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Note: This logic level shifter breakout comes with loose headers. You will have to solder them yourself.

If you have ever tried to connect a 3.3V device to a 5V system, you know what a challenge it can be! The logic level converter is a small device that safely steps down 5V signals to 3.3V AND steps up 3.3V to 5V at the same time. Each level converter can convert 4 pins on the high side to 4 pins on the low side, with power supply pins on each side.

The usage of the level converter is very straightforward. The board needs to be powered from the two voltage sources (high voltage and low voltage) that your system is using. High voltage (5V for example) to the "HV" pin, low voltage (3.3V for example) to "LV", and ground from the system to the "GND" pin.

This module requires you to supply it with power from both the higher voltage level and the lower voltage level. Connect the higher voltage source to pin "HV" and its ground to pin "GND" near the "HV" pin. Also, connect the lower voltage source to pin "LV" and its ground to pin "GND" near the "LV" pin.

For example, if you were connecting your Arduino (5V signals) to an ESP8266 (3.3V signals), you would connect the "HV" pin on the module to the 5V supply pin on your Arduino and the "GND" pin near the "HV" pin to the "GND" pin on your Arduino. Then, you would connect the "LV" pin on the module to the 3.3V power source that is supplying power to the ESP8266 and connect the "GND" pin near the "LV" pin to the 3.3V power supply's ground. You would then connect the signal pin from your Arduino to one of the signal pins on this module (for example, pin "HV1"), and then you would connect the desired signal pin on the ESP8266 to the corresponding pin on this module ("LV1" if the higher voltage signal is connected to "HV1").

These are 4 Channel devices (works great for I2C or SPI) and will work with all microcontrollers, Arduino, Raspberry Pi, Intel Edison, etc. Use this module to connect two devices of different digital voltage levels. For example: connecting an Arduino (5V device) to an ESP8266 (3.3V device).

The logic level converter comes complete with loose header pins and can be used directly on a breadboard.

This Black Aluminium case is designed to passively cool and protect your Raspberry Pi Zero 2 W and Zero 2 WH  

Features

• Colour: Matte Black
• Material: Aluminum Alloy
• Use for Raspberry Pi Zero 2 W and Zero 2 WH 

What's in the box?

1 x 2 parts Black case for RPi Zero W
1 x Screw set with thermal pads

The LD2410C is a high-sensitivity 24GHz millimeter-wave (mmWave) radar module designed for advanced human presence detection. Unlike traditional PIR sensors that only detect movement, this FMCW (Frequency-Modulated Continuous Wave) radar can sense the tiny chest movements of a stationary person (breathing), making it the ultimate solution for "smart room" occupancy.

Why choose mmWave over PIR?

• Stationary Presence: Detects sitting, standing, and even lying down. Your lights will never turn off while you're reading or watching TV again.
• Environmental Immunity: Not affected by temperature, light, smoke, or humidity.
• Invisible Installation: The radar can penetrate plastic shells and glass, allowing it to be hidden inside a project box or behind a thin wall for a clean aesthetic.

Key Features

• Long-Range Sensing: High-precision detection up to 5–6 meters.
• Wide Coverage: Broad ±60° detection angle ensures full room coverage.
• Smart Tuning (Bluetooth & Serial): Easily configure "Gate" sensitivity, distance zones, and delay times via the HLKRadarTool App (iOS/Android) or a serial debugging tool.
• Fine-Grained Zones: Divide the sensing range into intervals and shield interference from objects outside the target area (e.g., a fan or a window).
• Compact Design: Ultra-small footprint (16mm x 22mm) for easy integration.
• Wide Voltage Support: Reliable performance with a 5V to 12V power supply.

Technical Specifications

• Operating Frequency: 24GHz (ISM Band)
• Detection Type: Motion, Micro-motion (Breathing), and Stationary Presence
• Voltage: 5V – 12V (Average current ~80mA)
• Output: High/Low GPIO (3.3V Logic) and UART Serial (256,000 baud)
• Mounting: Supports Ceiling or Wall mounting
• Regulations: FCC and CE compliant

Ideal Applications

1. Smart Lighting: Energy-saving control for homes and offices.

2. AIoT Wake-up: Automatically wake up advertising screens or tablets when a person approaches.

3. Safety & Security: Detect intruders or prevent UV lamps from turning on while people are present.

4. Smart Appliances: Power down TVs or Aircons when a room is truly unoccupied.

What's in the box?

