XY-LPWM 3-Channel PWM Signal Generator Module | LCD & UART

Description

XY-LPWM 3-Channel PWM Signal Generator Module (1Hz-150kHz, Adjustable Duty Cycle, LCD, UART)

This versatile XY-LPWM module generates up to three channels of PWM (Pulse Width Modulation) signals simultaneously. It features a wide adjustable frequency range (common to all channels) and independent duty cycle control for each channel, making it suitable for a wide variety of applications including motor control, LED dimming, and signal generation for development and testing. Configuration is easy via on-board buttons with LCD feedback, or through serial UART commands.

Key Features:

• Triple PWM Output: Generates three PWM channels concurrently.

• Shared Adjustable Frequency: Set a single frequency (1Hz to 150kHz) for all three output channels.

• Independent Duty Cycle Control: Adjust the duty cycle (0-100%) individually for each of the three channels.

• Clear LCD Display: Shows the set frequency and the currently selected channel’s duty cycle.

• Easy Button Operation: Use on-board keys for setting frequency and duty cycles (short press for unit steps, long press for rapid change).

• Automatic Range Switching: Frequency setting automatically adjusts stepping units across four ranges for precise control.

• Serial (UART) Control: Remotely set frequency and duty cycles via UART commands (9600 baud).

• Non-Volatile Memory: Automatically saves all settings upon power loss.

• Wide Operating Voltage: Compatible with 3.3V to 30V power supplies.

Operation:

• On-Board Control: Use dedicated buttons to set the shared frequency. Press individual duty cycle buttons (D1, D2, D3) to select a channel and adjust its duty cycle (0-100%). The LCD updates in real-time to show the settings for the last adjusted channel.

• Serial Control (UART Settings: 9600 bps, 8 data bits, 1 stop bit, no parity, no flow control):

  • Set Frequency:

    • F<Hz>: e.g., F101 sets 101Hz (Range 001-999 Hz)

    • F<kHz>.: e.g., F1.05 sets 1.05kHz (Range 1.00-9.99 kHz)

    • F<kHz>: e.g., F10.5 sets 10.5kHz (Range 10.0-99.9 kHz)

    • F<kHz>.: e.g., F1.0.5 sets 105kHz (Range 1.0.0-1.5.0 kHz) (Note: Original notation seems slightly inconsistent, verify exact command format if possible)

  • Set Duty Cycle:

    • Dx:YYY: e.g., D1:050 sets Channel 1 duty cycle to 50%. (x = channel 1-3, YYY = duty cycle 000-100)

  • Read Parameters:

    • Send “read” string.

    • Module returns current settings (e.g., F156,D1:052,D2:059,D3:058,)

  • Confirmation: Returns DOWN on success, FALL on failure.

Frequency Ranges & Display:

Technical Specifications:

• Operating Voltage: 3.3V ~ 30V DC

• Frequency Range: 1Hz ~ 150KHz

• Frequency Accuracy: Approx. ±2% within each range

• Duty Cycle Range: 0% ~ 100% (Independently adjustable per channel)

• Signal Load Capacity: Output current approx. 5mA ~ 30mA per channel

• Output Amplitude: Equal to the input supply voltage (VCC)

• Operating Temperature: -20°C ~ +70°C

• Control: On-board buttons, UART (9600 baud)

Applications:

• Square wave signal generator for experimental development.

• Generating control signals for motor drivers.

• Creating adjustable pulses for microcontroller interfacing.

• PWM control for LED dimming, speed control, etc.

• Driving small loads directly within current limits.

Package Includes:

• 1 x XY-LPWM 3-Channel PWM Signal Generator Module