2-Channel 5V PWM Pulse / Square Wave Generator Module 1Hz-150KHz Frequency

2-Channel 5V PWM Pulse/Square Wave Generator. Two independent outputs -- each with its own frequency (1Hz–150KHz) and duty cycle (1–100%). 3-button LED display control. RS-232 serial interface for computer/MCU control (9600 bps). Up to 30mA per channel. P/N EM-OTHER-0010.

KEY SPECS: Supply 5–30V (MicroUSB or pads) | Freq 1Hz–150KHz | Precision ±2% | Duty 1–100% | Output 5V default (adjustable) | 30mA/ch max | -30 to 70°C.

IMPORTANT: Output pads require soldering -- no plug-in terminals included. Two firmware versions ship with this module; both cover full 1Hz–150KHz range with identical specs. Full instructions for both versions at: support.envistiamall.com

Ships from the USA. Fast handling. Envistia Mall -- Responsive Customer Support & Hassle-Free Returns.

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2-Channel 5V PWM Pulse / Square Wave Generator Module 1Hz-150KHz Frequency

 

2-Channel 5V PWM Pulse/Square Wave Generator. Two independent outputs -- each with its own frequency (1Hz–150KHz) and duty cycle (1–100%). 3-button LED display control. RS-232 serial interface for computer/MCU control (9600 bps). Up to 30mA per channel. P/N EM-OTHER-0010.

KEY SPECS: Supply 5–30V (MicroUSB or pads) | Freq 1Hz–150KHz | Precision ±2% | Duty 1–100% | Output 5V default (adjustable) | 30mA/ch max | -30 to 70°C.

IMPORTANT: Output pads require soldering -- no plug-in terminals included. Two firmware versions ship with this module; both cover full 1Hz–150KHz range with identical specs. Full instructions for both versions at: support.envistiamall.com

Ships from the USA. Fast handling. Envistia Mall -- Responsive Customer Support & Hassle-Free Returns.

2-Channel 5V PWM Pulse / Square Wave Generator Module -- 1Hz to 150KHz, Independent Frequency & Duty Cycle Control

This compact 2-channel PWM pulse and square wave generator gives you two fully independent signal outputs, each with its own adjustable frequency and duty cycle. A simple 3-button interface and LED display let you set exactly the signal you need without a computer or microcontroller. When automation is required, the built-in RS-232 serial interface lets you control both channels programmatically. Power it from any MicroUSB charger, USB power bank, or an external DC supply up to 30V.

⭐ Key Features

• Two fully independent PWM output channels -- different frequency and duty cycle on each
• Wide frequency range: 1Hz to 150KHz
• Adjustable duty cycle: 1% to 100% in 1% steps
• Intuitive 3-button control (SET, UP, DOWN) with 3-digit LED display
• RS-232 serial interface for computer or microcontroller control (9600 bps, 8N1)
• MicroUSB 5V power input -- works with any USB charger or power bank
• Wide supply range: 5V – 30V via onboard pads
• Up to 30mA output current per channel
• Output voltage adjustable via external supply (requires one-time trace cut)
• Settings saved to memory -- restores last-used frequency and duty cycle at power-on
• Operating temperature: −30°C to 70°C

📊 SpecificationsParameterValueNumber of Channels2 (fully independent)Supply Voltage5V – 30V DC (MicroUSB or VCC/GND pads)Frequency Range1Hz – 150KHzFrequency Precision±2%Duty Cycle Range1% – 100% (1% steps)Output Voltage (default)Equals supply voltage (nominally 5V peak-to-peak from USB)Output Voltage (adjustable)5V – 30V with external supply and PCB trace cutMax Output Current30mA per channelControl InterfaceSET / UP / DOWN buttons + 3-digit LED displaySerial InterfaceRS-232, 9600 bps, 8N1, no flow controlPower InputMicroUSB (5V) or VCC/GND solder padsOperating Temperature−30°C to 70°CPart NumberEM-OTHER-0010📌 Connections & Pinout

