micro:bit kits

• Upgraded processor (nRF52833)
• 64MHz Arm Cortex-M4 FPU (over 4 times faster!)
• 512KB Flash storage on board
• 128KB RAM
• MEMS Microphone with LED indicator and on-board speaker
• 5x5 LED matrix display
• Touch sensitive logo "button"
• Accelerometer/compass
• Light and temperature sensors
• Sleep/off mode for batteries powered projects (w/ LED indicator)
• Up to 200mA of current for external accessories
• Bluetooth 5.0 radio allowing micro:bits to talk to each other
• Notched edge connector (easier to connect things like crocodile clips and conductive thread)
• Dimensions: 52mm x 42mm x 11.7mm

It's the same shape and size so should be already familiar to countless teachers and learners, and also compatible with the vast majority of add-on boards and accessories.

With over four times the processing power and eight times as much RAM as the original micro:bit this new model opens up a world of new possibilities! We're especially excited about how well MicroPython will run on the new model where previously the limited RAM was a struggle.

• Upgraded processor (nRF52833)
• 64MHz Arm Cortex-M4 FPU (over 4 times faster!)
• 512KB Flash storage on board
• 128KB RAM
• MEMS Microphone with LED indicator and on-board speaker
• 5x5 LED matrix display
• Touch sensitive logo "button"
• Accelerometer/compass
• Light and temperature sensors
• Sleep/off mode for batteries powered projects (w/ LED indicator)
• Up to 200mA of current for external accessories
• Bluetooth 5.0 radio allowing micro:bits to talk to each other
• Notched edge connector (easier to connect things like crocodile clips and conductive thread)
• Dimensions: 52mm x 42mm x 11.7mm

It's the same shape and size so should be already familiar to countless teachers and learners, and also compatible with the vast majority of add-on boards and accessories.

It's programmed with beginner friendly, drag and drop interface MakeCode with the option to progress into MicroPython later on, opening up even more programming possibilities!

It's packed with inputs, outputs, sensors and radio communication features that can be combined into and endless variety of projects.

Inputs and outputs: An important part of any computer system. As a very small computer, the BBC micro:bit has plenty of inputs and outputs to learn about and use.

LEDs: An LED, or light-emitting diode is an output device that gives off light. Your BBC micro:bit has a display of 25 LEDs for you to program.

Buttons: A very common input device. Your micro:bit has two "clicky" buttons and a touch sensitive button you can program, and a reset button.

Radio: A way of sending and receiving messages and BBC micro:bits can use radio waves to communicate with each other.

Accelerometer: A motion sensor that measures movement. The accelerometer in your BBC micro:bit detects when you tilt it left to right, backwards and forwards and up and down.

Compass: An input sensor that detects magnetic fields. Your BBC micro:bit has an inbuilt compass that can detect the direction in which it is facing.

Light sensor: An input device that measures light levels. Your BBC micro:bit uses the LEDs to sense the levels of light and lets you program your micro:bit as a light sensor.

Temperature sensor: An input device that measures temperature. Your BBC micro:bit has a temperature sensor inside the processor which can give you an approximation of the air temperature.

Pins: On the bottom edge of your BBC micro:bit there are 25 gold strips, called pins. These pins allow you to really get creative. You can create circuits, connect external things like buzzers and motors and make your own fun projects.

Sound: Your BBC micro:bit can be programmed to make a wide variety of sounds - from single notes, tones and beats to your own musical compositions.

• Computer/laptop with Internet access

Resources

• Set up guide
• Using the LEDs and buttons
• Using the sensors
• Radio and Pins
• Project ideas

The micro:bit V2.2 has no less than six sensors onboard to create awesome projects:

• Motion
• Temperature
• Light
• Magnetism
• Sound
• Touch

More Resources

The BBC micro:bit is a pocket-sized computer that introduces you to how software and hardware work together. It has an LED light display, buttons, sensors, a speaker, microphone and many other input/output features that, when programmed, let it interact with you and your world.

Visit What is the micro:bit? to find out more or explore all the features in depth through short videos.

You will need a computer, tablet or phone to write and send code to the micro:bit, but once the code is on the micro:bit it works as a standalone device with just the battery pack. Visit getting started for support taking your first steps with the micro:bit.

