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Top 10 Variable Frequency Generator of 2020 – Consumer Guide & Reviews

Rank No. #1
Onyehn XR2206 High Precision Function Signal Generator DIY Kit Sine/Triangle/Square Output 1Hz-1MHz Adjustable Frequency Amplitude + Transparent Case Box Shell
  • High Precision, can generate sine/triangle/square waveforms.
  • Output frequency range: 1Hz-1MHz and Adjustable frequency and amplitude.
  • Wide power supply range, use 9-12V external power or 9V battery(NOT Included).
  • This is a DIY kit with All are through hole components,easily assemble the Function Generator by yourself.
  • Onyehn XR2206 High Precision Function Signal Generator DIY Kit Sine/Triangle/Square Output 1Hz-1MHz Adjustable Frequency Amplitude + Transparent Case Box Shell
Rank No. #2
NOYITO ICL8038 Signal Generator Module Medium Low Frequency Source Sine Wave Triangle Wave Square Wave Triple Waveform Generator Module
  • The ICL8038 is a precision oscillation integrated circuit with multiple waveform outputs. The frequency and duty cycle of the output waveform can also be controlled by current or resistance. Because the chip has a frequency-modulated signal input, it can be used to frequency-modulate low-frequency signals.
  • Produced with a low frequency drift when the temperature changes, the maximum does not exceed 50ppm / ℃; With sine wave, triangle wave, square wave and other function signal output; Sine wave output with less than 1% distortion; The triangular wave output has a high linearity of 0.1%; Wide variation of work cycle, adjustable from 2% to 98%; Easy to use, requiring only minimal external conditions.
  • This module is designed for the common frequency range. It can be adjusted in 5 gears and can generate low-distortion sine wave, triangle wave, square wave and other pulse signals from 10Hz to 450KHz.
  • Sine waves can be used for test signals, drive signals, carrier frequency signals, etc. Square wave can be used to switch signals, trigger signals, etc. The triangular wave is mainly used for scanning signals.
  • Operating voltage: Single-supply DC point 12V-15V. Output waveforms: sine wave, square wave, triangle wave. Frequency range: 10Hz-450KHz.
Rank No. #3
PEMENOL Signal Generator, DC 3.3-30V Adjustable PWM Pulse Frequency Duty Cycle 1Hz-150KHz Motor Controller LCD Display
  • PEMENOL signal generator operating voltage range: DC 3.3-30V, frequency range: 1Hz~150KHz, duty cycle range: 0-100%.
  • Dual-mode output: PWM mode: adjusting frequency and duty cycle; pulse mode: control start and stop and its number of times, adjust high level signal time and low level signal time.
  • With start and stop button to control start and stop. ❤️❤️❤️ For detailed instructions, see the link:
  • LCD Display: the LCD clearly displays frequency and duty ratio, all parameters will be automatically saved after the setting is completed and will not be lost when the power is turned off.
  • Application: used for PWM signal generator; drive lamp / motor / solenoid valve; square wave / rectangular wave signal generator; servo motor / stepper motor / electric jaw.
Rank No. #4
UCTRONICS DC 0-10V 0/4-20mA Current Voltage Signal Generator, USB Power Supply Interface Analog Simulator for PLC and Panel Debugging, Device Testing, Frequency Converter, Flow Valve
  • Power Supply: external micro USB-5V or external power DC 15-30V, each way makes the generator work, both ways also can be connected at the same time.
  • Voltage Output: 0-10V, precision is 0.01V, rotate the encoder knob to adjust output voltage, can be calibrated.
  • Current Output: 0-22mA, precision is 0.01mA, rotate the encoder knob to adjust output current, can be calibrated.
  • Multiple Display: just push the small botton to switch the display mode between voltage and current, you can also follow the instructions to switch 0-100 percent or 0-50HZ display.
  • Product Dimension: 3.94” x 2.36” x 0.98” (100mm x 60mm x 25mm), portable and convenient. Note: optional 803040 battery expansibility (battery not included). Please search ASIN "B07PCKCV5K" to get built-in battery generator.
Rank No. #5
KKmoon ADF4351 Signal Source VFO Variable-Frequency Oscillator Signal Generator 35MHz to 4000MHz Digital LCD Display
  • /◕‿◕/Core components: avr mega8 microcontroller, cost-effective single-chip microcomputer, is commonly used m16 low version, peripheral ADC has a 2.56V regulator source, this is not available in other mid-range microcontrollers.
  • /◕‿◕/Adf4351, the traditional VCO+PLL+6 series high-speed bistable circuit (except 2 circuits, D trigger). 35-2200MHz is obtained by frequency division. After being shaped, the amplitude of the fundamental wave does not change much. This is for high frequency.
  • /◕‿◕/DDS is difficult to achieve in full bandwidth. (after the signal is divided, it must be a rectangular wave, and the amplitude becomes the trigger level). Simple RF signal source signal generator.
  • /◕‿◕/This product uses the single-chip microcomputer as the core, which greatly simplifies the design, shortens the development time, saves the cost, and is simple, reliable and practical.
  • /◕‿◕/Provide a signal source for the AC path of the device under test, analyze the frequency amplitude characteristics of the AC path, and pay attention to the impedance of the device under test.
Rank No. #6
MAX038 0.1Hz ~ 20MHz Signal Generator Module High-Frequency Triangular/Sine/Rectangular/Pulse Wave
  • The MAX038 is a high-frequency, precision function generator producing accurate, high-frequency triangle, sine, square, and pulse waveforms
  • The output frequency can be adjusted by the four-digit digital switch Output waveform can be set by 2-digit digital switch The frequency and duty ratio can be adjusted by potentiometer
  • Distortion can be adjusted by potentiometer 0.1Hz to 20MHz Operating Frequency Range Independent Frequency and Duty-Cycle Adjustments
  • 350 : 1 Frequency Sweep Range, 15% ~85% Variable Duty Cycle Low-Impedance Output Buffer: 0.1Ω, Low-Distortion Sine Wave: 75%, Low 200ppm/°C Temperature Drift
  • With TTL/CMOS compatible output, can be used to synchronize external devices
Rank No. #7
Motors for Makers: A Guide to Steppers, Servos, and Other Electrical Machines
  • Amazon Kindle Edition
  • Matthew, Scarpino (Author)
  • English (Publication Language)
  • 316 Pages - 11/26/2015 (Publication Date) - Que Publishing (Publisher)
Rank No. #8
Variable Frequency Drive, MYSWEETY AC 220V/2.2KW 3HP 12A VFD Inverter Frequency Converter for Spindle Motor Speed Control (1 phase INPUT and 3 phase OUTPUT)
  • This is single phase VFD with 1 phase INPUT and 3 phase OUTPUT,the power is 2.2KW, 220V,12A, VFD Dimension: 130 x 103 x 200 mm (L x W x H). ★★The shell is slightly changed, the buttons are used correspondingly, and the operation is the same.
  • Input voltage: 220V(+/-15%); Output voltage: 220VAC; Input frequency: 50/60 Hz; Output frequency: 0-400 Hz; Input phase: 1 phase; Output phase: 3 phase.
  • Application: Spindle Motor, Drill Press, CNC, HVAC, Lathe, Milling, Pumps, Conveyors, Mach3, Fan, Cooling, Compressor, Three-phase motor and other machines!
  • Due to the VFD product is a flexibly configurable device , you are welcomed to consult with our CS make best choice for your exact application.
  • Simple to operate and wire, convenient for you to use. Warranty: 1 Year replace or refund!
Rank No. #9
PEMENOL Motor Speed Controller PWM DC 5V 12V 24V 150W Adjustable Speed Regulator with Stepless Variable Rotary Switch PWM Signal Generator Driver Module
  • 【Soft-start protection】 PEMENOL The motor controller has a soft-start protection function that can effectively reduce the inrush current, protect the motor and prolong the life of the motor.
  • 【Digital Encoder Button】 With infinitely variable speed controller setting, precise engine speed control and easy-to-adjust control.
  • 【Features】 LCD HD display. Can adjust the duty cycle, the upper and lower duty cycle limits and the operating frequency. Comes with start and stop button and can be controlled by external switch.
  • 【Parameter memory function】 The adjustable electronic speed controller can automatically save the set parameters to prevent data loss after a power failure.
Rank No. #10
HiLetgo Si5351 Si5351A I2C IIC High Frequency Signal Generator Square Wave Frequency Generator 3.3-5V 8KHz -160MHz for Arduino
  • This chip has a precision 25MHz crystal reference and internal PLL and dividers
  • It can generate just about any frequency, from <8KHz up to 150+ MHz.
  • The Si5351A clock generator is an I2C controller clock generator.
  • It uses the onboard precision clock to drive multiple PLL's and clock dividers using I2C instructions.
  • Outputs are 3Vpp, either through a breadboard-friendly header or, for RF work, an optional SMA connector.
SaleRank No. #11
B&K Precision 4001A Sweep Function Generator with Dial, 0.5 Hz to 4 MHz Frequency Range
  • Generates Sine, Triangle & Square waveforms from 0.5 Hz to 4 MHz
  • 20 Vpp output into open circuit (10 Vpp into 50 ohms)
  • Variable amplitude output plus 20 dB attenuator
  • Variable DC offset, plus/minus 10 V into open circuit, plus/minus 5 V into 50 ohms
  • TTL output
Rank No. #12
WHDTS Signal Generator 1-Channel 1Hz-150KHz PWM Pulse Frequency Duty Cycle Adjustable Module LCD Display
  • 1. It's 1-channel PWM output signals. The Adjustable Frequency Range: from 1Hz to 150KHz.
  • 2. Shell Protection and Clear LCD high definition Display: Display both Frequency and Duty Cycle in more clear status. High precision detection.
  • 3. Dual Work Mode. Support both Frequency Adjustment and Duty Cycle Adjustment. Support UART. Support enable output.
  • 4. Support power-down memory function: no need to set the data after power-off. Knob supports lock function to avoid misoperation.
  • 5. Wider Application: Square wave signal generator, generating square wave signal for experimental development, generating square wave signal that controls the motor driver, and generating adjustable pulses for MCU Dimmer; Dimmer; Speed governor, and so on.
SaleRank No. #13
TRC AECM20020-3-012 Electra Check Digital Monitor for All AC Power Sources, Black with White Face
  • Fully tests incoming power for Open Ground, Reverse Polarity, and High/Low Voltage
  • Three display modes are available: Alternating voltage and frequency (VOLT/FREQ.), Voltage only (VOLTAGE), Frequency only (FREQUENCY)
  • Provides accurate testing and monitoring of all AC power sources types, RMS voltage and frequency meter, multi-tone fault alarm, hands-free auto reset, advanced microelectronics, one-button operation, wiring diagnostics, and LCD display with LED backlight
  • Plugs into any 120V outlet inside the RV
  • UL listed
Rank No. #14
Walmeck XR2206 High Precision Function Signal Generator DIY Kit Sine/Triangle/Square Output 1Hz-1MHz Adjustable Frequency Amplitude
  • High resolution, can generate sine/triangle/square waveforms.
  • Frequency range: 1Hz-1MHz.
  • Adjustable frequency and amplitude.
  • Frequency adjustment features coarse tuning and fine tuning.
  • Wide power supply range, use 9-12V external power or 9V battery(NOT Included).
Rank No. #15
UCTRONICS DC 9V 12V 24V 4A Variable Power Supply 5-30V to 0.6-30V Adjustable Buck Boost Converter, Portable Bench Constant Voltage Current Stabilized Regulator Module
  • Input Voltage: DC 5V-30.0V (7V and higher recommended); Output Voltage: DC 0.6V-30.0V; Output Current: 0-4.0A; Output Power: 35W (up to 50W with air cooling)
  • Constant Voltage & Current: This digital converter module can switch between constant voltage mode and constant current mode to meet variable requirenment of usage, and the output voltage/current can be adjusted by rotating the knob
  • Multi-display: Input/out voltage(V), current (A), power (W), electric capacity (AH), electric quantity (WH) and running time
  • High Precision: Current accuracy, ±(0.8%+3 digits), resolution 0.001A; Voltage accuracy, ±(0.5%+1 digits), resolution 0.01V
  • Multiple Protection Mechanism: this portable 78.8*42.6mm(L×W) bench converter supports anti-reverse protection, OVP, OCP, OPP, LVP, OTP (the upper limit temperature is 100℃), anti-backflow at output terminal (connect the rechargeable battery directly), self-protection of power chip.
