Elecfreaks

1 Channel Relay 3V Relay Module is one of the OCTOPUS series of electric bricks. It is fundamentally designed according to OCTOPUS electric brick series with same shape, PCB positioning holes and electric brick connectors. OCTOPUS 1 Channel Relay has adopted a mini and high-quality HUIKE relay, which is available to control all kinds of home appliances and high current load devices. This is a common accessory module for electronic DIY fans.

FEATURES

Equipped with a high current relay. Its max current can be up to 2A.

Adopt a 3V power supply, which is enough to support micro:bit.

Contact control, including a normally open contact and a normally closed contact.

Convenient wire connection.

360 Digital Servo(EF90D) with wheel and tire is a kind of 360° analog servo. It is light and portable, a little bigger than 5 cent coin. It works at 3V voltage and uses pulse width to adjust speed of the servo rotation, which also can be used to make small robot modules, mechanical arm modules and intelligent car modules.

Contents:

EF90D micro:servo 360 degrees digital servo for micro:bit

Wheel

Alligator clips (or Crocodile clips, if you prefer) are likely to be the most useful thing on your workbench besides the workbench itself. Whether you're just trying to make a few quick connections to test your circuit or having trouble making your multimeter leads stay where you need them, these spring-loaded clips are a workshop must-have.

Each lead in this pack of 3 is 35cm long with a rubber shrouded alligator clip in 45mm length and 8.3mm opening on each end. There are three different colours, you get each of: red, black and yellow.

White Solderless Prototype PCB Board Breadboard 400 Tie-points 83mmx55mm

Micro:bit breakout board is a kind of breakout board for micro:bit. It can lead out GPIO port, serial port, IIC port, and SPI port on the micro:bit board. The biggest feature of Octopus:bit is that it can switch electric levels for some GPIO ports, which makes micro:bit available to be adapted to 5V sensors.

FEATURES

Input voltage: 3.3V（powered by the edge connector of micro:bit）

Extend all the GPIO ports(P0~P16, P19~P20).

Beneath each I/O port, there are pins for VCC and GND. These pins are differentiated by different colors, which enable you to connect your extension module easily. The spread of pins is fully compatible with the Octopus series products.

With a voltage boosting module, you can shift the working voltage of P8, P9, and P11~P16 between 3.3V and 5V through the voltage switch.

Lead out the serial port, I2C port, and SPI port, among which I2C can connect 3 channels of I2C devices and SPI can connect 2 channels of SPI devices.

Available for direct serial port communication between two breakout boards.

APPLICATION It is suitable for all conditions that require micro:bit GPIO such as programming education, smart device creation, and so on.

IoT:bit is an expansion board based on IoT micro bit. Iot boards uses ESP8266 as a WIFI expansion board and serial port to communicate with micro:bit. It also has extended all available IO ports of the micro:bit which is led by GVS and you can extend various 3V E-blocks as LED, photosensitive, and servo by using it. At the same time, the IoT:bit with an on-board buzzer for outside sound and an on-board RTC clock for timing without a power supply. Let's create your own IoT micro bit by makecode!

IoT:Bit: A RELIABLE TOOL TO ESTABLISH CONNECTION ACROSS DEVICES The IoT boards can help anyone fully grasp the digital apparatus of computers. Establishing interconnected networks amongst devices can be crucial in data analysis. IoT-based components are often used to speed up this task for a micro bit. IoT bit is a device that works as an internet extension for a micro bit. It is applied on circuit boards to improve the means of productivity by creating valid communication with the micro bit. IoT bit is a very compact tool that is made with complicated circuitry within itself. Anyone who wishes a reliable internet WIFI extension board for their micro bit should try out this component. Various sorts of tasks done by them can be improved manyfold through this seemingly minuscule module.

