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

Features:

• Support Serial operation

• Wide frequency range,high precision

• LCD can display frequency and duty datio,Easy to oprate

• Output of three-channel PWM at the same time, Adjustable frequency,3-channel frequency output consistent,duty ratio can be independently adjusted,suitable for most occasions

Parameters:

• Operating voltage: 3.3~30V;

• Frequency range: 1Hz~150KHz;

• Frequency accuracy: In each range of accuracy is about 2%

• Signal load capacity: Output current can be around 5~30ma

• Output amplitude: PWM amplitude and supply voltage equal 

• Ambient temperature: -20~+70°

Frequency is divided into four areas,automatic switching:

• 1.XXX(No decimal point): 1HZ Stepping Unit,Range:1Hz~999Hz;

• 2.X.XX(The decimal is in the hundreds place):0.01KHZ Stepping Unit,Range: 1.00Khz~9.99Khz;

• 3.X.XX(The decimal is in the tens place):0.1KHZ Stepping Unit,Range: 10.0Khz~99.9Khz;

• 4.X.X.X(The decimal is in the ones place):1KHZ Stepping Unit,Range: 1Khz~150Khz;

• e.g. ,frequency display:100 represent the pulse of 100Hz ;

• 1.01 represent the pulse of 1.01KHz; 

• 54.1 represent the pulse of 54.1KHz

• 1.2.4 represent the pulse of 124Hz

Application:

• Used as square wave signal generator to generate square wave signal for experiment development and use

• Used to generate a square wave signal to control the motor driver;

• Generating adjustable pulses for MCU use;

• Generate adjustable pulse, control related circuit (PWM dimming speed and other applications).

UART Serial command:

• Baud rate: 9600 bps Data length:8

• Stop bits:1

• Check digit: none

• Flow control: none

1.set the frequency of the PWM 

• "F101": Set frequency of 101 HZ (001~999)

• "F1.05": Set frequency of 1.05 KHZ(1.00~9.99)

• "F10.5": Set frequency of 10.5KHZ(10.0~99.9)

• "F1.0.5":Set frequency of 105KHZ(1.0.0~1.5.0)

2.set the duty ratio of PWM

• "DX:YYY": Set PWM duty ratio x: (1~3) PWM serial number,YYY: (000~100) duty ratio;

• For example d1:050,set 1th PWM duty ratio to 50%

• 3.Read Setup parameters

• Send a "read" string to read the parameters of the setting.

• Message format:F156,D1:052,D2:059,D3:058,

• Set successful return:DOWN

• Set failed to return:FALL