---
product_id: 139267900
title: "PWM Frequency Generator, 1-Channel 1Hz-150KHz Adjustable Pulse Duty Cycle Function Generator, Square Wave Signal Generator Module with LCD Display and Rotary Switch"
brand: "mioyoow"
price: "₩48532"
currency: KRW
in_stock: true
reviews_count: 9
category: "Mi Oyoow"
url: https://www.desertcart.kr/products/139267900-pwm-frequency-generator-1-channel-1hz-150khz-adjustable-pulse-duty
store_origin: KR
region: South Korea
---

# Clear LCD frequency & duty cycle display Power-down memory & knob lock 1Hz-150KHz frequency range PWM Frequency Generator, 1-Channel 1Hz-150KHz Adjustable Pulse Duty Cycle Function Generator, Square Wave Signal Generator Module with LCD Display and Rotary Switch

**Brand:** mioyoow
**Price:** ₩48532
**Availability:** ✅ In Stock

## Summary

> ⚡ Unlock precision PWM control and never miss a beat in your projects!

## Quick Answers

- **What is this?** PWM Frequency Generator, 1-Channel 1Hz-150KHz Adjustable Pulse Duty Cycle Function Generator, Square Wave Signal Generator Module with LCD Display and Rotary Switch by mioyoow
- **How much does it cost?** ₩48532 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/139267900-pwm-frequency-generator-1-channel-1hz-150khz-adjustable-pulse-duty)

## Best For

- mioyoow enthusiasts

## Why This Product

- Trusted mioyoow brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dual Mode Flexibility:** Switch effortlessly between frequency and duty cycle adjustments, plus UART support for advanced control.
- • **Crystal-Clear LCD Display:** Instantly view both frequency and duty cycle on a high-definition screen, eliminating guesswork.
- • **Smart Memory & Safety Lock:** Never lose your settings with power-down memory and prevent accidental changes with the knob lock feature.
- • **Versatile Industrial & DIY Use:** Perfect for motor drivers, MCU dimmers, speed governors, and experimental prototyping—engineered for professionals and makers alike.
- • **Precision Control at Your Fingertips:** Adjust frequency from 1Hz up to 150KHz with ultra-responsive rotary knob for seamless tuning.

## Overview

The 1Hz-150KHz PWM Signal Generator is a compact, single-channel device designed for precise pulse width modulation with a wide frequency range. Featuring a bright LCD for real-time frequency and duty cycle display, dual adjustment modes, UART support, and power-down memory, it ensures stable, repeatable output ideal for motor control, dimmers, and prototyping. Its lockable knob and durable shell make it a reliable tool for engineers, hobbyists, and professionals seeking high performance and ease of use.

## Description

Buy MiOYOOW PWM Frequency Generator, 1-Channel 1Hz-150KHz Adjustable Pulse Duty Cycle Function Generator, Square Wave Signal Generator Module with LCD Display and Rotary Switch: Function Generators - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Controllable Pump frequency and duty cycle. Must have! Worth every penny and probably under priced. - This is a decent product for control of brushless motors and water pumps. My case is a Pierberg CWA-400 and this works flawlessly. There is another similar controller on desertcart but watch out as it does not have selectable frequency as this model does have full range of duty cycle and frequency. Pierburg pumps like 50-150hz and 95% duty cycle is 100% motor speed. If you set for 100%, the logic in the pump will allow for 90% pump speed. Just FYI, this is stated in the water pump manual/data sheet and test in my lab and in my car. 5 stars as it does what it claims and the internal clock is really close as verified by my rubidium standard.
Review: Perfect for students, electronic hobbyists, makers and DIY enthusiasts! - This signal generator is a small, easy-to-use stand-alone panel-meter-size device intended for a circuit design and prototyping bench or testing environment. Its overall build quality and high performance-to-cost ratio make it ideal for students, electronic hobbyists, makers and DIY enthusiasts. It can be used as-is or it can be easily mounted in a larger panel. It only draws a few tens of milliamps so it can be powered by almost any available DC supply from 3.3V to 30V. There is no provision for controlling output amplitude but an external potentiometer can be easily added to do this. The output source resistance is about 1 kilohm and the output waveform swings to within a few millivolts of the power supply rails. This makes it very easy to drive associated logic. Settings are remarkably stable with changes in power supply voltage over the full range, from 3.3V to 30V. A front panel button conveniently enables and disables the generator output during prototyping and testing. The LCD is bright and easy to read. It provides accurate display of operating frequency and duty cycle. A single front panel knob provides for fast setup of both frequency and duty cycle. There appears to be a serial interface that can also be used to set these values, but the rudimentary documentation and lack of headers on the printed circuit board prevent me from testing this functionality. There are two different operating modes, Normal and Precise. The Precise mode offers better duty cycle granularity over a narrower range of frequencies. A very important feature of this unit is its ability to preserve frequency and duty cycle settings after power cycling. Whatever the settings are prior to power being removed will be restored when power is re-applied. In addition, the settings are lockable, making it easier to keep your associated circuitry safe from unintentional changes. One feature I find particularly useful is the ability to set upper and lower limits for duty cycle. My video demonstrates use of this generator’s programmable lower and upper duty cycle limits to control a small RC Servo through 180 degrees of rotation. A single 18650 Li-Ion cell could power this setup for days without recharging.