DESIGNED WITH A VARIETY OF FEATURES The IoT-based module is equipped with many handy features that can ensure the efficiency of the micro bit. The IoT bit uses an ESP8266 as a board for WIFI expansion for data transactions through the micro bit. Led by GVS, the board also has extended IO ports for the micro bit, which lets you add a variety of other parts. The onboard buzzer can be triggered from the outside, and the RTC clock within can stay functional even without a power supply. The IoT bit also has an earphone jack and an integrated buzzer. The design is very simplistic compared to the functions, as you can construct them any way you please. The four LEGO-like holes make them very adaptable when used in a micro bit.

RELIABLE HARDWARE The IoT:bit is a valuable component that itself is made out of smaller components. The hardware of any electrical entity can be deemed very important. Through the micro bit, the direct current is supplied via a USB at five volts. The expectation for maximum current is around 800mA, which is appropriate to keep the micro bit functional. The hardware stays operational from -25 to 80 degrees Celsius. The WIFI module used for the micro bit is labeled ESP8266. The ESP12F is very reliable as it is widely used in components similar to IoT bit. The passive buzzer is worth mentioning too. The RTC timing mechanics lets the device memorize the pace of time even after cutting off the power supply of the micro bit. RTC battery for the micro bit is something you can add in yourself. The battery requires a CR1220 cell. The coding port is a serial port in the micro bit that can delineate the IO slot.

EASY TO INSTALL & ACCEPTABLE SIZE Adding components to a micro bit can be difficult as it is a miniature computer. The IoT boards are very sizable addition to the micro bit. It has a surface area of fewer than 50 centimeters and is 23 millimeters in depth. The printed circuit board is an essential part of the entire system. The PCB thickness is about 1.5mm. IoT bit has four adaptable slots, which let them get attached to the micro bit. Each of these holes is 2.4mm in diameter.

INTERPHASE VARIABLES There is much to discuss a variety of functions visible on the interphase of IoT bit. The micro bit you use will probably have lots of potential in it, which you could not utilize because of not having the right component. IoT bit has a GVS leaded function had grants access to the electronic building module and also a functional 12C communication device. No need to reset the time every time you start the micro bit because of the RTC timing system.

FEATURES

Integrated ESP12F WiFi、RTC and passive buzzer module

Extended most IO ports by GVS

Silk-screen indication onboard main components

Separately lead IIC interface, directly plug in OLED, BME280 and IIC, etc

Integrated buzzer and earphone jack

Adaptive for LEGO (4 standard spacing fixed holes)

The Experiment Box is a versatile learning kit designed to introduce students to practical electronics and physics through micro:bit-controlled experiments. Inspired by traditional lab setups, this compact kit allows learners to build and control real-world circuits while developing coding and analytical skills.

Note: BBC micro:bit is not included

Key Features:

All-in-One Storage: Components are neatly packed in a portable box to prevent loss and keep everything organised.

Banana Plug Connections: Includes standard banana plug wires and sockets—ideal for connecting to power supplies, testing signals, using multimeters, or prototyping circuits.

User-Friendly Setup: Banana plugs offer a reliable, easy-to-use method for assembling and adjusting circuits, helping learners gain confidence in building electronic systems.

Foundations for Future Learning: The use of professional-style connectors provides a great stepping stone for more advanced circuit design and testing.

This kit is perfect for classroom labs or home-based learners looking to explore physics, circuitry, and microcontroller programming in an engaging, hands-on way.

Micro bit v2 Joystick:bit V2 is a game board based on micro:bit. It contains a 4-direction joystick and 4 undefined buttons. At the same time, it enhances the game experience with its on-board buzzer and vibration motor. micro bit v2 Joystick:bit V2 can also be used as a remote control with a good appearance and comfortable feels.

Features

Language: Javascript / Makecode / Microsoft Touch Develop / Python.

Load with buzzer.

Support vibration feedback.

Compatible with the MakeCode packages.

Power off automatically after unplugging the micro bit v2.

Due back in stock early December

The micro:bit Smart Agriculture Kit includes a carefully curated selection of components such as the IoT:bit expansion board, DS18B20 temperature sensor, soil moisture sensor, water level sensor, PIR motion sensor, servos, and more.