1 x LD2410C Human Presence Sensor Module (Bluetooth Enabled)

Resources

• Arduino Library

Pro-Tip for Home Assistant Users: This module is fully compatible with ESPHome. By connecting the TX/RX pins to an ESP32, you can bring real-time distance and occupancy data directly into your dashboard with no complex coding required.

from gpiozero import DigitalInputDevice
from signal import pause

# LD2410C OUT pin connected to GPIO 4
sensor = DigitalInputDevice(4)

def person_detected():
    print("Presence Detected! (Stationary or Moving)")

def room_empty():
    print("Room is now empty.")

sensor.when_activated = person_detected
sensor.when_deactivated = room_empty

pause()

pip install aio-ld2410

import asyncio
from aio_ld2410 import LD2410

async def main():
    # /dev/ttyAMA0 is the default hardware serial port on Pi
    async with LD2410('/dev/ttyAMA0') as device:
        print("Connected to LD2410C")
        async for report in device.get_reports():
            print(f"Target: {report.target_state}")
            print(f"Moving Distance: {report.moving_target_distance}cm")
            print(f"Static Distance: {report.static_target_distance}cm")

asyncio.run(main())

Features

• Versatile Voltage Range: This photosensitive sensor module operates effectively within a supply voltage range of DC 3.3-5V, making it suitable for various applications and systems requiring different power levels.
• Sensitive Light Detection: Utilizing a highly sensitive photoresistor sensor, the module can accurately detect ambient light intensity, triggering microcontrollers or relay modules to respond appropriately to changing light conditions.
  
• Adjustable Brightness Sensitivity: Featuring an adjustable potentiometer, users can easily fine-tune the sensitivity of light detection, allowing for customized performance based on specific environmental requirements.
• Clear Signal Output: The module provides a clean digital output signal with strong driving capability exceeding 15mA,reliable communication with microcontrollers for precise monitoring of light levels.
• Easy Installation: The module features screw mounting holes for easy installation and includes a power indicator for quick status checking, enhancing usability in a variety of settings.

Specifications

• Part Name: Light Sensor Module
• Material: PCB
• Size: 32 x 14 mm
• Colour: Blue

What's in the box?

1 x Photosensitive Sensor Module
 

NFC NTAG213 tag stickers are small adhesive tags that use Near Field Communication (NFC) technology to wirelessly transfer data when placed close to a compatible device, like a smartphone. The NTAG213 chip is specifically designed for simple and versatile NFC applications, featuring a memory size of 144 bytes and operating at a frequency of 13.56 MHz. These stickers are popular for a wide range of applications, including:

1. Smart Home Automation: Can be placed on objects or around the house to trigger actions on NFC-enabled smartphones, such as turning on lights or setting up scenes.
  
2. Contactless Sharing: Used for storing small amounts of information like URLs, contact information, or Wi-Fi credentials, making it easy to share with others by tapping a smartphone.

3. Inventory and Asset Management: Can be used in retail, warehouses, or offices for tracking items, verifying authenticity, or updating inventory records quickly with a mobile device.

4. Marketing and Event Management: Often used in events, businesses, or museums where visitors can tap their phones on the sticker to get more information about an exhibit, product, or promotion.

5. Access Control: Can be programmed to unlock doors or perform secure actions when authenticated with compatible devices.

These tags are typically very affordable, making them a popular choice for many personal and business-related NFC applications.

What's in the box?

10 x 13.56MHz RFID stickers

The Ferrule Kit can tidy up your wire ends and make it easy to use with other electrical headers and terminals, especially in industrial applications. The kit comes with a total of 1200 pieces for 8 different wire sizes so that you have plenty of options to tidy up your wire ends.

