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Signal Generator PWM Pulse Frequency Duty Cycle Adjustable Module LCD Display 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

5> . e. g. 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;

6> . Duty cycle range: 0 ~ 100%;

7> . All set parameters, power-down automatically saved.



Feature:

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

2> . Wide frequency range, high precision;

3> . Serial communication, TTL level



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.



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 ℃.



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.