---
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: "143 Lei"
currency: RON
in_stock: true
reviews_count: 8
url: https://www.desertcart.ro/products/118521153-drok-frequency-generator-dc-3-3v-30v-5-30ma-1hz
store_origin: RO
region: Romania
---

# 1Hz-150kHz Range 2% Frequency Accuracy 3.3V-30V Power 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:** 143 Lei
**Availability:** ✅ In Stock

## Summary

> ⚙️ Power Up Your Projects with Precision!

## 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?** 143 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/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

- • **Smart Memory:** Auto-save feature ensures your settings are always at your fingertips.
- • **Customizable Output:** Adjustable duty cycle and frequency settings for ultimate flexibility.
- • **User-Friendly Display:** Clear LCD for effortless monitoring of frequency and duty cycle.
- • **Dual Mode Functionality:** Switch between normal and accurate modes for tailored performance.
- • **Unleash Your Creativity:** Transform your projects with precise frequency control.

## Overview

The DROK Frequency Generator is a versatile signal generator module designed for experimental development and motor control. With a working voltage range of 3.3V-30V and a frequency range of 1Hz-150kHz, it offers adjustable output and a clear LCD display for easy monitoring. Ideal for MCU applications and PWM dimming, this module features dual modes, customizable settings, and an auto-save function for convenience.

## Description

DROK Frequency Generator, DC 3.3V-30V 5-30mA 1Hz-150kHz Adjustable Output PWM Pulse Duty Cycle Square Wave Function Signal Generator Module

## 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.

## Product Details

- **Color:** Black
- **Brand:** DROK
- **Voltage:** 30 Volts (DC)
- **Item Weight:** 0.01 Kilograms
- **Display Type:** LCD

## 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

### ⭐⭐⭐⭐⭐ Excellent.
*by D***É on July 9, 2025*

Worked perfectly. Modified its output stage and wrapped some other circuitry around it to create a J1772 Control Pilot signal generator for EMC testing at a publicly traded electric vehicle manufacturer. In a judo move that usually works against Murphy's law, I bought 2 or 3 of these, to guarantee the first one would work right, never break, and never get lost.

### ⭐⭐⭐⭐⭐ Great controller for running brushless radiator fans
*by C***S on September 5, 2024*

The media could not be loaded. If you are looking for a basic speed controller to run brushless fans on a automotive project. This simple one dial controller work great. Easy to use and wire up. Cheap and work perfectly. And the best part is when the box is disconnected from power and reconnect it, it remembers your last setting to set you fan speed and leave it till you need it. I cruise around town with a 462 cammed BBC at 40% fan speed. with the AC cranked in 98 degree wether in traffic. Dial it up to 70% and works great

### ⭐⭐⭐⭐ 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.

## 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.ro/products/118521153-drok-frequency-generator-dc-3-3v-30v-5-30ma-1hz](https://www.desertcart.ro/products/118521153-drok-frequency-generator-dc-3-3v-30v-5-30ma-1hz)

---

*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-05*