ 9.99)

“F10.5”: Set the frequency 10.5KHZ (10.0 ~ 99.9)

“F1.0.5”: Set the frequency of 105KHZ (1.0.0 ~ 1.5.0)

2, the PWM duty ratio

“DXXX”: Set the PWM duty cycle is XXX; (001 ~ 100)

For example D050, set the PWM duty ratio is 50%

3, reads the set parameters

Send “read” string read parameter settings.

Setting successful return: DOWN;

Setting failback: FALL.