Best Function Generator Kits: Top 5 of 2021 Reviewed

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There’s no point throwing good money at a function generator kit that doesn’t have the functionality and features you need.

The best function generator kits put accuracy and precision first. They are easy to use, out of the box. We also like devices you can fine-tune with arbitrary waveform customization.

On the other hand, a poor-quality function generator is a bear to assemble. Distortion and noise are significant obstacles. It also doesn’t have an intuitive interface.

To help you separate the great from the not so good, we’ve reviewed the Top 5 Function Generator Kits of 2021.

Buy with confidence knowing that you’re investing in one of the best function generators on the market. Let’s dive into the reviews.

best overall rating
Koolertron 5MHz DDS Function Generator Kit
  • Outstanding signal strength
  • Intuitive interface
  • Excellent precision
premium choice rating
Siglent Technologies Function Generator Kit
  • Durable and built to last
  • Versatile functionality
  • Crystal-clear display
great value rating
DROK Adjustable Function Generator Kit
  • Great value for the money
  • Easy calibration
  • Well-built

Top 5 Best Function Generator Kits

Koolertron 15MHz Function Generator Kit – Best Overall

Koolertron Upgraded 15MHz DDS Signal Generator Counter,High Precision...
  • Arbitrary Waveform Generator adopts large scale FPGA integrated circuit and high-speed MCU microprocessor. The internal circuit adopts the active crystal oscillator as the...
  • Using Dual-channel DDS signal and TTL electric level output to generate precise, stable, low distortion output signal. includes Sine wave, Square wave, Triangle wave, Saw...
  • With linear sweep(Max. up to 999.9s) and logarithmic frequency sweep functions.Has a frequency measurement, period measurement, positive and negative pulse width measurement...

The Koolertron 15MHz DDS Function Generator Kit took the top spot on our list for a good reason. The function generator operates on a dual-channel DDS technology.

The signal generator DIY kit handles the standard lineup of waveforms, including the sine, pulse, triangle, and square wave. The device also supports 60 user-defined waveforms.

The function generator DIY kit has a frequency range of 1Hz–100MHz on the sine wave. The generator has several measurement functions, including frequency, period, and negative pulse width.

The function generator DIY kit comes with a power adapter, Q9 cable, and USB cable.

It stands out as the best of the function generators we reviewed because of its affordable price, the range of waveforms, and its versatility, whether you want to test equipment or use it for a wide spectrum of electronics or monolithic function applications.

Highly recommended as the best overall DDS signal generator DIY kit in our reviews.

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What We Like
  • Outstanding signal strength
  • Intuitive interface
  • Incredible accuracy with impedance and frequencies
  • Available duty cycle adjustment
  • Excellent precision
What We Don’t Like
  • Some noise in the output
  • Less stability at low frequencies

Siglent Technologies SDG1032X Function Generator Kit – Premium Choice

Sale
Siglent Technologies SDG1032X Arbitrary Waveform - Function Generator
  • 1 uhz - 30 MHz
  • Square waves to 30 mhz
  • Dual channel. Sweep/ burst/ modulation/ harmonics

The Siglent Technologies SDG1032X Function Generator Kit is a good-quality build from one of the best manufacturers of these products. The reviews say it all.

While it’s the most expensive device on our roundup, it is a feature-rich model that delivers high precision.

The generator is a dual-channel unit that supports both analog and digital modulation types. The display is gorgeous and easy to read.

The function signal generator has arbitrary waveform functionality, which you can create and edit with the included software. It has a frequency range of 30 MHz and 20 Vpp amplitude.

This signal generator DIY kit shines with the number of available waveforms, including 196 preprogrammed ones. The frequency generator delivers square waves to 30 MHz.

This device has a lot to offer electronics hobbyists looking to up their game. One of the top function generators on the market of our reviews.

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What We Like
  • Well-built to last
  • Versatile functionality
  • Crystal-clear display
  • Accurate signals
  • Low noise output
What We Don’t Like
  • Pricey
  • High learning curve

DROK Adjustable Function Generator Kit – Great Value

4-20mA Generator, DROK Adjustable Signal Generator, DC 0-10V 0 4-20mA...
  • AMP & VOLT DUAL SIGNAL GENERATOR: Multifunctional DROK signal generator kit is able to generate ampere & voltage by one module, which generate 0/4 - 20mA current signal and...
  • CLEAR LED DISPLAY: Our 4-20ma signal generator has bright and clear 3-digit LED digital display screen, which can be used to monitor the output current and voltage. You just...
  • AMP & VOLT DISPLAY CALIBRATION: There are current and voltage display calibrating potentiometer on the back of the module. If the display is accurate, you can calibrate the...

The DROK Adjustable Function Generator Kit is an analog frequency generator. The primary advantage with a device of this type is cost, which is one of the reasons that make these function generators such a great value.

They are also easy to use. However, that doesn’t mean you can’t do a lot with this type of function signal generator. You can things like PLC debugging, LED testing, and a wide range of electronics applications.

The signal generator is well-designed and easy to calibrate using the potentiometer on the back of the device. It runs on DC24V. The LED display is well-lit and simple to read.

It is surprisingly accurate for the price, earning its top place on our best function generators list. While it’s barebones, the device is an excellent signal generator for the hobbyist doing general testing.