The Micro:bit Educational Foundation produces free coding tools and teaching resources to support you as you explore the potential of the micro:bit:

• Choose your perfect programming tool in Let's Code:
  • Run whole class coding sessions easily with micro:bit classroom
  • Teach block-based coding with Microsoft MakeCode or text-based coding with the micro:bit Python Editor
• Explore our free resources for teachers including:
  • Quick projects for beginners and more advanced users
  • Curriculum-linked lessons and units of work
  • Professional development courses and events like webinars and code-alongs
  • Classroom resources such as student handouts, reward certificates and posters

As well as givings students a hands-on approach to coding, the micro:bit is an engaging classroom tool that gives students confidence to try new things and get creative with technology.

You will find loads of info, lessons, projects and other resources at https://microbit.org/get-started/first-steps/introduction/

Are you a teacher that need assistance or material to improve your classes? Have a look at the free resources for teachers



The BBC micro:bit is a pocket-sized codeable computer with motion detection, a built-in compass, LED display, and Bluetooth technology built in.

It measures 4cm by 5cm, is available in a range of colours, and designed to be fun and easy to use. It can be coded with something simple in seconds – like lighting up its LEDs or displaying a pattern – with no prior knowledge of computing.

It also connects to other devices, sensors, kits and objects, and is a companion to Arduino, Galileo, Kano, littleBits and Raspberry Pi, acting as a spring board to more complex learning.

Each element is completely programmable via easy-to-use software on a dedicated website that can be accessed from a PC, tablet or mobile.

You will find loads of info, lessons, projects and other resources at https://microbit.org/get-started/first-steps/introduction/

Are you a teacher that need assistance or material to improve your classes? Have a look at the free resources for teachers



The BBC micro:bit is a pocket-sized codeable computer with motion detection, a built-in compass, LED display, and Bluetooth technology built in.

It measures 4cm by 5cm, is available in a range of colours, and designed to be fun and easy to use. It can be coded with something simple in seconds – like lighting up its LEDs or displaying a pattern – with no prior knowledge of computing.

It also connects to other devices, sensors, kits and objects, and is a companion to Arduino, Galileo, Kano, littleBits and Raspberry Pi, acting as a spring board to more complex learning.

Each element is completely programmable via easy-to-use software on a dedicated website that can be accessed from a PC, tablet or mobile.

• Microprocessor: 32-bit ARM® Cortex™ M0 CPU
• A 5x5 LED matrix with 25 red LEDs to light up and can display animiated patterns, scrolling text and alphanumeric characters
• Two programmable buttons. Use them as a games controller, or control music on a smart phone
• On-board motion detector or 3-AXIS digital accelerometer that can detect movement e.g. shake, tilt or free-fall
• A built-in compass, 3D magnetometer to sense which direction you're facing and your movement in degrees and detect the presence of certain metals and magnets
• Bluetooth® Smart Technology. Connect the micro:bit to other micro:bits, devices, phones, tablets, cameras and other everday objects
• 20 pin edge connector: This allows the micro:bit to be connected to other devices such as Raspberry Pi, Arduino, Galileo and Kano through a standard connector
• Micro-USB controller: This is controlled by a separate processor and presents the micro:bit to a computer as a memory stick
• Five Ring Input and Output (I/O) including power (PWR), ground (GRD) and 3 x I/O.
• System LED x 1 (yellow)

• System push button switch x 1

Description:

The MonkMakes Solar Experimenters Kit for micro:bit is a project kit that allows you to experiment with harvesting energy from the sun and other light sources. It consists of a solar panel to harvest the energy, a solar store that stores the harvested energy, and a low energy light bulb and a motor that can be driven with the energy that you harvest.

Specifications:

There are three projects that introduce energy harvesting without the micro:bit, followed by 3 bigger projects that use the micro:bit (not provided) as an intelligent controller. The micro:bit monitors and manages the charging and discharging of the solar store.

With this project kit you will learn all about how tiny amounts of energy can be harvested from the sun and stored for later use, using a practical and experiment-led approach.

What's in the Box ?

