PWM Generator Module Highlights:
>> 2-channel independent PWM output, frequency and duty cycle adjustable.
>> High accuracy, wide frequency range.
>> Serial ports communication is available.

PWM Generator Applications:
>> Square wave signal generator to output square wave signal.
>> Used as deriving module to control stepping motor.
>> Output adjustable pulse for MCU.
>> Output adjustable pulse to control PWM circuit or adjust light and speed.

PWM Generator Parameters:
1. Operating Voltage: 5-30VDC, support micro USB 5.0V power supply.
2. Frequency range: 1Hz-150KHz.
3. Frequency accuracy: about 2% in each frequency range.
4. Signal load capacity: output current is in 8-30mA.
5. Output amplitude: default 5V Vp-p (can be changed by adding external power supply).
6. Operating temperature range: -30~+70℃.

7. 3-type frequency range:
A. XXX (No decimal point): the min. unit is 1Hz, value range: 1Hz-999Hz.
B. XX.X (Decimal point in tens position): the min. unit is 0.1kHz, value range: 0.1KHz-99.9KHz.
C. X.X.X. (Decimal point in each digit): the min. unit is 1kHz, vaule range: 1KHz-150KHz.
E.g.: LED Display 100 indicates PWM output pulse 100Hz.
LED Display 54.1 indicates PWM output pulse 54.1KHz.
LED Display 1.2.4 indicates PWM output pulse 124KHz.

8. Value range of duty cycle: 0-100 . The three types of frequency value range are in the same duty cycle. All the settings is saved in power off state.

PWM Generator Parameters Setting:
1. Short press【Set】button, switch four parameters displayed: FR1: PWM1 Frequency, dU1: PWM1 duty cycle; FR2: PWM2 Frequency, dU2: PWM2 duty cycle. The LED flashing before setting it.
2. Press 【Up】,【Down】Buttons to revise the current value.
3. 2-channel PWM signal output, 3-type frequency range preset in the same duty cycle: Long press 【SET】button to switch the frequency range: XXX: Range 1Hz-999Hz; XX.X: Range 0.1Khz~99.9Khz; X.X.X: Range 1KHz-150KHz.

PWM Generator Serial Ports Control:
>> Communication standard: 9600bps.
>> Data bit: 8
>> Stop bit: 1
>> Check-sum bit: None
>> Stream control: None

PWM Generator Frequency & Duty Cycle Setting:
1. Set PWM Frequency:
“S1FXXXT”: Set PWM1 frequency into XXX HZ (001-999)
“S1FXX.XT”: Set PWM1 frequency into XX.X KHZ (00.1-99.9)
“S1F:X.X.X.T”: Set PWM1 frequency into XXX KHZ (0.0.1.-1.5.0.)
‘S1’: PWM1
‘S2’: PWM2
‘F’ : Frequency
‘D’ : Duty cycle
‘T’ : Stop bit indication

2. Set PWM Duty Cycle:
“S1DXXXT”: Set PWM1 duty cycle into XXX: (001-100)
“S2DXXXT”: Set PWM2 duty cycle into XXX: (001-100)
Setting successful, return: DOWN
Setting failed, return: FALL