Shop – Ktechnics Systems https://ktechnics.com Ktechnics Systems Wed, 22 Apr 2026 09:49:41 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 5A XL4005 DC-DC Adjustable Ste… https://ktechnics.com/product/5a-xl4005-dc-dc-adjustable-step-down-module-power-supply-converter/ Thu, 19 Mar 2026 14:44:35 +0000 https://ktechnics.com/?post_type=product&p=60558 This is a XL4005 DC-DC 5A Adjustable Step Down Buck Power Supply Module. This module features the adjustable XL4005 step-down (buck) switching regulator, capable of driving a 5A load with excellent line and load regulation.

 

This XL4005 DC-DC 5A Adjustable Step Down Buck Power Supply Module has a multi-turn trim pot (potentiometer) that you can use to adjust the output voltage. Since the trim pot has 25 turns of adjustment you can easily adjust the output of the module to exactly the voltage you need.

 

The simplest way to reduce the voltage of a DC supply voltage is to use a linear voltage regulator (LDO), but linear regulators step down voltage by dissipating the excess energy as heat and do not yield any current step up. Buck converters, on the other hand, can be remarkably efficient and provide a step up in current output. Buck converters are one of the best ways to provide a regulated voltage from a battery since they don’t waste near as much energy in the process of dropping the input voltage as a linear regulator would waste.

 

Features:

  1. Wide 5V to 32V Input Voltage Range
  2. Output Adjustable from 0.8V to 30V
  3. Maximum Duty Cycle 100%
  4. Minimum Drop Out 0.6V
  5. Fixed 300KHz Switching Frequency
  6. 5A Constant Output Current Capability
  7. Internal Optimize Power MOSFET
  8. High efficiency
]]> HKD 8CH 12V RELAY USB CONTROL … https://ktechnics.com/product/hkd-8ch-12v-relay-usb-control-board/ Wed, 18 Mar 2026 10:57:59 +0000 https://ktechnics.com/?post_type=product&p=60508

The module uses HID technology and requires no drivers, plug and play. Support WIN7, XP 32-bit, 64-bit system, easy to use.

Application:

Home intelligent switch control, hotel intelligent switch, hotel intelligent electrical control, intelligent greenhouse, shopping mall intelligent switch, company plant intelligent switch, Internet cafe timing management, karaoke timing control, object network, industrial equipment, test equipment power control, street light management , intelligent management, centralized power management, etc.

  • Onboard square USB interface, stable connection
  • Use imported high performance USB control chip
  • Using a special relay to drive the chip ULN2803, the relay works more stable
  • Use genuine relay
  • Military grade PCB board production
  • Board power socket and terminal, two ways to access the power supply are convenient and flexible. When the power is connected, the relay can remain set even if the computer is turned off or the USB is removed from the computer.
  • Input voltage: DC 12V
  • Input current: greater than 300mA
  • Wiring method: NC/COM/NO
  • Relay parameters:
  • Maximum control AC 250V, 10A AC
  • Load and Maximum DC30V 10A DC load

Package includes:

  • 1 x Relay module
Enhance your home or business automation with the HKD 8CH 12V Relay USB Control Board. This plug-and-play module supports various systems and offers reliable control for lighting, appliances, and more. With military-grade PCB construction and genuine relays, enjoy stable performance and easy setup for efficient intelligent management. Perfect for smart homes, hotels, and industrial applications.
]]> 9x15cm Single-sided Prototypin… https://ktechnics.com/product/9x15cm-single-sided-prototyping-pcb-board/ Wed, 18 Mar 2026 10:18:51 +0000 https://ktechnics.com/?post_type=product&p=60494 Bakelite Material:This board uses Bakelite as its base material. Bakelite is a rigid insulating material suitable for electronic circuits.

Experimental Circuit Board:The board is designed for experimental circuit projects. It supports soldering and testing of electronic components.

Single-Sided Copper Plate:The board features a single-sided copper plate. This means copper traces are on one side only for circuit connections.