1 x 10v Solar Panel 
1 x Solar Store Board 
1 x 3v LED light bulb
1 x Set of alligator clip leads (10 leads)
1 x Small motor with fan
1 x Booklet (A5)

Resources:

- Instructions (PDF)

- Data Sheet (PDF)

Lessons Plans are available here: https://drive.google.com/drive/folders/1o5tRY1PeU4N-NSVctra4NxnCvmP65Huj

The Kitronik :MOVE Motor for the BBC micro:bit provides a fun introduction to buggy robotics. More than just a programmable buggy, learning to use all of the included features will give the budding roboteer a solid grounding in robotics as a whole.

Learn about movement, how to utilise light and sound, obstacle detection and avoidance, and how to code :MOVE Motor to follow a line. When used in conjunction with the micro:bit's radio features, the possibilities are endless.

Attached to the chassis are two bi-directional DC motors with variable speed control. The wheels have rubber tyres and are a simple push-fit onto the motor shafts. Slot a BBC micro:bit into the edge connector and you are ready to code. There is no other assembly required and no tools required.

There are built-in battery holders for 4x AA batteries. This provides a regulated voltage supply to power the BBC micro:bit which is fed into the edge connector. There is also a power switch to conserve batteries when the buggy is not in use.

The micro:bit slots into the onboard edge connector. Code the micro:bit, plug it into the buggy, switch the power on, and then play.

:MOVE Motor can be coded using the Microsoft MakeCode editor. Kitronik has produced a set of custom MakeCode blocks to simplify coding the completed buggy. The booklet that comes with the buggy contains more detailed instructions on using the blocks and writing code. If you are feeling more adventurous or relish a challenge, :MOVE Motor can also be coded with Python.

Also within the booklet (that comes inside the box), are some quick tutorials to get you started. There are also additional online tutorials and step by step guides for extra projects.

• This kit does not include a micro:bit, a micro:bit can be obtained from here.
• No soldering is required!
• Minimal assembly required.

• The Kitronik :MOVE Motor for the BBC micro:bit provides a fun introduction to buggy robotics and coding.
• It is backed up by a range of fun tutorials to introduce you to all of the great features.
• All of the tutorials and resources are free.
• There is no soldering required and assembly is quick and super simple.
• The buggy features two bi-direction DC motors.
• There are ultrasonic distance and line following sensors onboard.
• It also features a Piezo sounder and pen mount.
• There are 4 full-colour programable ZIP LEDs.
• Two pin outputs that are ideal for servo connections (can be used for other inputs and outputs).
• The battery holder is built onto the chassis.
• The buggy is also fitted with a power switch to conserve the batteries.
• There is also an onboard edge connector for the micro:bit, code, plug and play.
• Kitronik has produced custom MakeCode blocks to simplify coding with the MakeCode editor.

• • Tech Talks Live Replay.
  • 6 Online MakeCode Tutorials.
  • Drawing Robot Tutorial.
  • Lights & Sound Tutorial.
  • Line Following Tutorial.
  • Motor Adjustment Tutorial.
  • Sensor Tutorial.

The Kitronik LAB:bit for the BBC micro:bit offers a super fun way for children to learn about coding in an engaging and hands-on way. It has been specifically designed for the classroom for KS2 computing and is backed by online MakeCode tutorials, simplified custom blocks, and a detailed getting started guide. Supplied in the box are; a battery holder (3 x AA),  a wheel and tyre for the motor, and the detailed easy to follow guide. 

The board is absolutely packed with an impressive array of features and devices for easy delivery of fun and informative lessons. These include; a motor, ultrasonic distance sensor, 2 x large user-assignable tactile buttons (with indicator LEDs), a microphone, speaker (with volume control), 7 programmable ZIP LEDs(in an arc), A user-assignable potentiometer control, 2 x sets of traffic light LEDs, and LEDs arranged in a dice formation (that can also be used for displaying digits).

The board also features; an edge connector for the micro:bit to slot into, a pre-fitted protective acrylic cover, clip-able pads for attaching an additional motor, 2 x clip-able pads for attaching further buttons/switches, Colour changing power indication LEDS, a cutaway for easy reset button access, and pre-fitted anti-slip rubber feet.

This all in one laboratory environment ships with a detailed getting started guide, filled with step by step information that can easily be followed by either teacher or pupil. The guide starts with an introduction to using a micro:bit and the MakeCode editor, with each explained in detail. This is then followed by instructions for fitting the wheel to the motor. Each area of the board is explained in detail, complete with code examples for each. As with the previous sections, this part of the booklet has been designed so that it can be used by teachers and pupils.

