--- product_id: 118521153 title: "DROK 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: "115 zł" currency: PLN in_stock: true reviews_count: 13 category: "Drok" url: https://www.desertcart.pl/products/118521153-drok-frequency-generator-dc-3-3v-30v-5-30ma-1hz store_origin: PL region: Poland --- # 3.3V-30V wide voltage range 1Hz-150kHz frequency span Lock function prevents misoperation DROK 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:** 115 zł **Availability:** ✅ In Stock ## Summary > ⚙️ Unlock precision power with DROK’s frequency wizardry! ## Quick Answers - **What is this?** DROK 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?** 115 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/118521153-drok-frequency-generator-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 - • **Dynamic Frequency Range:** Generates square waves from 1Hz to 150kHz, covering all your PWM and motor control needs. - • **Secure & Smart Settings:** Lock function and auto-save ensure your configurations stay intact during critical operations. - • **User-Friendly Interface:** Clear LCD display shows real-time frequency and duty cycle values for instant feedback. - • **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, fitting diverse experimental setups. ## Overview The DROK Frequency Generator is a compact, high-performance PWM pulse and square wave signal module designed for professionals and hobbyists alike. Supporting a broad voltage range (3.3V-30V) and frequency output from 1Hz to 150kHz, it offers dual operation modes with fine duty cycle adjustments and a clear LCD readout. Its lock function and auto-save features guarantee reliable, stable performance for motor drivers, MCU pulse generation, and experimental development, making it an essential tool for cutting-edge electronic projects. ## 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 - Worked perfectly to modulate the Mercedes electric fan I installed on my Jeep. Review: If you only need 1Hz resolution & a square wave out, this is a great choice! - This is a nice little budget-friendly frequency source. Reasonably low frequency drift, and low noise content on the square wave output these work great for operational burn-in testing in my test lab at work. If it could adjust the frequency in 0.1Hz increments it would have been a full 5 stars. ## 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 | #33,497 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #6 in Function Generators | | Date First Available | February 28, 2019 | | Item Weight | 0.352 ounces | | Item model number | 200393 | | Manufacturer | DROK | | Package Dimensions | 4.02 x 3.66 x 1.57 inches | ## Product Details - **Brand:** DROK - **Color:** Black - **Display Type:** LCD - **Item Weight:** 0.01 Kilograms - **Voltage:** 30 Volts (DC) ## Images ![DROK 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 ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product at a great price *by M***R on February 3, 2026* Worked perfectly to modulate the Mercedes electric fan I installed on my Jeep. ### ⭐⭐⭐⭐ If you only need 1Hz resolution & a square wave out, this is a great choice! *by K***S on December 8, 2024* This is a nice little budget-friendly frequency source. Reasonably low frequency drift, and low noise content on the square wave output these work great for operational burn-in testing in my test lab at work. If it could adjust the frequency in 0.1Hz increments it would have been a full 5 stars. ### ⭐⭐⭐⭐⭐ User interface and extra settings *by C***. on August 26, 2025* The user interface took a little time to master, but it's intuitive once you have spent a a few minutes on it. The higher accuracy mode (0.1% steps) worked well with the motor I used that required very-low RPM values (0.1% to 2.9% settings). Also good that the box retains the last setting prior to power off and and back on. I'll design something that has higher accuracy for my final product, but this was great for my customer demo and lab testing. ## 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.pl/products/118521153-drok-frequency-generator-dc-3-3v-30v-5-30ma-1hz](https://www.desertcart.pl/products/118521153-drok-frequency-generator-dc-3-3v-30v-5-30ma-1hz) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-09*