Prototype PCB Board Size:The board measures 9 × 15 cm (3.54 × 5.91 in). It provides a standard size for prototype circuit assembly.

]]> 9x15cm Double-sided Prototypin… https://ktechnics.com/product/9x15cm-double-sided-prototyping-pcb-board/ Wed, 18 Mar 2026 10:13:32 +0000 https://ktechnics.com/?post_type=product&p=60491 Dimension : 9×15 cm / 2.7×3.5 inch (W x L)
Hole ( row x column ) : 31 x 26
Material : glass fiber FR4
Metal : Tin-plate
Thickness : approx. 1.6mm
Hole Pitch : approx. 2.54 mm
Hole Diameter : approx. 1 mm

]]> FT232RL FT232 USB to UART TTL … https://ktechnics.com/product/ft232rl-ft232-usb-to-uart-ttl-usb-mini-b/ Mon, 09 Mar 2026 08:51:35 +0000 https://ktechnics.com/?post_type=product&p=60315
  • The FT232R is a USB to serial UART interface
  • A low-cost way to add USB capability to microcontrollers. Use this to give your own breadboard For USB capability for bootloading or downloading sketches.
  • RXD/TXD transceiver communication indicator
  • Includes over-current protection, using a 500ma self-restoring fuse
  • This board includes a DTR pin needed to auto-reset when downloading to your device.
  • Color: Red
  • USB Power Supply: 3.3V or 5V
  • Size:43*17mm
    • ]]>         ATTINY85 Digispark Development… https://ktechnics.com/product/attiny85-digispark-development-board/ Tue, 20 Jan 2026 08:31:21 +0000 https://ktechnics.com/?post_type=product&p=58990

    The Digispark is an Attiny85 based microcontroller development board similar to the Arduino, only cheaper, smaller, and a bit less powerful. With a whole host of shields to extend its functionality and the ability to use the familiar Arduino IDE the Digispark is a great way to jump into electronics, or perfect for when an Arduino is too big or too much. It can be programmed on the Arduino IDE with Arduino compatible code. It is perfect for use in projects where the Arduino UNO/Nano are too big and minimal IO pins and functionality are required. The Digispark is available in two variants -with USB Connector and without USB Connector. This board comes without the USB Connector is is suitable for projects which require a small PCB. Being a very popular platform, multiple tutorials, guides and sample codes are available on the internet which help you get your projects running with it. The Digispark is shipped fully assembled except for the two included and easy to solder headers. Here are the specs:

    Specifications:

    • Support for the Arduino IDE 1.0+ (OSX/Win/Linux)
    • Power via USB or External Source – 5v or 7-35v (12v or less recommended, automatic selection)
    • On-board 500ma 5V Regulator
    • 6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB)
    • 8k Flash Memory (about 6k after bootloader)
    • I2C and SPI (vis USI)
    • PWM on 3 pins (more possible with Software PWM)
    • ADC on 4 pins
    • Power LED and Test/Status LED
    ]]>         Voltage Adjustable DC-DC Buck … https://ktechnics.com/product/voltage-adjustable-dc-dc-buck-boost-power-converter-module/ Tue, 20 Jan 2026 08:14:19 +0000 https://ktechnics.com/?post_type=product&p=58987 This is an automatic Buck- Boost Converter. As a result, the output voltage of the module can be fixed at a specific voltage, and the input can be higher or lower than the output voltage. The onboard variable resistor is used to change the output voltage.

