Dual Adjustable PWM Signal Generator with Display and Serial Interface

Technical Specifications

• Two PWM channels
• Supply voltage: 5 V - 30 V
• PWM Frequency: 1 Hz - 150 KHz
• Frequency Accuracy: 2%
• Output voltage: 5 V
• Two programming modes:
  • via the 3 buttons mounted on the module: "SET", "UP", "DOWN"
  • through serial communication
• Serial Configuration:
  • Baud rate: 9600 bps
  • Data bits: 8
  • Stop bits: 1
  • Parity bit: none
  • Flow control: none

Instructions for use

The first configuration method involves using the 3 buttons mounted on the PCB. The "SET" button plays the role of switching between the output channels as well as between the fill factor and the frequency.

To set the frequency of the signal, press the "SET" button until "FA1" (for the first channel) or "FA2" (for the second channel) appears.

The segment display has 3 frequency display modes:

1. XXX (without decimal point): the displayed frequency is between 1Hz - 999 Hz;
2. XX.X (with point for tens): the displayed frequency is between 0.1 KHz - 99.9 KHz;
3. XXX (all 3 points activated): The displayed frequency is between 1 KHz - 150 KHz;

To switch between these operating modes, you must hold the "SET" button and press the "UP" button.