Coding is done via the MakeCode blocks editor. Kitronik has produced custom blocks for the editor to ensure that they are suitable for use with pupils aged 7-10. Each area of the board has its own blocks that all slot together in intuitive ways and they have been organised into subdirectories by type. For example, all of the blocks for the motor are in one submenu and blocks for the traffic lights are in another submenu. There is also an 'other' submenu that contains blocks for the more advanced/older students who require an extra level of challenge. Detailed information on how to add these blocks to MakeCode can be found in the Getting start guide that ships with LAB:bit.

Power is provided via the provided 3 x AA battery holder into the DC barrel jack input. The board has been rated for a maximum of 6V and a minimum of 3V, 3V - 4.5V recommended. The onboard power regulation circuit provides power to the board and to the micro:bit, removing the need to power the micro:bit separately. LAB:bit has an inbuilt polarity protection circuit for the DC input. There is a Colour changing power LED to indicate when the battery voltage is getting low.

• No soldering.
• Minimal mechanical assembly required. The wheel needs to have the tyre fitted and then to be fitted to the onboard motor.
• This kit is not supplied with a micro:bit. The micro:bit is available separately here.

• LAB:bit is an all in one educational platform designed for the delivery of KS2 computing in the classroom (7 - 10-year-olds).
• It's packed full of devices, LEDs, switches, sensors, and other programmable features.
• It features an edge connector for the micro:bit to slot into, no tools required.
• LAB:bit is supplied with a pre-fitted protective acrylic cover.
• Additionally, there are clip-able pads for attaching an additional motor, 2 x clip-able pads for attaching further buttons/switches, colour changing power indication LEDs, and a cutaway for easy reset button access.
• There are also pre-fitted anti-slip rubber feet to ensure that LAB:bit stays securely on the desk.
• Code it with blocks in the MakeCode editor.
• Kitronik custom blocks to make coding more intuitive and straightforward.
• Custom blocks are grouped by type to make it easy to go straight to the blocks you need.
• No soldering!
• Minimal mechanical assembly required.
• Supplied in the box are; a battery holder (3 x AA) and a wheel and tyre for the motor.
• Power LAB:bit via the provided 3 x AA battery holder.
• The board is rated for 3V - 6V.
• It has an inbuilt polarity protection circuit for the DC input.
• The onboard power regulation circuit provides power to the board and to the micro:bit, removing the need to power the micro:bit separately.
• LAB:bit is supplied with a fully comprehensive getting started guide. It takes you through everything you need to know and can be followed by both teacher and pupils.

•     Lighthouse
•     Movement Alarm
•     Color Mixer
•     Anemometer
•     Fan Speed Controller
•     Clap Controller Fan
•     Nightlight

This 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.

Features

• A DIY (Do It Yourself) Watch kit
• Designed for micro:bit
• Works with both the micro:bit V1 and micro:bit V2
• Comes with sample code (in the guide)
• Power with Coin Cell battery (CR2025 or CR2016)
• Comes with Strap
• Easy to assembly

You will need 2 x CR2025 batteries
and a micro:bit to complete the watch.

Resources

• Detailed Guide for assembly and coding available at https://www.elecfreaks.com/learn-en/microbitKit/smart_coding_kit/index.html

Features:

• Compatible with both micro:bit V1.X and V2.
• The building:bit kit is designed based on BBC micro:bit, equipped with Super:bit professional expansion board.
  • The most popular microcontrollers for children are suitable for STEAM education.
  • Super:bit expansion board specially designed for micro:bit can perfectly integrate with building blocks, build any shape, and drive building block servo, motor, RGB lights and other devices.
• 16 kinds of building block models full-color printing project instruction manual
  • The building block parts of this kit are dominated by blue and white, the whole is full of science and technology, which can be assembled into N models.
  • The manual includes assembly steps of 16 kinds of models and basic instruction content for programming.
• MakeCode programming Python programming, suitable for users of different ages.
  • MakeCode programming: It can effectively reduce the learning threshold and improve children's interest in learning by dragging and splicing colorful building blocks
  • Python programming: A string of character commands control the building blocks, writing a wonderful chapter belonging to the Makers and building block enthusiasts.
• Support App/game handle remote control
  • When using different equipment to interact with the building blocks, the user can experience the fun brought by technology.
• Compatible with Lego building block, various gameplays
  • 16 kinds of models with up to 80 gameplays, such as spider walking, helicopter propeller rotation, car wriggling, cannonball shooting, etc.
  • Users can also expand through more Lego bricks and build more interesting shapes.
• Programming language: MakeCode graphical programming / Python programming

