PWM Square Wave Signal Generator โมดูลกำเนิดความถี่

โมดูลกำเนิดความถี่ สามารถให้กำเนิดความถี่ square wave 1Hz – 150 KHz 
ตั้งค่าความถี่ เเละ Duty ได้ทั้งจากการกดปุ่ม และ Serial Port

PWM Square Wave Signal Generator W/ Adjustable Frequency and Duty Cycle

This device is capable of generating square wave signal for experimental development that involves PWM dimming and speed controlling (e.g. motor drivers) as well as other micro controller use. It can be controlled via the Serial Protocol TTL (TXD & RXD pins). It is stable and reliable, and fairly simple to use. 

Specification 

• Operating Voltage: 3.3 - 30 VDC
• Frequency Range: 1Hz – 150 KHz
• Frequency Accuracy: the accuracy in each range is about 2%
• Signal Load Capacity: 5 - 30 mA
• Output Amplitude: PWM Amplitude Equal to the Supply Voltage
• Operating Temperature: -20 - +70 Celsius
• Dimensions: 52 x 32 x 10 mm  

Communication Standard: 

• 9600 bps Data bits: 8
• Stop bit: 1
• Check digit: none
• Flow control: none 

Serial Communication

• 1) Setting the frequency of the PWM: 
       Command "F101": Set the frequency to 101 HZ (001 to 999) 
       Command "F1.05": set the frequency of 1.05 KHZ (1.00 ~ 9.99) 
       Command "F10.5": Set the frequency to 10.5KHZ (10.0 ~ 99.9) 
       Command "F1.0.5": set the frequency of 105KHZ (1.0.0 ~ 1.5.0)
• 2) Setting the PWM duty cycle: 
       DXXX": set the PWM duty cycle to XXX; (001 ~ 100) 
       Example: “D050”, sets the PWM duty cycle is 50%
• 3) Read the set parameter 
       Send a "read" string to read the set parameters. 
       Set successfully return: DOWN. 
       Setup failed to return: FALL.