2 Channel PWM Pulse Frequency Adjustable Duty Cycle Square Wave Rectangular Wave Signal Generator Module
This module generates square waves for experiment development with 2-channel PWM pulse frequency and adjustable duty cycle. It can be used to drive stepper motor drivers, generate adjustable pulses for MCU applications, and control related circuits with PWM (such as adjusting light speed).
Serial Port Control:
- Communication Standard:9600 bps
- Data Bit:8
- Stop Bit:1
- Verify Bit: none
- Flow Control: none
Setting PWM Frequency:
- “S1FXXXT”: set PWM1 frequency as XXX HZ (001~999)
- “S1FXX.XT”: set PWM1 frequency as XX.X KHZ (00.1~99.9)
- “S1F:X.X.X.T”: set PWM1 frequency as XXX KHZ (0.0.1.~1.5.0.)
- “S1”: PWM1
- “S2”: PWM2
- “F”: frequency
- “D”: duty cycle
- “T”: stop sign bit
Setting PWM Duty Cycle:
- “S1DXXXT”:set PWM1 duty cycle as XXX；(001~100)
- “S2DXXXT”:set PWM2 duty cycle as XXX；(001~100)
Setting successfully back: DOWN
Setting unsuccessfully back: FALL
Parameter Setting:
- The module has a 3-channel key: Set, Up, Down
- By short press SET key,can shift display 4 parameter values (FR1:PWM1 frequency;dU1:PWM1 duty cycle;FR2:PWM2 frequency;dU2:PWM2 duty cycle);before shifting,there will be corresponding parameter name flashing
- Directly press UP, DOWN key to modify the current parameter value
- 2-channel PWM is set 3 kinds frequency value, in frequency display interface, by long press SET to shift,3 kinds frequency’s duty cycle is the same （XXX:1Hz~999Hz; XX.X:0.1Khz~99.9Khz; X.X.X.:1Khz~150Khz).
Application Fields:
- As square wave generator to generate square wave for experiment development
- Used to drive steeping motor driver’s square wave
- Generate adjustable pulse for MCU using
- Generate adjustable pulse for controlling relative circuit (PWM adjust light speed etc)
Specification:
| Operating Voltage (VDC) | 5 to 30 |
|---|---|
| USB Type | Micro USB |
| Frequency Range | 1Hz to 150KHz |
| Frequency Precision | 2% |
| Operating Temperature Range (°C): | -30 to 60 |
| Signal Load Capacity | Output Current is within 8-30mA |
| Dimensions in mm (LxWxH) | 44x30x11 |
| Weight (g): | 8 |
| Shipping Weight | 0.012 kg |
| Shipping Dimensions | 6 × 4 × 3 cm |
Package Includes:
1 x 2 Channel PWM Pulse Frequency Adjustable Duty Cycle Square Wave Rectangular Wave Signal Generator Module.
2 Channel PWM Pulse Frequency Adjustable Duty Cycle Square Overview
This dual-channel PWM signal generator module produces stable square or rectangular wave outputs with user-defined frequency (1 Hz–150 kHz) and duty cycle. It’s ideal for driving stepper motor drivers, testing MCU PWM routines, LED dimming and general lab waveform generation.
Key Features of 2 Channel PWM Pulse Frequency Adjustable Duty Cycle Square
- Two independent PWM channels with frequency range from 1 Hz to 150 kHz and 2% precision
- Serial UART control at 9600 bps (8N1) for real-time frequency and duty cycle adjustments
- Wide power input: 5 V via micro-USB or 5–30 V external supply, default output 5 Vpp (adjustable by external voltage)
- Compact design supporting 8–30 mA output drive, suitable for low-power circuits
- Operating temperature from –30 °C to +70 °C for reliable performance in varied conditions
- Genuine product from Zbotic.in with fast shipping across India
Applications and Use Cases
- Driving stepper motor drivers with precise pulse inputs
- Generating test signals for MCU PWM peripheral development
- LED brightness control and lighting effects via adjustable duty cycle
- Frequency response testing of amplifiers, filters and audio circuits
- Educational labs and workshops demonstrating PWM principles
How to Use 2 Channel PWM Pulse Frequency Adjustable Duty Cycle Square
Power the module via its micro-USB port (5 V) or a 5–30 V external input, then connect the UART pins to your host (e.g., PC USB-to-TTL adapter or MCU) at 9600 bps, 8N1. Send commands like “S1F050T” to set PWM1 to 50 Hz or “S2D075T” for 75% duty on channel 2. Wire the PWM outputs to your circuit and adjust parameters in real time through the serial interface.
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Frequently Asked Questions
Can I power the module with both USB and an external supply?
Use either the micro-USB 5 V input or a 5–30 V external supply on the VIN pin, but avoid applying both simultaneously to prevent voltage conflicts and potential damage.
How do I change the PWM frequency and duty cycle?
Connect via UART at 9600 bps, 8N1. Send commands like “S1F100T” for 100 Hz on PWM1 or “S2D050T” for 50% duty on PWM2. Replace “1”/“2” to select channels, “F” for frequency and “D” for duty cycle with values in the specified ranges.
What is the maximum output current and voltage range?
The module can drive loads drawing 8–30 mA per channel. Output amplitude defaults to 5 Vpp, but you may increase it up to your supply voltage when using an external power source up to 30 V.
Technical Specifications
| Channels | 2-channel |
|---|---|
| Interface / Protocol | BLE |
| SKU | AI2752 |
| Weight | 0.00824 kg |
| Availability | In Stock |
Applications & Use Cases
The 2 Channel PWM Pulse Frequency Adjustable Duty Cycle Square Wave Rectangular Wave Signal Generator Module is a versatile signal generator module & oscilloscopes used across a wide range of applications including electronics projects, DIY builds, prototyping, and educational experiments.
Common use cases:
- Integrating into a custom electronics project
- Learning and experimenting with circuits
- Replacing or upgrading components in existing setups
This product is ideal for electronics enthusiasts, engineers, and students.
Technical Tip: Always verify voltage and current requirements before connecting to your circuit. Check datasheets for detailed specifications and pin configurations.
Shipping & Delivery
- Free shipping on orders above ₹999 across India
- Dispatched within 1-3 business days
- Expected delivery: 3-7 business days depending on location
- Secure packaging to ensure safe transit of electronic components