Specifications:

• Remote control method: APP/micro:bit gamepad
• Main material: ABS
• Package Weight: about 1400g
• Packing box size: 288 * 213 * 68mm
• Battery type: Rechargeable lithium battery
• Lifetime: 120 minutes
• Battery energy: 3.7V / 1200mAh
• Working temperature: 4 ~ 40 ℃
• Onboard function: RGB lights, buzzer, etc.
• Number of building blocks: 358 high-precision building blocks
• Motor / Servo: 2 motors, 1 servo

Resources:

• Yahboom Building:bit superkit tutorial
• Superbit hardware interface manual, pdf file
• APP(Android) download
• Bluetooth communication protocol, pdf file
• Assembly Instructions, zipped file, extract to get jpeg files
• Makecode offline software

The Kitronik Inventor's Kit for the BBC micro:bit is a great way to get started with programming and hardware interaction with the BBC micro:bit. This Inventor's Kit contains everything you need to complete 10 experiments including using LEDs, motors, LDRs and capacitors.

To get you off to a flying start, we have included an easy to follow tutorial book which guides you through everything you will need to know about programming the BBC micro:bit. You don't need any experience with programming as the tutorial book will guide you every step of the way. You'll be programming and creating circuits in no time!

The Kitronik Inventor's Kit for the BBC micro:bit provides a fantastic way of learning how to construct and control electronic circuits. The BBC micro:bit has a selection of pins that are located on the bottom edge of its PCB. By using our specially designed Edge Connector Board for the BBC micro:bit in conjunction with the breadboard (see below), it is easy to use these pins to connect additional components to the BBC micro:bit.

Note:

• This kit requires assembly.
• No soldering is required and you can build your first circuit in minutes!
• This kit does not include a BBC micro:bit.
• If you purchase a micro:bit separately you may also need to purchase a Battery Enclosure and a USB Cable, depending on which micro:bit option you purchase.

Features:

• No soldering required - build your first circuit in minutes!
• Make 10 experiments included in the provided step-by-step tutorial book.
• All parts are included to conduct the 10 experiments (listed below).
• Breaks out 21 accessible pins from the BBC micro:bit using the Edge Connector Board for the BBC micro:bit (included).
• Small Prototype Breadboard included for fast prototyping.
• This kit is available as a single pack or as a 20 pack.

What's in the box?

The contents below are for a single Inventor's kit pack.

• 1 x Mounting Plate.
• 1 x Potentiometer - Vertical Type (finger adjust) 100K.
• 1 x Finger Adjust Spindle.
• 2 x Plastic Spacer 10mm.
• 1 x Sticky Fixer for Battery Pack.
• 1 x Small Prototype Breadboard.
• 1 x Terminal Connector.
• 4 x Push Switch.
• 1 x Motor.
• 1 x Transistor.
• 2 x Red 5mm LED.
• 2 x Orange 5mm LED.
• 2 x Yellow 5mm LED.
• 2 x Green 5mm LED.
• 1 x RGB 5mm LED.
• 1 x Fan Blade.
• 5 x 2.2KΩ Resistor.
• 5 x 10KΩ Resistor.
• 5 x 47Ω Resistor.
• 1 x Edge Connector Breakout Board for BBC micro:bit.
• 10 x Male to Male Jumper Wires.
• 10 x Male to Female Jumper Wires.
• 1 x 470uF Electrolytic Capacitor.
• 1 x Piezo Element Buzzer.
• 4 x Pan Head M3 Machine Screw.
• Depending on which booklet version your Inventors Kit shipped with, you will have one of the two following components;
• 1 x Miniature LDR. For booklet versions pre V1.7.
• 1 x Phototransistor. For booklet versions post V1.7.

Requires:

• 1 x BBC micro:bit.
• 1 x Phillips Screwdriver.
• 1 x Terminal Block Screwdriver.
• 1 x Micro USB Cable.