All signal and power connections are made via solder pads on the board. The MicroUSB port is the simplest way to power the module at input5V -- connect to any USB charger, power bank, or computer USB portVCCPower padDC positive supply, 5V – 30V. Alternative to MicroUSB.GNDGround padCommon ground -- share with the ground of your connected circuitCH1 / OUT1Signal output padPWM Channel 1 square wave outputCH2 / OUT2Signal output padPWM Channel 2 square wave outputBack-side padsExternal voltage inputUsed to set output signal voltage independently from supply voltage⚠️ Soldering Required: Output signal connections (CH1, CH2) require soldering wires directly to the pads on the board. No plug-in terminals or connectors are included. A soldering iron is needed to wire the module into your circuit.🔧 Button Operation

The module has three buttons -- SET, UP, and DOWN. Short-pressing SET cycles through the four parameters: CH1 Frequency → CH1 Duty Cycle → CH2 Frequency → CH2 Duty Cycle. Once a parameter is selected, UP and DOWN change its value. Duty cycle adjusts from 1% to 100% in 1% steps.

Frequency is entered in one of three display ranges. The decimal point position on the display indicates the active range:

Display FormatFrequency RangeExampleXXX (no decimal)1Hz – 999Hz050 = 50HzXX.X or X.XX100Hz – 99.9KHz01.2 = 1.2KHzX.X.X. or XXX.1KHz – 150KHz1.0.0. = 100KHzℹ️ Two Firmware Versions: This module is produced by more than one manufacturer and may ship with one of two firmware versions. Both versions cover the same full frequency range and specifications. If the display shows FR1 or FA1 at power-on, follow the FR/FA button instructions. If it shows a plain number, follow the PA version instructions. Complete step-by-step instructions for both versions are available on our support website -- see the link below.💻 RS-232 Serial Control

Both channels can be programmed via RS-232 ASCII commands at 9600 bps, 8N1, no flow control. Commands follow the format below, where S1 or S2 selects the channel, F sets frequency, D sets duty cycle, and T terminates the command. The module responds with DOWN on success or FALL on CH1 frequency in Hz (001–999)S1F050T → 50HzS1FXX.XTSet CH1 frequency in KHz (00.1–99.9)S1F01.5T → 1.5KHzS1FX.X.X.TSet CH1 frequency in KHz (0.0.1.–1.5.0.)S1F1.0.0.T → 100KHzS2F...TSame frequency formats for Channel 2S2F500T → 500HzS1DXXXTSet CH1 duty cycle % (001–100)S1D050T → 50%S2DXXXTSet CH2 duty cycle % (001–100)S2D025T → 25%⚠️ Logic Level Warning: The RS-232 interface operates at 5V logic. Use a logic level converter when connecting to 3.3V devices (ESP32, Raspberry Pi, Arduino 3.3V boards) to avoid damage.🎯 Applications

• Stepper Motor Control -- supply step-pulse signals to A4988, DRV8825, or TMC2209 driver boards; adjust speed by changing frequency
• LED Dimming -- PWM-control brightness through a MOSFET driver stage
• Microcontroller Testing -- generate test signals for GPIO inputs during development without writing any code
• Bench Signal Generator -- quick square wave source for timing circuits, relay testing, and frequency verification
• Servo Motor Testing -- drive RC servos at 50Hz with variable duty cycle
• Automotive ECM Testing -- simulate RPM and vehicle speed sensor signals for bench diagnostics
• Electronics Education -- demonstrate PWM, duty cycle, and square wave generation concepts hands-on

📦 What\'s in the Box

• 1× 2-Channel 5V PWM Pulse / Square Wave Generator Module

Connecting wires, MicroUSB cable, and power supply are not included.

📋 Resources

Full button operation instructions for both firmware versions, RS-232 command reference, wiring guidance, and troubleshooting tips are available at the Envistia Mall support website.

🏪 About Envistia Mall

Envistia Mall is a US-based electronics retailer specializing in development boards, sensors, modules, and components for makers, engineers, and educators. We ship from the United States with fast handling times. Product documentation and technical support are available at our dedicated support site.

📦 Fast Free US Shipping | 🔄 Hassle-Free Returns | 📧 Responsive Customer Support

Visit our store for stepper motor driver boards, Arduino and ESP32 modules, breadboards, jumper wires, power supplies, and other electronic components and maker accessories.

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