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  • T200 Metal Robot Tank Chassis with Motors & Speed Encoders (T200)
    T200 Robot Tank Chassis

    This medium-sized tank chassis is ideal for building robots with your own controller: Arduino, Raspberry Pi, etc

    It is supplied as a kit, but is very easy to build. Even the hex allen keys are supplied, though you will require a small philips screwdriver

    Powerful motors are supplied which allow the tank to move over difficult terrain using the 45mm wide caterpillar tracks.

    All metal construction provides a very tough and strong product - just the chassis and motors weighs nearly 2.5kg!

    Visit our Blog for construction details

    Specification:
    • Length:  220mm
    • Width:  270mm
    • Height:  55mm
    • Weight:  1kg
    • Carrying Capacity:  4kg
    • Working voltage:  7 - 12V

    Motor Specification:
    • Motor speed:  11500 rpm (nominal at 9V)
    • Gear Ratio: 1:75
    • Output speed 150 rpm (nominal at 9V)
    • No load current: 200mA
    • Stall current:  4500mA (max)
    • Rated Torque: 3kg.cm
    • Rated current: 1200mA (Max)
    • Nominal working voltage:  9V
    • Encoder:  2 pulses per motor revolution

    Speed Encoders:
    Each motor contains a Hall effect sensor on the motor shaft. This provides 2 pulses per revolution of the motor (300 pulses per revolution of output shaft) and can be used by your software to determine the distance moved by each side of the chassis.
    You must power the Hall effect sensors separately with 5V to the V and G inputs, the output is taken from the S1 and S2 signals

    The wires from the motor are coloured as follows
    • Black - Motor Ground
    • Red - Motor Power (7 - 12V)
    • White - Sensor Power (5V)
    • Yellow - Sensor Ground
    • Orange - Sensor 1
    • Green - Sensor 2





    The Hall sensors in the motors:

    • VM, GM:For motor's VCC and GND

    • V, G :sensor power supply

    • S1, S2:Sensor signal output

     

    Add to Cart
    £77.50
  • PlayGround for Crumble - Super Kit (PLAYCRM-SUP)
    Playground for Crumble - Super Kit

    This is an exciting new way to use your Crumble, without requiring crocodile clips which can be difficult for small people to use.

    Also, this new approach allows the use of a single cable for most addons, instead of 3 crocodile clips

    This Playground Super Kit includes:
    • Playground for Crumble (Crumble is not included)
    • 4 x Connection Cables 20cm
    • 1 x Connection Cable 50cm
    • 1 x Connection Cable 100cm
    • Analog Dial Gizmo
    • Light Sensor Gizmo
    • Buzzer Gizmo
    • Traffic Light Gizmo
    • Servo Gizmo
    • Touch Sensor Gizmo
    • 2 x Flame Gizmos
    • 1 x Blaze Gizmo or Fire Stick Gizmo (select as Option)
    See our blog for detailed usage and programming information


    Other Gizmos - Available now
    Many Gizmos are already available and more are on the way. Each Gizmo connects directly to the Playground with usually one connection cable (Traffic Lights uses 3 cables, one for each colour). As with our Crumbs, the Gizmos are colour coded:
    • Blue - Digital Input (eg. Button)
    • Yellow - Analog Input (eg. Dial)
    • Black - Digital Output (eg. Buzzer)
    • Red - Analog Output (eg. motors)
    • White - Smart pixels ("Sparkles")

    Here is a great video introducing Playground for Crumble. A similar approach can be taken with Playground for Pi

    Add to Cart
    £50.40
  • PlayGround for Microbit - Super Kit (PLAYMBIT-SUP)
    Playground for BBC Micro:Bit - Super Kit

    This is an exciting new way to use your micro:bit, with addon components, but without requiring crocodile clips which can be difficult for small people to use.

    Also, this new approach allows the use of a single cable for most addons, instead of 3 crocodile clips

    See our blog for detailed usage and programming informnation

    This Playground Super Kit includes:
    • Playground for Micro:Bit (Micro:Bit is not included)
    • 4 x Connection Cables 20cm
    • 1 x Connection Cable 50cm
    • 1 x Connection Cable 100cm
    • Analog Dial Gizmo
    • Light Sensor Gizmo
    • Buzzer Gizmo
    • Traffic Light Gizmo
    • Servo Gizmo
    • Touch Sensor Gizmo
    • 2 x Flame Gizmos
    • 1 x Blaze Gizmo or Fire Stick Gizmo (select as Option)
    See our blog for detailed usage and programming information


