Micro USB 2 Channel Adjustable PWM Signal Generator Duty Cycle Pulse Frequency Module Dual Way Digital LED Display DC 5V 12V 24V

Two independent PWM generators can set the frequency, duty cycle;

The wide frequency range, high accuracy;

Can serial communication.

First, the module description:

 
Frequency is divided into three ranges:
 
XXX (no decimal point): the smallest unit is 1Hz, the range 1Hz ~ 999Hz;
XX.X (decimal point in ten): The minimum unit is 0.1Khz; the range of 0.1KHz ~ 99.9KHz
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:
 
Working voltage: 5--30V, support micro USB 5.0V power supply;
Frequency range: 1Hz ~ 150KHz;
The frequency accuracy: ± 2%;
Output Current: <30mA;
Output amplitude: Default 5Vp-p (settable);
Operating temperature range: -30 ~ + 70 °.
Third, the parameter settings:
 
Module has three buttons [Set], [Up], [Down];
 
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.
Press [Up], [Down] keys to modify the current parameter value (long press can quickly add or subtract fast).
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:
 
As square wave signal generator which generates a square wave signal;
to provide a signal to the stepping motor driver;
Adjustable pulse generation for chip use;
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
 
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.