1 x IoT:bit Internet WIFI extension board for micro:bit

1 x Rainbow LED

1 x PIR sensor

1 x DS18B20 sensor

1 x DHT11 sensor

1 x Sonar:bit

1 x Soil moisture sensor

1 x Water level sensor

1 x OLED screen

1 x EF92A 180° servo

1 x micro USB cable

Jumper wires

Smart Ai lens kits is an Artificial Intelligence module compatible with 3.3v~5v micro:bit expansion board which can be programmed graphically. Buy Smart Lens from us. Our ELECFREAKS micro:bit Smart AI lens kits are designed for children. The Smart AI lens kits can be applied in card identification, line-tracking, ball tracking, color identification, one-button to the quire, and face tracking.

Elecfreaks Smart Coding Kit is a wearable device based on micro:bit button cell extension board Pro, a DIY micro:bit watch can be easily made with a simple installing method.

NOTE: Micro:bit not included

Easy Installation: Only need 4 simple steps, you can easily complete the installation. Children can also choose to hang around the neck with a string.
Creativity: It fits for graphical Makecode and Scratch programming. Kids can creat many cases such as dice games,thermometer,compass, pedometer, play music, wireless control and so on...
Two Button Cells: Let the microbit run without usb cable and bulky battery holder. In order to be as small as possible, we only support 2025 button cells.
Wear:bit Extension Board has 2 Switches: Power Switch and Buzzer Switch, Children can better control the micro:bit and buzzer as needed.

SUPPORT MULTIPLE PROGRAMMING The fun cases will bring children the joy of programming! Children can use programming to achieve what they want. It better improves children's interest in programming! Teachers or parents also can give the child some help through communication to let the child have fun in programming!

CHARACTERISTIC FOR Wear:bit

Powered by two 3V CR2025 lithium batteries.

Loaded with a buzzer that is controlled through the P0 port.

Loaded with a buzzer switch.

It can be used with the watch strap and the micro:bit.

The ElecFreaks Cutebot is a rear-wheel drive smart car designed for the micro:bit, featuring two powerful motors for fast and responsive movement. Packed with built-in features, it includes an ultrasonic distance sensor, dual RGB headlights, underglow position lights, two line-following sensors, and a buzzer that functions as a horn.

Cutebot is fully compatible with graphical programming platforms, allowing learners to progress from simple coding tasks to more advanced robotics challenges. With its interactive features and user-friendly design, it’s the perfect tool to introduce children to coding, electronics, and hands-on problem-solving.

Note: micro:bit is not included

The micro:bit Smart Health Kit by ElecFreaks includes a thoughtfully selected range of components such as the Sensor:bit, analog UV sensor, PIR motion sensor, alcohol detection sensor (MQ3), servo motor, and more. These parts allow students to create a variety of health-related projects—including UV exposure monitors, posture reminders, alcohol detection systems, and automated smart bins.

By building these interactive projects, learners gain hands-on experience with programming and electronics, while also exploring how technology can support healthier lifestyles. This kit is an ideal way to introduce scientific thinking and coding through real-world, wellness-focused applications.

What is included?

1 x Sensor:bit

1 x MO3 Alcohol Sensor

1 x Cash Sensor

1 x Rainbow LED

1 x PIR Sensor

1 x DHT11 Sensor

1 x UV Sensor

1 x Soil Moisture Sensor

1 x Motor with Fan

1 x OLED Screen

1 x EF92A 180° Servo

1 x micro USB cable

Jumper wires

Note: BBC micro:bit is NOT included

Smart Home Kit is a product about smart home project base on micro:bit which is developed by Elecfreaks. With selected executed components commonly used at home such as a temperature sensor, sound sensor, crash sensor, servo, motor, you can build scenes like windowsill, wardrobe and fish tank, create yourself smart sweet home and programming to intelligently driving them using micro:bit. Smart home is what makes life more practical and playing with it is what makes life more interesting.

Features

1. Extend most IO ports by GVS terminal.

2. Independently lead out IIC interface. Enable to plug in IIC components like OLED, BME280, etc..

3. Integrated a buzzer and an audio jack.

4. Support building blocks interface.

5. Mark out each IO port with silk printing.

What's included?