    Other Gizmos - Available now
    Many Gizmos are already available and more are on the way. Each Gizmo connects directly to the Playground with usually one connection cable (Traffic Lights uses 3 cables, one for each colour). As with our Crumbs, the Gizmos are colour coded:
    • Blue - Digital Input (eg. Button)
    • Yellow - Analog Input (eg. Dial)
    • Black - Digital Output (eg. Buzzer)
    • Red - Analog Output (eg. motors)
    • White - Smart pixels ("Sparkles")

    Here is a great video introducing Playground for Crumble. A similar approach can be taken with Playground for Pi

    Add to Cart
    £50.40
  • PlayGround for Raspberry Pi - Super Kit (PLAYPI-SUP)
    Playground for Raspberry Pi - Super Kit

    This is an exciting new way to use your Raspberry Pi with physical components, both digital and analog.
    The Playground for Pi addon board gives you 8 terminals that can be inputs or outputs. Using the growing collection of Gizmos you can create all sorts of inventions
    The Playground for Pi has a built in analog converter which you can easily use with ScratchGPIO or GPIO-zero and there are examples for each of the Gizmos.

    All Gizmos except the standard Motor Gizmo will work with the Playground for Pi.

    This Playground Super Kit includes:
    • Playground for Raspberry Pi (Raspberry Pi is not included)
    • 4 x Connection Cables 20cm
    • 1 x Connection Cable 50cm
    • 1 x Connection Cable 100cm
    • Analog Dial Gizmo
    • Light Sensor Gizmo
    • Buzzer Gizmo
    • Traffic Light Gizmo
    • Servo Gizmo
    • Touch Sensor Gizmo
    • 2 x Flame Gizmos
    • 1 x Blaze Gizmo or Fire Stick Gizmo (select as Option)
    See our blog for detailed usage and programming information


    Other Gizmos - Available now
    Many Gizmos are already available and more are on the way. Each Gizmo connects directly to the Playground with usually one connection cable (Traffic Lights uses 3 cables, one for each colour). As with our Crumbs, the Gizmos are colour coded:
    • Blue - Digital Input (eg. Button)
    • Yellow - Analog Input (eg. Dial)
    • Black - Digital Output (eg. Buzzer)
    • Red - Analog Output (eg. motors)
    • White - Smart pixels ("Sparkles")


    Add to Cart
    £52.40
  • Pi-Stop Educational PiStop Traffic Light Add-on for Raspberry Pi (RPI-STOP)

    Introducing the Pi-Stop

    The Pi-Stop is a low cost hardware module designed to allow Raspberry Pi users to take their first steps into interfacing with the real world.

    Designed with the learning in mind, everyone will recognise and identify its familiar elements encouraging their use along-side their own projects.

    See this independent review
     

    Move past the Stop light

    The Pi-Stop is designed to remove many of the common hurdles people are faced with when getting started using hardware with the Raspberry Pi. Often it is difficult to know what components to use and how to connect them, the Pi-Stop makes it simple by plugging directly onto pre-set positions on the Raspberry GPIO connector.

    By plugging the Pi-Stop directly on to the Raspberry Pi GPIO header, no extra cables or wires are needed. Unlike many other add-on boards, they do not block unused GPIO pins, keeping them open for other uses. The Pi-Stop can be fitted in 4 standard locations, allowing up to four Pi-Stops to be controlled independently or combined with other hardware.

    When used with optional stands, they can be used away from the GPIO header and even daisy chained to make up full traffic light sets.

    For more information about the many ways the Pi-Stop is fitted see the Pi-Stop documentation below.

    Prepare to go!

    The Pi-Stop provides a simple stepping stone, between pure screen based programming and using physical hardware to interact with the real world. Components like the Pi-Stop will provide a flexible and non-restrictive way to build understanding through experimenting.

    Since it is only a step away from a bag of components, it also allows the programming of hardware to be introduced, and the electronics involved can be introduced separately, if desired. Allowing the pupils to discover they can control real things, and then again to discover they can also build their own circuits and control them in exactly the same way.

    Often, people are faced with a magic board which they plug in and tell it to do stuff, however it isn't always clear to them why or how it does it. By providing something which they can remove and replace with something (apparently) completely different (- wires, breadboards and LEDs) they will be able to understand the link.

    By keeping the hardware very simple, it allows better understanding of what is happening, and allows space to come up with your own projects and apply the concepts with your own ideas in mind.

