---
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: "$47"
currency: NZD
in_stock: true
reviews_count: 13
category: "Drok"
url: https://www.desertcart.nz/products/118521153-drok-frequency-generator-dc-3-3v-30v-5-30ma-1hz
store_origin: NZ
region: New Zealand
---

# 3.3V-30V wide voltage range 1Hz-150kHz frequency range Adjustable PWM duty cycle 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:** $47
**Availability:** ✅ In Stock

## Summary

> ⚙️ Unlock precision power: Your signal, your rules.

## 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?** $47 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/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 PWM Output:** Customize frequency and duty cycle independently with adjustable upper and lower bounds for ultimate control.
- • **Lock & Save Functionality:** Prevent accidental changes with lock mode and enjoy hassle-free auto-saving of all your settings.
- • **User-Friendly LCD Display:** Clear, auto-switching frequency readout ensures you’re always in command of your signal parameters.
- • **Precision Frequency Control:** Dual modes offer up to 0.1% duty cycle steps and 2% frequency accuracy for flawless signal generation.
- • **Versatile Voltage Compatibility:** Operates seamlessly from 3.3V to 30V DC, fitting perfectly into diverse experimental and industrial setups.

## Overview

The DROK Frequency Generator is a compact, high-performance PWM pulse signal module designed for professionals needing precise frequency control from 1Hz to 150kHz. Supporting a broad 3.3V-30V input range and output currents of 5-30mA, it features dual operation modes, an intuitive LCD display, adjustable duty cycles, and a lock function to safeguard settings. Ideal for experimental development, motor drivers, MCU pulse generation, and PWM dimming or speed regulation, this module delivers reliable, customizable square wave signals with 2% frequency accuracy.

## 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 | #25,839 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #5 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

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-02*