    Technical Details

    • Automatic Buck Boost Converter
    • Output Current: 4A
    • Switching Frequency: 400KHz
    • Input Voltage: 3.8V to 32V
    • Output Voltage: 1.25V to 35V
    • Conversion Efficiency: <94%
    • Non-Isolated Buck-Boost Converter

    Features

    • Wide input voltage range: 3.8V to 32V
    • Adjustable output voltage: 1.25V to 35V
    • High efficiency up to 94%
    • 4A high-output current capacity
    • 400KHz high switching frequency
    • Built-in overheating and short-circuit protection
    • Compact and lightweight design
    • Ideal for battery-powered applications
    • Non-isolated power conversion

    Applications :

    • Battery Management: Voltage regulation for battery-powered devices.
    • Solar Power Systems: Stabilizes voltage from solar panels.
    • DIY Electronics: Ideal for hobbyists and custom circuit projects.
    • LED Power Management: Powers LED strips and lighting systems.
    • Embedded Systems: Provides stable power for microcontrollers and IoT devices.
    • Industrial Automation: Used in control circuits and automation systems.

    Physical Attributes

    • Length × Width × Height(mm) : 47.5 * 25 * 12
    • Weight (gm): 16
    ]]>         3S BMS 11.1V 12.6V 25A W/Balan… https://ktechnics.com/product/3s-bms-11-1v-12-6v-25a-w-balance-18650-li-ion/ Tue, 20 Jan 2026 08:08:44 +0000 https://ktechnics.com/?post_type=product&p=58984 Feature:

    Over voltage range: 4.25-4.35v±0.05v
    Over discharge voltage range: 2.3-3.0v±0.05v
    Maximum operating current: 0-25A
    Maximum transient current: 34-40A
    Quiescent current: less than 30uA
    Internal resistance: less than 100mΩ

    Working temperature: -40—+50℃
    Storage condition: -40– +80℃
    Effective life: more than30000h
    Short circuit protection: Yes, delayed self recovery
    Size: about 56mm*45mm*1.2mm

    Precautions:

    Strictly according to the diagram wiring: 0V(B-)3.7V(B1)7.4V(B2)11.1V(B+), Do not deliberately short circuit.
    After the line is connected, Need to charge first, then have output.
    When the battery is connected in series with 3 groups, Please ensure that the voltage of each battery is the same. If not same, please fill in each set of batteries and then use.
    Do not mix the good battery and the battery.
    The capacity of the battery internal resistance is closer will be better.
    Attention: Do not mix the good battery and poor battery to use. The internal resistance of 3 battery capacity are closer will be better. Please buyers know the professional knowledge of this module before buying

    ]]>         NE555 Adjustable Frequency Pul… https://ktechnics.com/product/ne555-adjustable-frequency-pulse-generator-module/ Tue, 30 Dec 2025 08:23:37 +0000 https://ktechnics.com/?post_type=product&p=58596 The NE555 Adjustable Frequency Pulse Generator Module is a versatile and reliable component designed to generate precise pulse waveforms for a wide range of applications. It utilizes the NE555 timer IC, offering high stability and accuracy. This module is ideal for creating adjustable square wave signals, which can be used in motor speed control, LED brightness control, signal testing, and more.

    NE555 Adjustable Frequency Pulse Generator Module Features:

    • Adjustable Frequency: Easily adjust the output pulse frequency using the onboard potentiometer.
    • Wide Frequency Range: Supports a wide range of frequencies, making it suitable for various applications.
    • Stable Output: Ensures consistent and reliable pulse generation.
    • User-Friendly Design: Equipped with terminal blocks and a clear layout for easy connections.
    • Compact Size: Small and lightweight for integration into compact projects.

    NE555 Adjustable Frequency Pulse Generator Module Specifications:

    • IC Used: NE555 Timer
    • Operating Voltage: 5V–12V DC
    • Output Signal Type: Square wave
    • Frequency Range: 1Hz to 100kHz (adjustable)

    Package Includes:

    1 x NE555 Adjustable Frequency Pulse Generator Module

    ]]>         BMS 4S 3.7V 8A Lithium Battery… https://ktechnics.com/product/bms-4s-3-7v-8a-lithium-battery-charge-protection-board-14-8v-20a-current-limit/ Fri, 21 Nov 2025 08:39:53 +0000 https://ktechnics.com/?post_type=product&p=57940

    ]]>