You will find the rest of our lugs selection here

To use the Ferrule Kit, you need to use a Crimping Plier. So you can use the below HSC6-6 Crimping Plier with your Ferrule Kit. This crimping plier comes with a hexagonal crimper and adjustable pressure regulator. It is also designed to have a soft ergonomic handle for a comfortable grip.

What's in the box?

1200 x terminals (lugs)

Resources

This continuous rotation servo converts standard RC servo position pulses into continuous rotation speed. The default rest point is 1.5 ms, but this can be adjusted by using a small screwdriver to turn the middle-point adjustment potentiometer. Pulse widths above the rest point result in counterclockwise rotation, with speed increasing as the pulse width increases; pulse widths below the rest point result in clockwise rotation, with speed increasing as the pulse width decreases.

Specifications

• Product model: SG90
• Colour: Blue
• Dimensions: 22.8 x 22.4 x 12mm
• Rotation Angle: 360°( Continuous rotation)
• Operating Speed: 0.1 second/ 60 degree(4.8V).
• Gear Medium: NylonOperating
• Mode: AnalogControl
• Signal: PWMStall
• Torque: 1.5kg/cmTemperature
• Range: 0 ℃- 55 ℃
• Dead Band Width: 10usec.
• Operating Voltage: 4.8VPlug
• Connector Wire Length: 250mm(Brown: Negative; Red: Positive; Orange: Pulse Input)
• Accessories: Multi-arm, Fixing screws
• Application: Mini Car / Mini Ship / Helicopter & Airplane
• Steering Gear Control: The control of the steering gear generally requires a time base pulse of about 20ms, and the high level part of the pulse is generally the angle control pulse part in the range of 0.5ms~2.5ms.

Servo 360 Degree - The steering gear is actually equivalent to a geared motor with infinitely variable speed, which can control the speed and direction of the rotation. There is no 0-360 degree angle control function.

What's in the box?

1 x Micro 360 Degree Continuous Rotation Servo

This Multifunctional Smart Meter is a compact, all-in-one solution designed for real-time tracking of power metrics. Whether you're managing an control panel, a DIY solar setup, or monitoring home appliance efficiency, this meter provides the data you need at a glance.

Comprehensive Data Monitoring

Track six essential electrical parameters simultaneously on a single, high-clarity display:

• Voltage (V)

• Current (A)

• Active Power (W)

• Frequency (Hz)

• Power Factor (PF)

• Total Energy Consumption (kWh)

What's in the box?

1 x Multifunctional Smart Meter

Rocker Switches house a button for operation that can be pressed on either end like a seesaw to connect or disconnect an electrical circuit. They are often used as ON/OFF switches on the main power supplies for electronic devices.


Specifications

• 250 V
• 3A
• 21mm x 15mm at the top
  
  

What's in the box?

1 x Rocker Switch

Resources

Python library
Introduction to Buttons and Switches
Types of buttons and switches

Please note: Servo is not included with this product

Elevate your robotics and mechanical projects with our High-Strength Metal Servo Arm, engineered specifically for high-torque applications. Whether you are building an industrial prototype or an advanced classroom project, this component provides the rigid connection necessary for precision movement.

Key Features

• Perfect Compatibility: Designed specifically for use with MG995 Servo Motors (and other standard 25T spline servos), ensuring a snug, slip-free fit.
• Maximum Durability: Made of high-strength metal components, this arm won't flex or stripped under pressure like standard plastic alternatives.
• Project Ready: Ideally suitable for educational science kits, DIY robotics, and STEM curriculum where reliability and longevity are essential.

What's in the box?

1 x Servo controlled Robotic Mechanical Claw

Resources

PLEASE NOTE: Misusing or mishandling a lithium-ion battery may cause a FIRE or EXPLOSION which can result in INJURY or DEATH.

PD 20W LCD fast universal battery charger with professional discharge capacity testing function, capable of displaying capacity. The 18650 battery charger is suitable for 3.7V lithium batteries and 1.2V Ni MH Ni CD AA AAA batteries

You will need a suitable USB-C Power supply for this charger. We suggest our 27W power supply.

What's in the box?

