2 Channel PWM Signal Genenrator

Feature:
Two independent PWM generators can control the frequency, duty cycle
The wide frequency range, high accuracy
Can serial communication

First, the module description:
Frequency is divided into three series:
XXX (no comma): the smallest unit is 1Hz, the range 1Hz -999Hz
XX. X (comma in ten): The minimum unit is 0.1 Khz; the range of 0.1 KHz -99.9 KHz
X.X.X. (there are three commas): the smallest unit is 1 Khz; the range 1 KHz -150 KHz

Frequency display example:
"100" indicates that the PWM output pulse is 100Hz
"54.1" indicates the PWM output pulse of 54.1 KHz
"1.2.4." Indicates that the PWM pulse output is 124 KHz
Duty Cycle in the range: 0 to 100
Three frequency duty cycle is the same, all parameters non-volatile.

Parameter:
Working voltage: 5--30V, support micro USB 5.0 V power supply
Frequency range: 1Hz -150 KHz
The frequency accuracy: ± 2%
Output current: <30mA
Output amplitude: Standard 5Vp-p (adjustable)
Temperature: -30 -70 ° C

Third, the parameter settings:
Module has three buttons [Set], [Up], [Down]
Press [Set] key to display four parameters (FR1: PWM1 frequency; dU1: PWM1 duty cycle; FR2: frequency of PWM2; dU2: PWM2 duty cycle), before the transfer parameters, there will be corresponding parameter name flash.
Press [Up], [Down] keys to set 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 types of frequency duty cycle is the same value. (XXX: range 1Hz -999Hz; XX.x: range 0.1 Khz -99.9 Khz; X.X.X .: range 1 Khz -150 Khz,).

Fourth, the scope:
As a square wave signal generator that generates a square wave signal;
To send a signal to the stepper motor driver;
Adjustable pulse generation for chip use;
Produce variable pulse signal, the control-related circuit (PWM dimming, speed).
Fifth, the serial
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": the frequency of PWM1 XX. X KHZ (00.1 -99.9)
"S1F: X.X.X.T": PWM1 frequency setting 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)
Successful return setting: DOWN;
Failback setting: FALL.

1 Channel Signal Generator PWM Pulse Frequency Duty Cycle Adjustable Module LCD Display 1Hz-150Khz 3.3V-30V PWM Board Module

3 Channel PWM Signal Generator

Description:
WM output, wide frequency range, duty cycle adjustable independently
frequency is divided into four series, automatic switching
1. XXX (no comma): The minimum unit is 1Hz, the value range is 1Hz -999Hz
2. X. XX (the comma is in the hundred places) is 0.01 Khz, the value range is 1.00 Khz -9.99 Khz
3, XX. X (comma in ten): The minimum unit is 0.1 Khz: Value range 10.0 KHz -999 KHz
4. X.X.X (comma is in ten and hundred place): the minimum unit is 1 Khz: the value range is 1 KHz -150 KHz

Frequency display:
100 gives PWM output 100Hz pulse
101 gives PWM output 1.01 K pulse
54.1 gives PWM output 54.1 KHz pulse
1.2.4 gives PWM output pulse of 124 KHz
Duty cycle values range from 0 to 100%, where 100% is expressed in A%.
all setting parameters, save power off

Feature:
LCD display frequency and duty cycle, very clear, PWM output can be set to control frequency and duty cycle
wide frequency range, high precision
serial communication, TTL level

Parameters:
operating voltage: 3.3 -30 V.
frequency range: 1Hz -150 KHz
frequency accuracy: the accuracy in each range is about 2%
signal charging power: the output current can be about 5 -30mA
Output amplitude: PWM amplitude equal to the supply voltage
ambient temperature: -20 -70 ℃.

Application:
used as a square wave generator, generate square wave signal for experimental development and use
uses generate a square wave that controls the motor driver
generate adjustable pulse for MCU use
generate adjustable pulse, control the relevant circuit (PWM dimming speed and other applications)
serial control (single-chip TTL level communication)

Communication standard:
9600 bps Data bits: 8
Stop bit: 1
check digit: none
Flow control: none

Frequency of the PWM
"F101": Set the frequency 101 HZ (001 -999)
"F1.05": set the frequency of 1.05 KHZ (1.00 -9.99)
"F10.5": Set the frequency to 10.5 KHZ (10.0 -99.9)
"F1.0.5": set the frequency of 105 KHZ (1.0.0 -1.5.0)

Set the PWM duty cycle
"DXXX": set the PWM duty cycle to XXX; (001 -100)
like D050, set the PWM duty cycle is 50%

Read the set of parameters
send a "read" string to read the set parameters.
Set success return: DOWN;
Setup failed return: FALL.