1 x Relay

1 x Temperature Sensor

1 x Light Sensor

1 x Rainbow LED

1 x Soil Moisture Sensor

1 x Motor With Fan

1 x Crash Sensor

1 x 3V Sensor:bit (Size:57mm*42mm)

1 x OLED Display

1 x Noise Sensor

1 x Submersible Pump

1 x 180° Servo

1 x micro:bit USB Cable

9 x GVS 3-Pin Dupont Wires

1 x Guidance Manual

1 x Crystal Battery Box

The ElecFreaks Smart Science IoT Kit (micro:bit not included) offers an exciting introduction to the world of the Internet of Things (IoT), enabling students and makers to build real-time data-driven projects. Designed to inspire exploration and creativity, this kit includes a robust set of sensors and modules to support a wide range of scientific and technological experiments.

Based on the IOT:bit breakout board, the kit features components like an ultrasonic sensor, dust sensor, water level sensor, light sensor, built-in WiFi module, and RTC (real-time clock). These tools allow you to monitor environmental conditions and send accurate data to the cloud, making it ideal for projects involving data collection, analysis, and remote monitoring.

Whether you're creating a smart weather station, tracking air quality, or experimenting with automated systems, this kit provides everything needed—except the micro:bit—to dive into IoT and STEM learning. Perfect for classrooms, clubs, or independent study, it’s a valuable resource for both beginners and experienced users looking to explore the science behind smart systems.

Note: BBC micro:bit is not included

The ElecFreaks micro:bit Starter Kit is the perfect introduction to coding and electronics for primary and secondary classrooms. Designed around the BBC micro:bit, this hands-on kit includes a curated selection of sensors, LEDs, modules, and components that help students explore real-world STEM concepts through simple, engaging projects.

Ideal for beginners, the kit comes with easy-to-follow tutorials covering basics such as lighting LEDs, reading sensors, controlling motors, and creating interactive circuits. It’s an excellent choice for teaching coding, physical computing, and design thinking, making it a classroom favourite for CT, STEAM, and after-school clubs.

Please Note: BBC micro:bit board is not included and must be purchased separately.

The ElecFreaks micro:bit Tinker Kit is developed in collaboration with TINKER ACADEMY, a respected educational provider based in Singapore with a strong academic foundation. This comprehensive kit includes a wide range of Octopus sensors and step-by-step tutorials, enabling students and makers to build dozens of exciting digital projects. It’s an ideal resource for exploring electronics, coding, and design through practical, project-based learning.

The ElecFreaks Octopus:bit is an expansion board designed to extend the micro:bit’s capabilities. It breaks out the GPIO, serial, I2C, and SPI ports, making it easier to connect various modules. A standout feature is its ability to shift voltage levels on select GPIO pins, allowing compatibility with 5V sensors—opening up even more possibilities for creative experimentation and real-world applications.

Plant Monitoring Device : Upload your code into the micro:bit and stick that moisture sensor into the base of your plant. You pots will be able to tell you when your plants are thirsty!
Music Machine: Since there are 5 buttons, we need to code 5 similar conditional statements. Each button controls a sound of a particular pitch. So press each buttion, we will get sounds of different pitches.
Electro-Theremin: We want to make sure the highest potentiometer value still corresponds to the highest note we can play. Check out the value of the lowest and highest notes in the micro:bit piano keys. Twist the knob to control alien noises!
Smart Light: Upload your code into your micro:bit. Walk into the dark with your new smart light, or place it in a room to brighten up when you walk in.

Note: micro:bit not included

Motor:bit is a motor driving board based on micro:bit. It has integrated a motor driving chip, which is used to drive two motors with maximun 1.2A DC single channel current. It has also integrated 12 GVS ports (for connecting OCTOPUS series of electric bricks) and 1 IIC communication port. These ports allow you to extend with various sensors and electric modules.