1 x Liitokala Lii-402 Micro USB 4Slots Battery Charger
1 x USB-C male to USB A male Cable 

You will also need a power supply for this charger or plug it into another device like your laptop or PC

These clips are great for protecting your fingers whilst assembling sewing projects. Why limit yourself to fabric though, we could also see them coming in useful for papercraft projects, taming uncooperative cables or combining with some string to make a snazzy photo display.

They come in a handy storage tub with 100 clips in a mix of 8 colours (pink, red, orange, yellow, green, blue, purple and clear). The flat side of the clips has guide markings 5, 7 and 10mm in from the edge, which helps keep your seams precisely lined up.

Specifications

• Width: 10mm
• Length: 27mm
• Clip thickness (fully open): approx. 90mm

What's in the box?

1 x tub of 100 clips

Add touch control to your electronics projects in seconds! The BMT Capacitive Touch Module is a "plug-and-play" sensor that works just like a smartphone screen. With just three pins (VCC, GND, and Signal), it is incredibly easy to wire to any microcontroller. It replaces old-fashioned clicky buttons with a modern touch surface that never wears out. Perfect for school projects, smart mirrors, and custom LED controllers!

Features

• Touch sensor module sensor
• When touching, S outputs a high; touch again, S will output low
• Power Range: 3-5V
• Current: 5MA
• Interface: G (GND), V (vcc), S (signal)

What's in the box?

1 x TTP223B Touch Sensor Module

The 4-pin TCRT5000 module is significantly more versatile than the 3-pin version because it provides both a Digital Output (D0) and an Analog Output (A0).

The Digital pin is perfect for "Yes/No" detection (like staying on a line), while the Analog pin allows you to see the intensity of the reflection, which is useful for measuring varying shades of gray or very small changes in distance.

Features 

• Compatibility: Perfectly designed for Arduino projects, ensuring seamless integration and operation.
• Advanced Sensing: Utilizes IR technology with TCRT5000 sensors for accurate detection of reflective materials or barriers.
• Easy to Use: Simplified setup, suitable for beginners and professionals alike.
• Versatility: Ideal for a wide range of applications including line tracking robots, object detection, and automatic control systems.
• Optimized Design: Compact form factor for efficient performance.

Specifications

• Colour: Blue
• Material: ABS

Due to different batches, there may be differences in product printed text, which will not affect use.

What's in the box?

1 x Infrared Reflective Sensor

Resources

from gpiozero import DigitalInputDevice
from signal import pause
# TCRT5000 D0 is connected to GPIO 17
# pull_up=True because the sensor output is Active Low
sensor = DigitalInputDevice(17, pull_up=True)

def detected():    
   print("Reflection Detected! (LED on module should be lit)")

def cleared():    
   print("Reflection Lost.")

sensor.when_activated = detected
sensor.when_deactivated = cleared

print("Starting TCRT5000 Digital Test...")
pause()

from gpiozero import MCP3008
import time

# Create a reference to the Analog sensor on Channel 0 of the ADC
reflectivity = MCP3008(channel=0)

while True:    
   # Value will be between 0.0 (no reflection) and 1.0 (max reflection)    
   print(f"Reflection Intensity: {reflectivity.value:.2f}")    
   time.sleep(0.1)

Carbon dioxide is a critical indicator of indoor air quality that can affect human cognitive
abilities and well-being. The SCD40/SCD41 are Sensirion's next-generation miniaturized CO2 sensors, offering high precision and cost-effectiveness. These modules feature a 2.54mm pitch pin header interface for power supply and communication connections. On-chip temperature and humidity compensation is achieved through built-in sensors for humidity and temperature measurement. The SCD40/SCD41 can intelligently regulate indoor ventilation systems based on C02 concentration levels, thereby maintaining a healthy and efficient environment with low C02 levels over time. This makes the SCD40/SCD41 ideal for applications focused on improving indoor air quality.

