1. Item 1
Highlights:
- 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.
NO Retail Box. Packed Safely in Bubble Bag.
Package Included:
- 1 x 2 way Independent PWM Generator
Module Highlights:
1.LCD display frequency and duty cycle, very clear, PWM output can be set to the frequency and duty cycle;
- Wide frequency range, high precision;
- 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:
- XXX (no decimal point): the smallest unit is 1Hz, the value range of 1Hz ~ 999Hz;
- X.XX (decimal point in the hundred) the smallest unit is 0.01Khz, the range of 1.00Khz ~ 9.99Khz;
- XX.X (decimal point in ten): the smallest unit is 0.1Khz; value range of 10.0KHz ~ 99.9KHz
- 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:
- Working voltage: 3.3 ~ 30V;
- Frequency range: 1Hz ~ 150KHz;
- Frequency accuracy: the accuracy in each range is about 2%;
- Signal load capacity: the output current can be about 5 ~ 30ma;
- Output amplitude: PWM amplitude equal to the supply voltage;
- Ambient temperature: -20 ~ +70 ℃.
Fourth, the scope of application:
- Used as a square wave signal generator, generate square wave signal for experimental development and use;
- Used to generate a square wave signal that controls the motor driver;
- generate adjustable pulse for MCU use;
- 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.