    GO Full throttle

    The documentation and guides are openly available for the Pi-Stop for educational use. There will be guides, tutorials and workshop material available all of which can be taken as is [available as PDF format] or adapted to your own needs [available in markdown format].

    It is encouraged that similar materials can be submitted back for others also to share and make use of.

    The materials will demonstrate the concepts, methods and provide the building blocks to explore ideas and take learning further by with creative projects, activities and games.

    Pi-Stop Documentation

    The following material is available (in both PDF and markdown format):

    Discover: The Pi-Stop: Learn what the Pi-Stop is and how to use it.

    Setup: Scratch GPIO: Get up and running with Scratch GPIO ready to use with the Pi-Stop.

    Explore and Challenge Scratch GPIO: Pi-Stop First Steps: If you've not used Scratch before, this will provide a quick introduction to building your first Scratch GPIO program.

    Explore and Challenge Scratch GPIO: Pi-Stop Traffic Sequence

    Explore and Challenge Scratch GPIO: Pi-Stop Traffic Sequence - Create your own traffic light sequence and learn how to use Scratch GPIO with the Pi-Stop.

    Explore and Challenge Scratch GPIO: Pi-Stop Reaction Game - How fast are your reflexes? Test your reaction time with the Pi-Stop Reaction game.

    Explore and Challenge Scratch GPIO: Pi-Stop Simon Memory Game - Challenge your memory and get the highest score!

    Workshop Materials

    The workshop materials will be split into four areas:

    Discover: This will provide useful reference information for the user which will be useful later on.

    Setup: This contains important information on how to setup your system correctly before you start.

    Explore and Challenge: Step by step guide to gradually introduce the concepts and ideas while applying existing skills and knowledge. These provide an introduction with clear walk-through to a solution, making it an excellent place to get started.

    Create and Solve: We encouraging problem solving by presenting a problem, and providing the components to a possible solution.

    Supporting worksheets:

    Worksheets: The workshop is structured using the worksheets which will tie together the materials, provide space for note taking and a means to keep track of progress.

    Example Workshop

    The following materials were used at the Digimakers Bristol event held the @Bristol Science Centre (14th June 2014) - ready to print PDF format.

    Suitable for age 6 and upwards (probably less with extra guidance), runs for 1 to 2 hours depending on ability/creativity.

    1. Setup: Scratch GPIO (workshop version) - Explains how to setup Scratch GPIO

    2. Explore and Challenge Scratch GPIO: Pi-Stop First Steps - Introduces how to use Scratch and using Scratch GPIO. If you are already familiar with Scratch you can skip this.

    3. Explore and Challenge Scratch GPIO: Pi-Stop Traffic Sequence - Create your own traffic light sequence and learn how to use Scratch GPIO with the Pi-Stop.

    4. Explore and Challenge Scratch GPIO: Pi-Stop Reaction Game - How fast are your reflexes? Test your reaction time with the Pi-Stop Reaction game.

    5. Explore and Challenge Scratch GPIO: Pi-Stop Simon Memory Game - Challenge your memory and get the highest score!

    Workshop Worksheet - Used for participants to keep track of their progress during the workshop.


    On your marks...

    Get set...

    GO!

    Add to Cart
    £2.95
  • PiStop Base for Pi-Stop Educational Traffic Light Add-on for Raspberry Pi (RPI-STAND)

    These bases are ideal for fitting your Pi-Stop traffic lights away from the Pi.

    Each base has a male end and a female end, so that they can be "daisy-chained" together and have multiple lights all going together.

    The bases have 8 holes that fit on Lego® pieces

    Add to Cart
    £1.50
  • GPIO Breakout Intercept for 40-pin Raspberry Pi PCB (10 pack) (BBBBRKT10)
    40-Pin GPIO Breakout for Raspberry Pi - 10 Pack PCB+GPIO Header Only

    This item is a panel of 10 PCBs with the GPIO connector already soldered on. The additional female and male headers shipped with the single item are not included.

    A great way of accessing those unused GPIO pins even when they're covered by a HAT
    • Suitable for all Raspberry Pi with 40 pin GPIO. Zero, A+, B+, 2B, 3B
    • GPIO header is pre-soldered
    • All pins labelled (Broadcom naming)
    • Solder wires directly to the broken out pins or solder a male header (not included)
    • Uses a low-profile header fitted to the breakout PCB and an extended female header (not included) that you simply push through the holes (see photos)
    • Plug your HAT or other addon board into the pins of the extended header
    • Matte black PCB with gold plated contacts
    Contents:
    • PCB with pre-fitted GPIO header (male header and extended female header NOT included
    • All RoHS compatible and gold-plated
    Part of the Basic Building Blocks range from 4tronix which enables stacking multiple addons. As with all products in the range, the GPIO header is pre-fitted, leaving you to solder the through-hole components.

