--- product_id: 118521153 title: "Frequency Generator, DC 3.3V-30V 5-30mA 1Hz-150kHz Adjustable Output PWM Pulse Duty Cycle Square Wave Function Signal Generator Module" brand: "drok" price: "₩36461" currency: KRW in_stock: true category: "Drok" url: https://www.desertcart.kr/products/118521153-frequency-generator-dc-3-3v-30v-5-30ma-1hz-150khz store_origin: KR region: South Korea --- # 3.3V-30V wide voltage range 1Hz-150kHz frequency span Lock function prevents misoperation Frequency Generator, DC 3.3V-30V 5-30mA 1Hz-150kHz Adjustable Output PWM Pulse Duty Cycle Square Wave Function Signal Generator Module **Brand:** drok **Price:** ₩36461 **Availability:** ✅ In Stock ## Summary > ⚙️ Unlock precision signal generation and never miss a beat! ## Quick Answers - **What is this?** Frequency Generator, DC 3.3V-30V 5-30mA 1Hz-150kHz Adjustable Output PWM Pulse Duty Cycle Square Wave Function Signal Generator Module by drok - **How much does it cost?** ₩36461 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/118521153-frequency-generator-dc-3-3v-30v-5-30ma-1hz-150khz) ## Best For - drok enthusiasts ## Why This Product - Trusted drok brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Lock & Auto-Save:** Lock settings to avoid accidental changes and auto-save your configurations for hassle-free use - • **Dynamic Frequency Range:** Generates signals from 1Hz to a blazing 150kHz, perfect for experimental and motor control - • **User-Friendly LCD Display:** Clear frequency and duty cycle readouts keep you informed in real-time - • **Precision at Your Fingertips:** Dual modes with up to 0.1% duty cycle accuracy for flawless signal control - • **Versatile Voltage Compatibility:** Operates seamlessly from 3.3V to 30V to fit any project power needs ## Overview The DROK Frequency Generator is a compact, high-performance PWM pulse signal module supporting a broad 3.3V-30V input and frequency output from 1Hz to 150kHz. Featuring dual operation modes, an intuitive LCD display, adjustable duty cycle, and a lock function, it’s engineered for professionals demanding precise, reliable signal generation for motor drivers, MCU pulse control, and experimental development. ## Description DROK Function Generator Parameter: Working voltage: DC 3.3V-30V Frequency range: normal mode 1Hz-150kHz; accurate mode 1Hz-15kHz Frequency accuracy: 2% in each range Signal load capacity: output current about 5-30mA Output amplitude: PWM amplitude equals to input voltage value Working temperature: -20℃~+70℃ Duty cycle range: 0-100%Features: With 2 modes. Operated by code potentiometer. With lock function to avoid misoperation. Duty cycle upper and lower bounds is adjustable.2 Modes: Normal mode: Frequency range 1Hz-150kHz, duty cycle 000-100%, duty cycle step 1% Accurate mode: Frequency range 1Hz-15kHz, duty cycle 00.0-100%, duty cycle step 0.1%Application: As square wave signal generator for experimental development; As square wave signal generator for motor driver; As adjustable pulse generator for MCU; As pulse generator, control related circuits (PWM dimming, speed regulating).Frequency Display Instruction: The frequency is divided into 4 ranges and switched automatically. 1. XXX: minimum unit 1Hz, value range 1Hz~999Hz. 2. X.XX: minimum unit 0.01kHz, value range 1.00kHz~9.99kHz. 3. XX.X: minimum unit 0.1kHz; value range 10.0kHz~99.9kHz. 4. X.X.X: minimum unit 1kHz; value range 1kHz~150kHz.e.g. Frequency displays 100 represents 100Hz; displays 1.01 represents 1.01kHz; displays 54.1 represents 54.1kHz; displays 1.2.4 represents 124kHzPackage Included: 1x Function Signal Generator ## Features - PARAMETER --- working voltage range 3.3V-30V; frequency range 1Hz-150kHz/1Hz-15kHz; output current 5-30mA; frequency accuracy 2% in each range. - APPLICATION --- as square wave signal generator for experimental development; as square wave signal generator for motor driver; as adjustable pulse generator for MCU; as adjustable pulse generator for PWM dimming, speed regulating, etc. - DISPLAY--- clear LCD displays frequency & duty ratio value. - MODE --- 2 modes, normal mode & accurate mode. - FEATURE --- with lock function; PWM output, can set frequency & duty cycle separately; duty cycle upper and lower bounds adjustable; support serial communication; all data auto saved after setting. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07P848DYQ | | Best Sellers Rank | #55,343 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #7 in Function Generators | | Brand Name | DROK | | Color | Black | | Customer Reviews | 4.3 4.3 out of 5 stars (293) | | Display Type | LCD | | Item Weight | 0.01 kg | | Manufacturer | DROK | | Model | 200393 | | Number of Items | 1 | | Part Number | 200393 | ## Product Details - **Brand:** DROK - **Color:** Black - **Display Type:** LCD - **Item Weight:** 0.01 kg - **Manufacturer:** DROK ## Images ![Frequency Generator, DC 3.3V-30V 5-30mA 1Hz-150kHz Adjustable Output PWM Pulse Duty Cycle Square Wave Function Signal Generator Module - Image 1](https://m.media-amazon.com/images/I/61XoNzzshfL.jpg) ## Available Options This product comes in different **Number Of Items** options. ## Questions & Answers **Q: Will this work as a 7.83 hz (schumann resonance) generator to infuence ambient room frequency....or does this have totally unrelated applications?** A: First off I know nothing about the application that you are interested in using this for. That being said this unit doesn't have the ability to dial down to .83 hz only whole numbers. The output is DC square wave. Hope this helps. **Q: how do you keep the control on frequency instead of keeping defaulting to duty cycle setting? It is very difficult to control frequency due to this.** A: This is not the pulse generator you are looking for. This is a fixed frequency, varible width PEM generator. I think what you are looking for is something like this:"Radio Control Servo ESC Consistency Digital Tester 1-4S for Speed Controller" or "Electronic Speed Controller Servo Tester ESC for RC Airplane Helicopters" Both on EBAA **Q: how can I connect this device to speakers and what do I need to do so?** A: this is a frequency generator not a radio. even if you could all you would get is noise. **Q: Will this work for a diy "chaterbox" which would push no more than 20-24v in a pulse format every 3-5 seconds. with 2 9v batteries as input?** A: As long as you do not have a load that draws more than 25ma ## Frequently Bought Together - DROK Frequency Generator, DC 3.3V-30V 5-30mA 1Hz-150kHz Adjustable Output PWM Pulse Duty Cycle Square Wave Function Signal Generator Module - DROK Signal Generator, DC 3.3-30V Function Generator 5-30mA LCD Display PWM Pulse Frequency Duty Cycle Rectangular Wave Square Wave Signal Generator - HiLetgo 2pcs 3 Channel PWM Pulse Generator Signal Generator Module Adjustable Frequency Square Wave Rectangular Wave Signal Generator Duty Cycle with LCD Display 1Hz-150Khz --- ## 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.kr/products/118521153-frequency-generator-dc-3-3v-30v-5-30ma-1hz-150khz](https://www.desertcart.kr/products/118521153-frequency-generator-dc-3-3v-30v-5-30ma-1hz-150khz) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-09-14*