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What We Like
  • Value priced
  • Easy calibration
  • Well-built
  • Simple operation
  • Excellent accuracy
What We Don’t Like
  • Overheats with long use
  • Unstable PCB

JYE Tech FG085 Function Generator Kit

Function Generator DIY KIT by JYE Tech FG085
  • Generating continuous waveforms of Sine, Square, Triangle, Ramp (up and down), and Staircase (up and down)
  • Generating user defined arbitrary waveforms (AWG)
  • Generating frequency sweeping signals of selected waveforms. Start frequency, stop frequency, and sweep rate can be independently set

The JYE Tech FG085 Function Generator Kit is an affordable option for electronic enthusiasts who want to take the plunge into complex projects.

The generator can run the sine, square, triangle ramp, both up and down. It also supports the staircase and an arbitrary waveform.

Like other devices we reviewed, the waveform generator uses a rotary encoder to adjust the amplitude and frequency.

The LCD display is easy to read as long as your work area isn’t too bright. The function generator DIY kit includes the power supply, output cable, and the necessary components to get you up and running.

The frequency on the sine wave goes up to 200KHz, with an amplitude range: 0 – 10V peak-to-peak. You can set the offset, amplitude, and frequency with the push of a button on the number pad.

On the downside, the waveform generator is noisy, making it unsuitable for any audio projects or testing. Assembly requires watching some YouTube videos, too.

Nevertheless, it’s a great function signal generator for the hobbyist still dipping his toes in the shallow end of the electronics pool.

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What We Like
  • Affordably priced
  • Settings saved on shutdown
  • Simple sweeping function
  • Frequencies up to 200KHz
  • Seven different continuous waveforms
What We Don’t Like
  • Not usable for audio applications
  • Unclear assembly instructions

Jinwen Function Generator Kit

JWGJW 24MHz Dual-Channel Arbitrary Waveform DDS Function Signal...
  • Output signal frequency high accuracy, good stability
  • Signal amplitude up to 20Vpp; Pulse wave pulse width precision can be adjustable
  • Instrument can realize the adjustment program of function parameters , easy to use

The Jinwen Function Generator Kit stands out as a great value for a mid-range device. It is a complete function generator DIY kit.

It comes with some extra components, including two 1.1m Q9 cables, one 1.25mUSB cable, a power supply cable, and a disc with the manual and extra goodies to get you started.

The generator is a DDS direct digital synthesis device that is simple to use and easy on your pocketbook.

The function generator has two outputs, CH1 and CH2. It delivers an excellent array of waveforms, including sine, square, pulse, triangle, and sawtooth.

It also supports a DC voltage fixed signal. You can set them up to 20V peak-to-peak.

You can also save up to 20 locations to pick up where you left off the next time.

The waveform generator has a good frequency range of 0Hz–24MHz. Our only gripes were the short electrical cord. The device is lightweight, which means it’s going to move when you push the buttons.

Overall, it’s an excellent choice for electronics enthusiasts.

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What We Like
  • Excellent value for the price
  • Intuitive operation
  • Top-notch functionality
  • High precision
  • 20 memory presets
What We Don’t Like
  • Short electrical cord
  • Lack of a sensitivity control

FAQs

Does a Function Generator Need an Electrical Cable?

It depends on your application and the wattage of the circuit you want to test. Most have an output impedance of 50 ohms, which can get the job done.

If you need more juice, then an external power source is necessary, whether you build it yourself or buy one.

What’s the Difference Between a Signal Generator and a Function Generator?

A signal generator describes a device that can produce different signals, whether it’s waveforms, radio frequency, or other forms.

A function generator delivers several kinds of waveforms, such as sine waves. A function generator is a signal generator, but the latter isn’t necessarily a function generator.

What Are the Main Types of Signals?

You’ll see both analog and digital signals. The former is older technology. While analog produces continuous signals, digital are discrete variables with individual values.

Analog devices are usually less expensive and streaightforward to operate. That makes them excellent choices for fieldwork or beginners just getting into electronics.

Digital devices deliver greater accuracy and precision with their crystal-controlled clocks. They are sometimes pricer because of the necessary digital-to-analog converter (DAC) they need to operate.

What Are Hole Components?

The term refers to PCB components that have holes in them—literally! These pre-drilled spaces make these components easier and cheap to assemble.

You often see them in DIY devices. You can think of this technology as more user-friendly and intuitive.

Conclusion

The Koolertron Upgraded 15MHz Function Generator Kit took our top spot for the best of our roundup of function generators. It scored high marks for the number of waveforms it supports, from sine waves to user-defined ones.

The components of this device are also high-quality. The fact that it’s so user-friendly and intuitive make it a no-brainer for the dealmaker category.

The Siglent Technologies SDG1032X Function Generator Kit is an excellent choice for the serious hobbyist looking to test a broader range of applications with harmonics and modulation with DDS technology.

It is a top performer on all scores, based on our reviews.

The versatility of this device is evident with its support of analog and digital modulation.

It also goes above and behind the standard wave types with its impressive list of presets. It is the only generator you’ll need to test a PCB or other electronic equipment.

The DROK Adjustable Function Generator Kit is a simple device with excellent functionality for the price. It is the top analog frequency generator in our reviews. While it’s affordable, it’s also well-made with quality components.

The accuracy is spot-on to test equipment and for general troubleshooting. It’s a solid performer even in low frequency.

The remaining generators on our list make excellent choices in the mid-price range of our reviews. They both offer stability and accuracy that are so essential for many applications.

The greater wave functionality of these devices and higher-end components is a natural bridge to more complicated uses.

About Blake Sutton

Blake has worked as an electrician for over 10 years, receiving his Journeyman Electrician license in 1998. Looking to take his professional electrical career further, in 2008 he received his Bachelor of Science in Electrical Engineering (BSEE) from the University of Texas in Austin. Blake now works full time as an electrical engineer, specializing in power systems.