    NB. Some HATs using low-profile headers may not make as good contact with the header. In that case, you will need to screw the HAT firmly into supporting pillars (not included).
    Add to Cart
    £21.80
  • Bit:Bot Robot for BBC Micro:Bit (BitBot for MicroBit) (BITBOT)
    Bit:Bot Fully Integrated Robot for the BBC Micro:Bit

    NB. BBC Micro:Bit is NOT included unless specifically selected with the checkbox

    This (almost) ready-assembled robot requires no soldering, no wires and nothing more than a screwdriver to complete it.

    The Bit:Bot fully engages children and adults alike, allowing you to explore and code the BBC Micro:Bit using any of the languages available (not all features are supported in all languages)

    Learn here how to control the Bit:Bot with your Bluetooth phone

     *NEW* There is now a Microsoft PXT package for Bit:Bot (thanks to Sten Roger Sandvik, @stenrs on Twitter). Go to the Advanced tab or the Tools gear icon and select Add Package, then search for BitBot
     

    Check out these features:
    • 2 micro-metal gear motors. Both fully controllable in software, for both speed (0 to 100%) and direction (forward or reverse)
    • Wheels with rubber tyres for maximum grip
    • Really smooth metal ball front caster
    • 12 mini neopixels in 2 sets of 6 along the arms either side. Select any colour for any pixel, produce stunning lighting effects as your Bit:Bot moves around
    • 2 digital line following sensors. Code your own line-following robots and race them to see whose code produces the fastest lap time!
    • 2 analog light sensors (front left and front right) so your Bit:Bot can be programmed to follow a light source such as a torch, or you could code it to go and hide in the darkest place it can find
    • Buzzer, so you can make beeping sounds whenever you want
    • Powered from integrated 3xAA battery holder with on/off switch and blue indicator LED
    • Easily plug your BBC micro:bit in and out using the edge connector
    • Extension port for addition neopixels (such as McRoboFace)
    • Expansion connections at the front for additional sensors (Ultrasonic rangefinder available now, more in development)
    Optionally, you can add an Ultrasonic Distance Sensor (rangefinder) module. The sensor can be either soldered to the module, or connected via a socket. No soldering is required for either version. The socketed version makes it easier to connect a micro-USB lead to the Micro:Bit, but the soldered version is more robust.

    We also have an option for a pen holder that is fitted at the back. This can be plain, or have LEDs on to create a glow ring effect around the pen

    See our detailed blog entry for example code snippets and application ideas
    Add to Cart
    £30.00
  • Picobot2 - Cool, Smart Robot for Kid-Friendly Learning and Coding (PB2x-xx)

    Picobot2
    Kid-Friendly, Low-Cost, Educational, Feature-Rich, Programmable Robot

    Got a budding geek? There is nothing more exciting than a fully programmable robot to capture the imagination and learn the skills of coding robot building

    Build, Play, Learn

    Within a few minutes of opening the box you will have assembled the Picobot2 and will have it running around performing its built-in actions.
    • Build your own robot with kid friendly, easy steps to assemble the complete robot - 4 screws, push on the wheels and off you go!
    • Play with the built-in example programs to follow lines, seek out light sources, avoid obstacles or stay close to you
    • Learn coding by extending the example programs using the full-featured library

    Included Examples
    • Line following
    • Obstacle avoidance
    • Light seeking
    • Light avoiding
    • Colour reaction to environment Light vs Distance, Colour vs Light received, etc
    • Follow my leader (pulse the rear LED and get second Picobot to follow a pulsing white light)
    • Stay fixed distance from object/person - eg. get it to follow you around

    Base Model Comprises All you Need to get Going
    • Ready assembled circuit board with motors and lots of sensors - pre-programmed with examples
    • Acrylic case - 4 screws to fit it together
    • Rechargeable battery
    • Wheels
    • USB cable for charging and programming

    Technical Specification
    • Arduino UNO compatible ATMega328P-AU
    • 2 x N20 geared motors with "biscuit" 42mm diameter wheels
    • 400mAh rechargeable (Lipo) battery
    • 2 front light sensors
    • 2 line sensors
    • 2 fully independently controllable RGB LEDs underneath for mood lighting and status information depending how you want to program them
    • Integrated smart battery charger with LED status indicators. