Best Knacro in 2026

Voltage test range: DC 6.5~100V; Current test range: 0~20A;

Store energy data when power off(can be reset to 0).

Large-screen LCD (display voltage, current, active power, energy at the same time).

Using high-quality components, intelligent dual IC program control circuit, chip motherboard design

Charger with the flow, overcharge, short circuit, lightning, temperature, pressure, electromagnetic field protection and other functions, constant current output, full stop automatically.

12.6V 1A lithium battery charger for the aircraft model aircraft, remote control airplanes, electric cars and other toy model aircraft / toys polymer battery pack.

This product can be used as a square wave signal generator, generate square wave signals for experimental use, can also be used to generate stepper motor drive square wave signal. Generate adjustable pulse for MCU use. Produce adjustable pulse control circuit.

Main chip: N5555;

Input voltage: DC5-15V; 5V power supply, the output current of about 15mA; 12V power supply, the output current of about 35mA .

Direct current ripple is small, the work efficiency is high;

Plug Type:5.5mm x 2.5mm,Output wire Length:2.95ft.

Wide input voltage range 100-240V,symbol global use standard;

Using high-power relay, the maximum control load DC 30V 30A / AC 250V 30A;

With each optocoupler isolation, anti-interference ability.

In line with international safety standards, the control area and the load area with isolation slot.

This DC to Dc converter module support 6-40V wide range voltage input and DC 5V 3A output.

It has high power conversion efficiency up to 92%.

It is equipped with Single USB port, can be used as a DIY USB charger for your power bank, smart phones, tablet, etc.

overcharge detection voltage :4.25 ± 0.025V(Stop charging, When 1 of 3 battery out voltage> 4.25 ± 0.025V)

over discharge detection voltage :2.50 ± 0.08V(Stop out, When 1 of 3 battery out voltage < 2.5V)

Operating Current: 15A (natural cooling 10A, additional heat sink 15A, the maximum instantaneous current of 30A)

This Relay controller is compatible with a variety of operating modes, LED digital tube displays, procedures for intelligent control, to achieve the timing relay functions, the voltage control function, and voltmeter functions, applies to automatic control field, product testing, DIY etc.

This product is designed to meet electrical safety rules, with industrial reliability, it meet a variety of control requirements at lowest cost.

External signal input: (5~ 12V) or passive switch (9 levels delay time can be set);

It can be connected: Lithium batteries, nickel hydrogen batteries, nickel cadmium batteries.

Press TYPE key to select LIPO (lithium polymer battery), LIFE (lithium-iron battery), LI-ION (Lithium Ion Battery) three kinds of lithium batteries.

Press the key to sequentially display each piece of CELL battery voltage and remaining battery capacity.

This is a perfect choice if you are in need of a rugged push button! These metal push buttons are a very tough, small, panel-mount latching switch with an illuminated Green LED Ring.

It is a SPDT with 16mm threading and 1mm pitch. This button is perfect for basic On/Off functions with cable length 1m / 3.3ft.

These latched buttons are rated up to 5A and 250V AC while the LED is rated for 3-6V.

This product is a data logger that can record data on a memory card via the UART serial interface. This function is similar to a black box to record the data sent to the serial port by the master device and to save the data in memory on the memory card.

This product can be used with Cleanflight firmware with the control board, connected to the corresponding serial port, through the host computer software cleanflight configurator settings, can be realized on the UAV's important operating data recorded on the memory card. And the flight record playback analysis via the "Blackbox flight data recorder" software.

Note: After inserting the memory card for the first time, the "config.txt" file will be produced on the memory card, which will change the baud rate parameter of the serial port. This parameter can be modified. Please set the remote control or main circuit The baud rate of the serial port is consistent with the baud rate of the recorder.

FOUR SMART PROTECTIONS: embeded Smart Chips provide 4 protection-Overcurrent Protection/Overheated Protection/Short Circuit Protection/High Voltage Protection

HIGH CONVERSION EFFICIENCY: Synchronization Rectification Technology-multiple intelligent protection function with high conversion efficiency and stability. The conversion efficiency may reach 96%.

SMT PROCESSING: SMD Units,such as FR-4 multilayer PCB,resistance,capacitor, provide higher integration level/reliability/stability.

FOUR SMART PROTECTIONS: embeded Smart Chips provide 4 protection-Overcurrent Protection/Overheated Protection/Short Circuit Protection/High Voltage Protection

HIGH CONVERSION EFFICIENCY: Synchronization Rectification Technology-multiple intelligent protection function with high conversion efficiency and stability. The conversion efficiency may reach 96%.

SMT PROCESSING: SMD Units,such as FR-4 multilayer PCB,resistance,capacitor, provide higher integration level/reliability/stability.

Operating Voltage: 5V

A single module can drive a 8x8 dot matrix common cathode

Dimensions: 12.8X12.8X1.3 cm

Working current:3W+3W

Mounting:3.0mm

Speaker type:3W*2 4-8ohm

4-series lithium battery protection board, suitable for 14.4V/14.8/16.8V lithium battery Pack.

Has overcharge protection, over-discharge protection, short circuit protection and over-current protection.

With automatic activation function, automatically cancel the protection after protection conditions recovery.

Input voltage: DC10-60V.Output voltage: Load Linear.

Input Current: require large than the motor operating current.Output Current: determine load size.Continuous current: 70A within.

Maximum power: 4000W .Quiescent Current: 0.01ma.

AMP & VOLT DUAL SIGNAL GENERATOR: Multifunctional KNACRO signal generator kit is able to generate ampere & voltage by one module, which generate 0/4 - 20mA current signal and 0-10V voltage signal just by rotating a multi-cycle precise potentiometer, simple and handy.

CLEAR LED DISPLAY: Our generator has bright and clear 3-digit LED digital display screen, which can be used to monitor the output current and voltage. You just need to push the switch below the monitor easy to switch the display.

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 display value of current voltage by yourself.

Input voltage: DC 6-60V.Output voltage: Load Linear.

Input Current: require large than the motor operating current.Output Current: determine load size.

Continuous current: 20A within.Maximum power: 1200W .Quiescent Current: 0.01ma.

Small size, 50 * 30 * 15mm (does not include potentiometer handle), only the width of two fingers.

Power, easy to drive 100-300W stage sound without distortion.

Transparent sound quality, high SNR, analytical ability, wide dynamic range. With output short circuit protection, immediately resume normal work after troubleshooting

The PWM digital signal is converted to 0-10V analog signal. Can be used for PLC or other industrial control panel of the signal interface switch.

PWM signal receiving frequency range: 1KHZ-3KHZ;

PWM signal input level range: 4.5V to 10V level, jump cap plug in the 5V, the level of the signal is mainly for conventional industrial control card (such as MACH3 board), 5V CPU interface; 12 to 24V level, jump cap inserted at 24V, the level of the signal is mainly for conventional PLC interface.

Output capacity: AC 250V / 30A, DC 30V / 30A or less.

Using ultra-small optocoupler, anti-interference ability, stable performance

9.5mm black fence terminal block, standard 30A terminal, stable and reliable, reliable quality

Input voltage: DC6-60V.Output voltage: Load Linear.

Input Current: require large than the motor operating current.Output Current: determine load size.Continuous current: 20A within.

Maximum power: 1200W.Quiescent Current: 0.01ma.

Connect more devices easily & quickly to your computer. It no need driver. Size:19.2 x3.4 cm approx.

Gold plated contacts for best connectivity and long life.

Install PCI-E device freely according to dimension and position of computer case.

High quality electrolytic capacitors 2 2200uf / 25V rectifier to do, low-pass filtering to enlarge dual op amp NE5532

Welded 8P op amp IC Block, easy to replace the op amp to enhance playability, CBB capacitance capacitors are original, high-quality sealed potentiometers potentiometer.

There are LED lights, real-time monitoring the power supply situation. Input voltage: positive and negative dual power input AC 12v to 15v can be.

The AD9850 is a highly integrated device that uses advanced DDS technology coupled with an internal high speed, high performance, D/A converter and comparator, to form a complete digitally programmable frequency synthesizer and clock generator function.

When referenced to an accurate clock source, the AD9850 generates a spectrally pure, frequency/ phase-programmable, analog output sine wave. This sine wave can be used directly as a frequency source or converted to a square wave for agile-clock generator applications. The AD9850’s innovative high speed DDS core provides a 32-bit frequency tuning word, which results in an output tuning resolution of 0.0291 Hz, for a 125 MHz reference clock input.

The AD9850’s circuit architecture allows the generation of output frequencies of up to one-half the reference clock frequency (or 62.5 MHz), and the output frequency can be digitally changed (asynchronously) at a rate of up to 23 million new frequencies per second. The device also provides fivebits of digitally controlled phase modulation, which enables phase shifting of its output in increments of 180°, 90°, 45°, 22.5°, 11.25° and any combination thereof.

Voltbeat technology and continuous self-test - so you always know it is working

Upon detection, tip glows and beeper sounds

CAT IV 1000 V for added protection

Voltbeat technology and continuous self test so you always know it is working

Upon detection, tip glows and beeper sounds

20 volt to 90 volt AC control circuit model also available

Versatile Digital Multimeter - Accurately measures AC/DC Current, AC/DC Voltage, Capacitance, Frequency, Duty Cycle, Resistance, Diode, Continuity and Temperature

Thoughtful Design - Support Data Hold, Large LCD Backlit Screen, Auto Shut-off and Hanging Magnet, and Kickstand make the process of measurements easier. Professional level is reflected in some features include Auto-Ranging capability, and True RMS for measuring both AC Current and Voltage

Suitable For Many Occasions - This Multimeter is a golden partner to help to troubleshoot a variety of automotive and household electrical problems safely and accurately.