## Features

- 1. It's 1-channel PWM output signals. The Adjustable Frequency Range: from 1Hz to 150KHz. Please Note: 1Hz is the limit value. It is relatively large to receive external interference, such as wires or wireless or high temperature, so the fluctuation will be relatively large. It is recommended to use an output above 1Hz.
- 2. Shell Protection and Clear LCD high definition Display: Display both Frequency and Duty Cycle in more clear status. High precision detection.
- 3. Dual Work Mode. Support both Frequency Adjustment and Duty Cycle Adjustment. Support UART. Support enable output.
- 4. Support power-down memory function: no need to set the data after power-off. Knob supports lock function to avoid misoperation.
- 5. Wider Application: Square wave signal generator, generating square wave signal for experimental development, generating square wave signal that controls the motor driver, and generating adjustable pulses for MCU Dimmer; Dimmer; Speed governor, and so on.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07NJ1SL3N |
| Best Sellers Rank | #115,604 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #51 in Function Generators |
| Date First Available | March 19, 2019 |
| Item Weight | 1.44 ounces |
| Item model number | 6543816669 |
| Manufacturer | WHDTS |
| Package Dimensions | 3.8 x 3.1 x 1.8 inches |

## Images

![PWM Frequency Generator, 1-Channel 1Hz-150KHz Adjustable Pulse Duty Cycle Function Generator, Square Wave Signal Generator Module with LCD Display and Rotary Switch - Image 1](https://m.media-amazon.com/images/I/71iupHrOw4L.jpg)

## Questions & Answers

**Q: I have this whdts signal generator its looking like it can't control a pwm coil what is amp rating for this unit? what might i be needing then?**
A: You need to add a power Mosfet.  Onyehn 0-24V Top Mosfet Button IRF520 MOS Driver Module For Arduino MCU ARM Raspberry pi 6 Pack

**Q: I have an expensive boat tachometer i wish to test. will this generate the proper waveform to simulate an rpm signal from the engine sensor?**
A: Yes it will.  You will get a square wave form.  This unit will let you check the full range of the tachometer
's linearity and even beyond.

**Q: Can this be set for fractional frequencies, like 10.5Hz?**
A: The frequency resolution on the push-button version is X.XX below 10Hz, and XX.X between 10.0 and 99.9Hz. Therefore, a frequency setting of 10.5Hz is obtainable. Not sure what the resolution is in these ranges for the dial-control version.

**Q: Can this be able to put pwm signal bypass radiator fans on a vw mk5 the control module**
A: If you are looking for a way to power the WHDTS with the 12V DC  vehicle power and output a PWM signal to the radiator fan you can control the fan speed.  If you are wanting to fake out a module on the vehicle you could also be successful.  I have purchased a few of these and mounted them in  plastic project boxes with 5-way binding posts and we use them in a lab  off of a DC power supply to control the speed of 3-wire computer style cooling fans.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Controllable Pump frequency and duty cycle. Must have! Worth every penny and probably under priced.
*by J***. on July 25, 2021*

This is a decent product for control of brushless motors and water pumps. My case is a Pierberg CWA-400 and this works flawlessly. There is another similar controller on Amazon but watch out as it does not have selectable frequency as this model does have full range of duty cycle and frequency. Pierburg pumps like 50-150hz and 95% duty cycle is 100% motor speed. If you set for 100%, the logic in the pump will allow for 90% pump speed. Just FYI, this is stated in the water pump manual/data sheet and test in my lab and in my car. 5 stars as it does what it claims and the internal clock is really close as verified by my rubidium standard.

### ⭐⭐⭐⭐⭐ Perfect for students, electronic hobbyists, makers and DIY enthusiasts!
*by J***. on July 2, 2019*

This signal generator is a small, easy-to-use stand-alone panel-meter-size device intended for a circuit design and prototyping bench or testing environment. Its overall build quality and high performance-to-cost ratio make it ideal for students, electronic hobbyists, makers and DIY enthusiasts. It can be used as-is or it can be easily mounted in a larger panel. It only draws a few tens of milliamps so it can be powered by almost any available DC supply from 3.3V to 30V. There is no provision for controlling output amplitude but an external potentiometer can be easily added to do this. The output source resistance is about 1 kilohm and the output waveform swings to within a few millivolts of the power supply rails. This makes it very easy to drive associated logic. Settings are remarkably stable with changes in power supply voltage over the full range, from 3.3V to 30V. A front panel button conveniently enables and disables the generator output during prototyping and testing. The LCD is bright and easy to read. It provides accurate display of operating frequency and duty cycle. A single front panel knob provides for fast setup of both frequency and duty cycle. There appears to be a serial interface that can also be used to set these values, but the rudimentary documentation and lack of headers on the printed circuit board prevent me from testing this functionality. There are two different operating modes, Normal and Precise. The Precise mode offers better duty cycle granularity over a narrower range of frequencies. A very important feature of this unit is its ability to preserve frequency and duty cycle settings after power cycling. Whatever the settings are prior to power being removed will be restored when power is re-applied. In addition, the settings are lockable, making it easier to keep your associated circuitry safe from unintentional changes. One feature I find particularly useful is the ability to set upper and lower limits for duty cycle. My video demonstrates use of this generator’s programmable lower and upper duty cycle limits to control a small RC Servo through 180 degrees of rotation. A single 18650 Li-Ion cell could power this setup for days without recharging.

### ⭐⭐⭐⭐⭐ Cheap and efficient PWM generator
*by R***J on December 7, 2025*

The control panel on my treadmill stopped working. I bought this board and set it for 20HZ . My treadmill is working again.

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-24*