2 Channel PWM Signal Generator Module

2 Channel PWM Signal Generator Module

It is a 2-output card that can produce adjustable PWM signals with a frequency of 1Hz-150kHz and a duty cycle range of 0%-100%. The duty cycle and frequency of each output are adjusted with the buttons on the board. It can be powered by a DC power source in the 5-30V range or via the micro USB on it. It has high frequency accuracy. It can communicate serially with the RXD and TXD outputs on the card.

It is a product that will make your projects easier. For example, it can be used in test studies as a square wave generator, or you can use it in stepper motor control by sending signals to a motor driver. 

How to Adjust PWM Signal?

There are 3 buttons on the card: "SET", "UP" and "DOWN" respectively. When you press the “SET” button briefly, it shows the options where you can change the settings of a total of 4 parameters. These are FR1(PWM1 Frequency), dU1(PWM1 Duty Cycle), FR2(PWM2 Frequency) and dU2(PWM2 Duty Cycle) settings respectively. You need to select the parameter you want to set with the [SET] button. You can then change the value of the parameter you selected using the [UP] and [DOWN] buttons. There are 3 different frequency ranges for adjustment. (AAA:1Hz-999Hz, AA.A: 0.1 kHz – 99.9 kHz, A.A.A: 1kHz – 150 kHz) You need to press and hold the [SET] button to change the frequency range. (If it does not accept the value A, write X instead of A)

Serial Communication Parameters:

• Baud Rate: 9600
• Data bits: 8
• Stop bits: 1 
• Parity bit: none
• Flow control: none

PWM Frequency Setting Commands:

• “S1FAAAT”: Set PWM1 frequency to AAA Hz(001-999)
• "S1FAA.AT":Set PWM1 frequency as AA.A kHz(00.1-99.9)
• "S1F:A.A.A.T":Set PWM1 frequency to AAA kHz(0.0.1-1.5.0)
• “S1”: PWM1
• “S2”: PWM2
• “F”: Frequency
• “D”: Duty Cycle
• “T”: End Sign Bit

PWM Duty Cycle Commands:

• "S1DAAAT": Set PWM1 duty cycle to AAA(001 – 100)
• "S2DAAAT": Set PWM2 duty cycle to AAA(001 – 100)
• To save the settings and exit: DOWN
• To exit without saving settings: FALL

Technical specifications:

• Working Voltage: 5-30V
• Possibility of powering via Micro USB
• 2 independent PWM signals that you can adjust the duty cycle and frequency
• Frequency Range: 1Hz-150kHz
• Frequency Consistency: ± 2%
• Duty Cycle: 0% - 100%
• Output Amplitude: 5V p-p (default) – adjustable
• Output Current: 8-30mA
• Operating Temperature: -30℃- 70℃
• Size: 41 x 28mm
• Thickness: 1.6mm