All of the experiments included in this booklet (listed below) are based on the Microsoft MakeCode Editor. We have also produced a MicroPython code example for each of the experiments and Video resources featuring a walk-through and hints and tips to help you complete the experiments.

Inventors Kit Additional Free Resources:

Third-Party Resources:

Insight Resources Mr Bit is an online educational coding platform that also features sections devoted to some of our key micro:bit accessories, including this kit. This content has been developed by Insight Resources and any questions relating to them should be directed at their contact information. To access these resources, please visit;

• Insight Mr Bit.

This project kit comes with the new Maker Soil Moisture Sensor.

A capacitive moisture sensor which measures the soil moisture level by changing the probe capacitance and does not erode the sensor probe easily.

The Lesson Guide is written in simple language and comes with a step-by-step guide to make an auto plant watering system.

Click here to download PDF English Version

Lesson 1 : Hello!

• Introduction to micro:bit and MakeCode.

Lesson 2 : What’s the Soil Moisture Level?

• Display soil moisture level through micro:bit by using Maker Soil Moisture Sensor.

Lesson 3 : Dry? Moist? Or Wet?

• Monitor the soil moisture level and differentiate it between dry, moist and wet.

Lesson 4 : Water the Plant

• Turn on the water pump to water the plant when the soil is dry.

Lesson 5 : Servo Motor, Direct the Pipe!

• Control the direction of the water pipe by using a servo motor to water the plant thoroughly.

Additional Activities: Visualize Soil Moisture Level, Music On

• Plot a bar graph to show the soil moisture level and make the auto plant watering system to play melodies and sound notifications.

Start having fun with EDU:BIT right out of the box. Start coding right away and see your board lights up and plays melody with the press of a button. No wiring required when used as a training kit. 

Cannot control servo motor and play music at the same time on your micro:bit? Servo motor refuses to move correctly? Worry no more! EDU:BIT takes care of these issues with its dedicated controller and power supply. It can even support up to 3 servo motors and 2 DC motors to actuate any creative projects you will build.

Each feature and its associated micro:bit IO pin is clearly labeled on the board for easy reference. In addition, indicator LEDs are built in on EDU:BIT to ease troubleshooting for both digital and analog IO pins. 

Ready to build your own projects? You can break off the modules on EDU:BIT board for more flexibility in your project design. Plug-and-play cables are provided for you to connect the broken off Bits to the main board. 

Features







EDU:BIT Specifications

• 1x Piezo buzzer with audio jack
• 1x Sound sensor
• 1x Potentiometer
• 1x IR sensor
• 4x Programmable RGB LEDs 
• 3x Big LEDs (traffic light module - red, yellow green)
• 2x Push buttons 
• 3x ports for servo motors
• 2x ports for DC motors
• 1x port for I2C Interface (3.3V)
• Dimension:  157.50 mm x 124.50 mm x 19.00 mm

What's in the box?


1 x EDU:BIT board 
1 x BBC micro:bit board  This kit DOES NOT include micro:bit board.
1 x Step-by-step Guide Book
1 x USB power and data cable
2 x Game maps 
2 x Game accessories
7 x Grove cables
1 x Servo motor
1 x DC motor
1 x Pulley wheel
1 x Fan blade

The BBC micro:bit is a pocket-sized codeable computer with motion detection, a built-in compass, LED display, and Bluetooth technology built in.

It measures 4cm by 5cm, is available in a range of colours, and designed to be fun and easy to use. It can be coded with something simple in seconds – like lighting up its LEDs or displaying a pattern – with no prior knowledge of computing.

It also connects to other devices, sensors, kits and objects, and is a companion to Arduino, Galileo, Kano, littleBits and Raspberry Pi, acting as a spring board to more complex learning.

Each element is completely programmable via easy-to-use software on a dedicated website that can be accessed from a PC, tablet or mobile.

• 2 programming languages
  • Blocks: An easy to use graphical programming language, which is suitable for beginners.
  • Python: One of the most popular and easy-to-learn programming languages.
• 316-page detailed tutorial - Provides step-by-step guide and basic components knowledge. (Download needed, no paper tutorial.)
• 225 common items - All parts needed to complete the projects in the tutorial. No soldering required.
• 44 interesting projects - Each project has circuit diagrams and verified code with detailed explanations.

What's in the box?




Resources