Rank No. #16
Nobsound 2018 Schumann Wave 7.83HZ Ultra-Low Frequency Pulse Generator for Relax Sleep
  • Ultra high-density non-direct coil design makes abundant quantity of magnetism without directivity, bringing balanced EM field and better sensitivity
  • Adopting anti-vibration technology to stabilize the frequency. With 4 small needles for 12mm thick high penetration of acrylic on the PCB being the most direct anti-vibration way
  • With magnetic variable technology, so Schumann intensity is like"weak - strong, strong - weak", formatting regular changes offering more comfortable experience
  • Breaking the boundaries and achieving magnetic - bit coexistence, successfully integrating the magnetic field antenna and Bit-field antenna
  • V1.3 version adding the work condition indicator (red, or frequency flashing), you can clearly see it in work condition as its indicator flashing based on its frequency, and all the indicators can be turned off, without disturbing your sleep.
SaleRank No. #17
GW Instek GFG-8020H Function Generator with 4 Digits LED Display, TTL/CMOS Output, 0.2Hz to 2MHz Frequency Range
  • Coarse and fine tuning
  • Large 0.5" LED display; built-in 4 digits counter
  • Variable DC offset control
  • Output overload protection
  • VCF Input function
SaleRank No. #18
Icstation Digital 2 Channal PWM Square Wave Pulse Signal Generator Adjustable Frequency Duty Cycle 100% 1Hz-150KHz
  • Digital square waveform generator module support 1Hz-150KHz frequency and 0%-100% duty cycle adjusting independently through the on-board momentary push button
  • Dual channel fequency signal and duty cycle complementary output, easier to control
  • DC5-30V wide voltage input(support micro USB 5V input),3 digit LED display the parameter easy to read, serial communication interface easy to connect and controlled by MCU
  • Used as square wave source for instrument testing,driving the stepper motor, PWM control the motor speed / LED light brightness
  • ❤ 1, Fulfilled by Amazon usually spend 2-4 days to delivery, and fulfilled by seller usually delivery in around 17 days ─=≡Σ((( つ̀0́)つ❤ from China, with tracking information.
    ❤ 2, We provide application consulting and replace service in case you received a defective one, please rest assured to buy it.
Rank No. #19
RoMech 30V 10A DC Power Supply Variable - Adjustable Switching DC Regulated Bench Power Supply (Stable Outputs, Alligator Leads & Spare Fuse Included)
  • ACCURATE AND RELIABLE: 3-Digit LED ±1% voltage (0-30V) and current (0-10A) outputs with coarse and fine adjustments. Reliable design with short circuit, overload, over temperature, over voltage perfections for long time usage.
  • STABLE OUTPUTS AND TWO OPERATION MODES: Stable outputs after load set up. Constant Current (C.C.) and Constant Voltage (C.V.) modes available for necessary test requirements.
  • INTELLIGENT TEMPERATURE CONTROL: Optimized heat exchanger design with built-in variable speed fan keeps the power supply cool and efficient for different load conditions.
  • WHAT’S INCLUDED: 1 x power supply, 1 x input power cord, alligator leads, 1x user manual and 1x spare fuse (inside the fuse box).
  • RoMech QUALITY COMMITMENT: We stand behind the quality of our products. If for any reason you are not satisfied with your purchase, please contact us. We provide 45-day money back and 12-month warranty. 100% Satisfaction Guarantee for risk-free shopping!
Rank No. #20
GW Instek GFG-8216A Function Generator with 6 Digit LED Display, Frequency Counter, 0.3Hz to 3MHz Frequency Range
  • Waveforms: sine, triangle, square, ramp, TTL and CMOS output
  • External voltage controlled frequency function
  • Two-steps (-20dBx2) and variable attenuator
  • It is made to accommodate the applications in audio response testing, vibration testing, servo system evaluation, ultra sound application, etc
  • Measures 251mm width by 91mm height by 291mm depth

Last update on 2020-11-20 / Affiliate links / Images from Amazon Product Advertising API

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