Features

• 2.4-5.5V
• Detects CO2 Carbon Dioxide 400-2000ppm
• Detects Temperature 
• Detects Humidity
• I2C Communication

Specifications

• Reference Accuracy and Range: SCD40: 400-2000 ppm
• Supply Voltage Range: 2.4-5.5 V
• High Accuracy: ±(40 ppm + 5%)
• Digital Interface: 12C
• Integrated Temperature and Humidity Sensor
• Low Power Consumption
• Typical Accuracy 50ppm +-5% reading
• Pin Definitions
  GND: Ground input terminal
  VDD: Positive power supply input terminal
  SCL: 12C clock terminal
  SDA: 12C data terminal

What's in the box?

1 x SCD40 sensor

Resources

# It is recommended to use a virtual environment on the Pi 5mkdir co2_project && cd co2_projectpython3 -m venv .venvsource .venv/bin/activate# Install the librarypip3 install adafruit-circuitpython-scd4x
 
4. Python Example Code

import timeimport boardimport adafruit_scd4x# Initialize I2C bus and sensori2c = board.I2C()scd4x = adafruit_scd4x.SCD4X(i2c)print("Serial number:", [hex(i) for i in scd4x.serial_number])# Start the sensor's internal measurement cyclescd4x.start_periodic_measurement()print("Waiting for first measurement (takes ~5 seconds)...")try:    while True:        if scd4x.data_ready:            print(f"CO2: {scd4x.CO2} ppm")            print(f"Temperature: {scd4x.temperature:.1f} °C")            print(f"Humidity: {scd4x.relative_humidity:.1f} %")            print("-" * 20)        time.sleep(2)except KeyboardInterrupt:    # Important: Stop measurements to save power/sensor life    scd4x.stop_periodic_measurement()    print("Measurements stopped.")
 
Key Differences for SCD41 Users

Carbon dioxide is a critical indicator of indoor air quality that can affect human cognitive
abilities and well-being. The SCD40/SCD41 are Sensirion's next-generation miniaturized CO2 sensors, offering high precision and cost-effectiveness. These modules feature a 2.54mm pitch pin header interface for power supply and communication connections. On-chip temperature and humidity compensation is achieved through built-in sensors for humidity and temperature measurement. The SCD40/SCD41 can intelligently regulate indoor ventilation systems based on C02 concentration levels, thereby maintaining a healthy and efficient environment with low C02 levels over time. This makes the SCD40/SCD41 ideal for applications focused on improving indoor air quality.

Features

• 2.4-5.5V
• Detects CO2 Carbon Dioxide 400-5000ppm
• Detects Temperature 
• Detects Humidity
• I2C Communication

Specifications

• Reference Accuracy and Range: SCD40: 400-5000 ppm
• Supply Voltage Range: 2.4-5.5 V
• High Accuracy: ±(40 ppm + 5%)
• Digital Interface: 12C
• Integrated Temperature and Humidity Sensor
• Low Power Consumption
• Typical Accuracy 50ppm +-5% reading
• Pin Definitions
  GND: Ground input terminal
  VDD: Positive power supply input terminal
  SCL: 12C clock terminal
  SDA: 12C data terminal

What's in the box?

1 x SCD41 sensor

Resources

# It is recommended to use a virtual environment on the Pi 5mkdir co2_project && cd co2_projectpython3 -m venv .venvsource .venv/bin/activate# Install the librarypip3 install adafruit-circuitpython-scd4x
 
4. Python Example Code

import timeimport boardimport adafruit_scd4x# Initialize I2C bus and sensori2c = board.I2C()scd4x = adafruit_scd4x.SCD4X(i2c)print("Serial number:", [hex(i) for i in scd4x.serial_number])# Start the sensor's internal measurement cyclescd4x.start_periodic_measurement()print("Waiting for first measurement (takes ~5 seconds)...")try:    while True:        if scd4x.data_ready:            print(f"CO2: {scd4x.CO2} ppm")            print(f"Temperature: {scd4x.temperature:.1f} °C")            print(f"Humidity: {scd4x.relative_humidity:.1f} %")            print("-" * 20)        time.sleep(2)except KeyboardInterrupt:    # Important: Stop measurements to save power/sensor life    scd4x.stop_periodic_measurement()    print("Measurements stopped.")
 
Key Differences for SCD41 Users