1. Item 1

 

 

Highlights:

  1. Two independent PWM generators can set the frequency, duty cycle;
  2. The wide frequency range, high accuracy;
  3. Can serial communication.

First, the module description：

Frequency is divided into three ranges:

  1. XXX (no decimal point): the smallest unit is 1Hz, the range 1Hz ~ 999Hz;
  2. XX.X (decimal point in ten): The minimum unit is 0.1Khz; the range of 0.1KHz ~ 99.9KHz
  3. X.X.X. (there are three decimal point): the smallest unit is 1Khz; the range 1KHz ~ 150KHz

Frequency display example:

"100" indicates that the PWM output pulse of 100Hz;

"54.1" indicates that the PWM output pulse of 54.1KHz;

"1.2.4." Indicates that the PWM pulse output 124KHz

Duty Cycle in the range: 0 to 100;

Three frequencies duty cycle is the same, all the parameters non-volatile.

Second, the module parameters:

  1. Working voltage: 5--30V, support micro USB 5.0V power supply;
  2. Frequency range: 1Hz ~ 150KHz;
  3. The frequency accuracy: ± 2%;
  4. Output Current: <30mA;
  5. Output amplitude: Default 5Vp-p (settable);
  6. Operating temperature range: -30 ~ + 70 ℃.

Third, the parameter settings：

Module has three buttons [Set], [Up], [Down];

  1. Press [Set] key to switch the display four parameters (FR1: PWM1 frequency; dU1: PWM1 duty cycle; FR2: frequency of PWM2; dU2: PWM2 duty cycle), before the handover parameters, there will be corresponding parameter name flash.
  2. Press [Up], [Down] keys to modify the current parameter value (long press can quickly add or subtract fast).
  3. Two PWM each have three preset frequency, the frequency display interface, long press [SET] key to switch between three types of frequencies, three kinds of frequency duty cycle is the same value. (XXX: range 1Hz ~ 999Hz; XX.X: range 0.1Khz ~ 99.9Khz; X.X.X .: range 1Khz ~ 150Khz,).

Fourth, the scope:

  1. As square wave signal generator which generates a square wave signal;
  2. to provide a signal to the stepping motor driver;
  3. Adjustable pulse generation for chip use;
  4. produce variable pulse signal, the control-related circuit (PWM dimming, speed).

Fifth, the serial control

Baud rate: 9600 bps

Data bits: 8

Stop bits: 1

Parity bit: none

Flow control: none

1, set the PWM frequency

"S1FXXXT": setting PWM1 frequency of XXX HZ (001 ~ 999)

"S1FXX.XT": set the frequency of PWM1 XX.X KHZ (00.1 ~ 99.9)

"S1F: X.X.X.T": setting PWM1 frequency of XXX KHZ (0.0.1 ~ 1.5.0..)

'S1': PWM1

'S2': PWM2

'F': Frequency

'D': Duty Cycle

'T' is the end flag

  1. Set the PWM duty cycle

"S1DXXXT": setting PWM1 duty cycle XXX; (001 ~ 100)

"S2DXXXT": set PWM2 duty cycle XXX; (001 ~ 100)

Setting successful return: DOWN;

Setting failback: FALL.

 

NO Retail Box. Packed Safely in Bubble Bag.

 

Package Included:

  • 1 x 2 way Independent PWM Generator
 
2.  Item 2
 

 

Module Highlights:

1.LCD display frequency and duty cycle, very clear, PWM output can be set to the frequency and duty cycle;

  1. Wide frequency range, high precision;
  2. Serial communication, TTL level

First, the module description

PWM output, you can set the frequency, duty cycle;

Frequency is divided into four ranges, automatic switching:

  1. XXX (no decimal point): the smallest unit is 1Hz, the value range of 1Hz ~ 999Hz;
  2. X.XX (decimal point in the hundred) the smallest unit is 0.01Khz, the range of 1.00Khz ~ 9.99Khz;
  3. XX.X (decimal point in ten): the smallest unit is 0.1Khz; value range of 10.0KHz ~ 99.9KHz
  4. X.X.X (decimal point in ten and hundred): the smallest unit is 1Khz; value range 1KHz ~ 150KHz

frequency display: 100 indicates PWM output 100Hz pulse;

              1.01 indicates PWM output 1.01K pulse;

54.1 indicates that the PWM output has a pulse of 54.1 kHz;

1.2.4 indicates that the PWM output is 124 kHz pulse;

Duty cycle range: 0 ~ 100%;

All set parameters, power-down automatically saved.

Second, the parameter settings

The module has four independent keys, used to set the frequency and duty cycle, support touch (increase or decrease a unit) and long press (fast increase or decrease), set the parameters automatically save, power down Not lost.

Third, the 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 about 5 ~ 30ma;
  5. Output amplitude: PWM amplitude equal to the supply voltage;
  6. Ambient temperature: -20 ~ +70 ℃.

Fourth, the scope of application:

  1. Used as a square wave signal generator, generate square wave signal for experimental development and use;
  2. Used to generate a square wave signal that controls the motor driver;
  3. generate adjustable pulse for MCU use;
  4. generate adjustable pulse, control the relevant circuit (PWM dimming speed and other applications).

5, serial control (single-chip TTL level communication)

 

Communication standard:

9600 bps Data bits: 8

Stop bit: 1

Check digit: none

Flow control: none

1, set the frequency of the PWM

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

"F1.05": set the frequency of 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 of 105KHZ (1.0.0 ~ 1.5.0)

2, set the PWM duty cycle

"DXXX": set the PWM duty cycle to XXX; (001 ~ 100)

Such as D050, set the PWM duty cycle is 50%

3, read the set parameters

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

 

Set successfully return: DOWN;

Setup failed to return: FALL.

 
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