--- product_id: 356685058 title: "Frequency Generator, DROK DC 3.3V-30V 5-30mA 1Hz-150kHz Adjustable Output PWM Pulse Duty Cycle Square Wave Function Signal Generator Module" brand: "drok" price: "€ 50.00" currency: EUR in_stock: false reviews_count: 5 category: "Drok" url: https://www.desertcart.hr/products/356685058-frequency-generator-drok-dc-3-3v-30v-5-30ma-1hz store_origin: HR region: Croatia --- # 3.3V-30V wide voltage range 1Hz-150kHz frequency span Adjustable 0-100% PWM duty cycle Frequency Generator, DROK DC 3.3V-30V 5-30mA 1Hz-150kHz Adjustable Output PWM Pulse Duty Cycle Square Wave Function Signal Generator Module **Brand:** drok **Price:** € 50.00 **Availability:** ❌ Out of Stock ## Summary > ⚙️ Unlock precision power: The signal generator that keeps your projects ahead of the curve! ## Quick Answers - **What is this?** Frequency Generator, DROK 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?** € 50.00 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/356685058-frequency-generator-drok-dc-3-3v-30v-5-30ma-1hz) ## 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 - • **Lock & Load Confidence:** Lock function prevents accidental changes—perfect for critical testing environments. - • **Dynamic Frequency Range:** Generates signals from 1Hz to a blazing 150kHz, covering all experimental bases. - • **Smart Auto-Save & Display:** Clear LCD readout with auto-save ensures your settings are always ready when you are. - • **Precision at Your Fingertips:** Dual modes with up to 0.1% duty cycle step for ultra-accurate signal tuning. - • **Versatile Voltage Compatibility:** Operates seamlessly from 3.3V to 30V DC, fitting diverse project needs. ## Overview The DROK Frequency Generator is a compact, high-performance PWM pulse signal module designed for professionals and hobbyists alike. Operating across a broad 3.3V to 30V range, it delivers adjustable frequencies from 1Hz up to 150kHz with 2% accuracy, featuring dual modes for normal and precise control. Its clear LCD display, lock function, and auto-save capabilities make it an indispensable tool for experimental development, motor control, MCU pulse generation, and PWM applications, ensuring reliable and customizable waveform output every time. ## 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 Review: Great product at a great price Review: Elementos electrónicos útiles - El vendedor cumplio lo comprometido en su oferta y el elemento electronico esta funcionando correctamente, de igual forma fue entregado muy en tiempo. ## 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 | #165,979 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #129 in Function Generators | | Brand | DROK | | Brand Name | DROK | | Colour | Black | | Country of Origin | USA | | Customer Reviews | 4.2 out of 5 stars 243 Reviews | | Display Type | LCD | | Item Weight | 0.01 Kilograms | | Manufacturer | DROK | | Voltage | 30 Volts (DC) | ## Product Details - **Brand:** DROK - **Color:** Black - **Display Type:** LCD - **Item Weight:** 0.01 Kilograms - **Voltage:** 30 Volts (DC) ## Images ![Frequency Generator, DROK 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) ![Frequency Generator, DROK DC 3.3V-30V 5-30mA 1Hz-150kHz Adjustable Output PWM Pulse Duty Cycle Square Wave Function Signal Generator Module - Image 2](https://m.media-amazon.com/images/I/71lyE9VmWaL.jpg) ![Frequency Generator, DROK DC 3.3V-30V 5-30mA 1Hz-150kHz Adjustable Output PWM Pulse Duty Cycle Square Wave Function Signal Generator Module - Image 3](https://m.media-amazon.com/images/I/61ZbGKzIGnL.jpg) ![Frequency Generator, DROK DC 3.3V-30V 5-30mA 1Hz-150kHz Adjustable Output PWM Pulse Duty Cycle Square Wave Function Signal Generator Module - Image 4](https://m.media-amazon.com/images/I/61mYD86yrcL.jpg) ![Frequency Generator, DROK DC 3.3V-30V 5-30mA 1Hz-150kHz Adjustable Output PWM Pulse Duty Cycle Square Wave Function Signal Generator Module - Image 5](https://m.media-amazon.com/images/I/61TloxqaFRL.jpg) ## 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 ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product at a great price *by M***R on 3 February 2026* ### ⭐⭐⭐⭐⭐ Elementos electrónicos útiles *by H***N on 10 May 2023* El vendedor cumplio lo comprometido en su oferta y el elemento electronico esta funcionando correctamente, de igual forma fue entregado muy en tiempo. ### ⭐⭐⭐⭐⭐ DROK Frequency Generator, DC 3.3V-30V 5-30mA 1Hz-150kHz Adjustable Output PWM Pulse *by L***N on 7 November 2024* ## 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.hr/products/356685058-frequency-generator-drok-dc-3-3v-30v-5-30ma-1hz](https://www.desertcart.hr/products/356685058-frequency-generator-drok-dc-3-3v-30v-5-30ma-1hz) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-04-27*