--- 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: "130.91 DT" currency: TND in_stock: true reviews_count: 9 category: "Mi Oyoow" url: https://www.desertcart.tn/products/139267900-pwm-frequency-generator-1-channel-1hz-150khz-adjustable-pulse-duty store_origin: TN region: Tunisia --- # Clear LCD frequency & duty cycle display Power-down memory & knob lock 1Hz-150KHz adjustable frequency 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:** 130.91 DT **Availability:** ✅ In Stock ## Summary > ⚡ Unlock precision pulses, power your projects, and never miss a beat! ## 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?** 130.91 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/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 - • **Smart Memory & Lock:** Never lose your settings with power-down memory and safeguard your setup with a knob lock to prevent accidental changes. - • **Dual Mode Flexibility:** Seamlessly switch between frequency and duty cycle adjustments, plus UART support for advanced control. - • **Crystal-Clear LCD Display:** Instantly monitor frequency and duty cycle with a high-definition screen designed for clarity and accuracy. - • **Precision Frequency Control:** Dial in frequencies from 1Hz up to a lightning-fast 150KHz for ultimate signal customization. - • **Versatile Application Ready:** Perfect for motor drivers, MCU dimmers, speed governors, and experimental development — be the innovator in your circle. ## Overview The MiOYOOW PWM Frequency Generator is a compact, 1-channel module offering adjustable pulse frequencies from 1Hz to 150KHz with precise duty cycle control. Featuring a bright LCD display and rotary switch, it supports dual work modes and UART interface, with power-down memory and knob lock to preserve and protect your settings. Ideal for professionals and hobbyists alike, it drives motors, dimmers, and experimental circuits with reliable, stable output and versatile power input from 3.3V to 30V. ## 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 | #125,154 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #56 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. ## Frequently Bought Together - 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 - smseace 20Amp Electric Button Breaker 125/250VAC,Thermal Overload Protector L1 Series with Manual Reset, Waterproof Button Cap L1-20A - FT-140-43 Ferrite Toroid Core --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/139267900-pwm-frequency-generator-1-channel-1hz-150khz-adjustable-pulse-duty](https://www.desertcart.tn/products/139267900-pwm-frequency-generator-1-channel-1hz-150khz-adjustable-pulse-duty) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-04*