On the board, P3-P7, P9-P10 are IO ports for directly driving 3.3V devices; P13-P16, P19-P20(IIC port) support 3.3V/5V voltage switch. Sliding the voltage switch onboard, it is available to drive 3.3V or 5V devices. Besides, you can play music with the buzzer on motor:bit. Motor:bit is totally designed for DIYers. You can use it to create your own smart car or any funny projects.

FEATURES

Support 2 DC motors.

Max driving current of single channel is 1.2A.

Extend 14-channel IO ports and lead out it by GVS pins. Among it, 6 ports support 3V/5V voltage switch.

With 1 passive buzzer on board.

ELECFREAKS Power:bit is a pocket-sized extension board. Power:bit is powered by two 2025 button batteries and carries a buzzer on the board. Due to its small cute size and abundant electric power, it is quite suitable to be applied to micro:bit wearable devices like pedometers, timers, portable music broadcasters, and so on.

FEATURES

Powered by two CR2025 li-batteries.

The buzzer on board is connected to the P0 port on micro:bit.

P0, P1, P2, 3V, and GND can be led out by pins.

Enable to match micro:bit and acrylic watch band.

The RETRO Arcade for Education is the first arcade device in a big screen with a high resolution. Kids are able to use them to create their games in a fun and easy way through the blocks program, and the Retro allows for a self-defined game role, multiple game sceneries and plots design. It surprises you more with the bountiful built-in sensors and gives kids more chances for creation.

WHAT IS Microsoft MakeCode ARCADE?
MakeCode is a graphical programming platform born for education under the Microsoft Corporation. It provides programming tools and learning tutorials for children at different coding levels. MakeCode has instant results, a blocks editor, a text editor, a steps guide, and other features that allow children of all ages to learn to program. Arcade is a game programming project under the MakeCode graphical programming platform, Microsoft supports it with a technical framework.

Sensor:bit is a breakout board based on micro:bit. It has extended all available IO ports on micro:bit, and lead out them in the form of GVS. With this board, we can extend various 3V electric brick modules like LED light, photocell, etc.. On the board, it has integrated a buzzer and an audio jack, which allows you to hear music from the buzzer or with headphones.

FEATURES

Extend most IO ports on micro:bit by GVS pins.

Independently lead out IIC interface. Enable to plug in IIC components like OLED, BME280, etc..

Integrated a buzzer and an audio jack.

Support interface.

Mark out each IO port with silk printing.

This is a micro servo It only weights 20g and provides a 1.6kg.com torque. It will comes with a 3-pin control cable and mounting hardware.

Almost all the micro bit servo in the market have to be driven by 5V, but the normal working voltage for micro:bit is 3V. It is embarrassing to drive a 5V servo with a micro:bit. Thus, we have customized these two servos that can be driven by two batteries with the lowest working voltage at 2.7V. It is the first batch of the micro bit servo designed for the micro:bit in the market.

The high linearity makes its control more accurate. It is designed for micro:bit with high-linearity, which gives you a smooth feel of control.

Low working voltage, compatible to 3V-5.5V(With 2.7V at least), designed for micro:bit.

ELECFREAKS micro:servo is a kind of 360 deg analog servo. It is light and portable, a little bigger than 5 cent coin. It works at 3V voltage and uses pulse width to adjust speed of the servo rotation, which also can be used to make small robot modules, mechanical arm modules and intelligent car modules.

Octopus MP3 module is a tiny and delicate sound module with on-board loudspeakers, it is able to play music stored in the TF cards via program.

Feature 1: Control the volume, files, and on/off status via the program

Feature 2: Read TF cards directly

Feature 3: Load with earphone ports, it is able to connect with the loudspeaker box.

ELECFREAKS' micro:bit case is made of 1mm thin and light material, has a silky smooth feel, is waterproof and impact resistant, and does not interfere with expansion.

A microbit V2 is a small, pocket-sized computer that allows you to program and create interactive projects. It is an excellent tool for students, educators, and hobbyists who want to learn more about coding and electronics. However, a microbit V2 is also vulnerable to damages and scratches, which can affect its performance and longevity. To prevent this, a micro:bit case is a practical solution that protects your microcontroller while keeping it accessible for your projects.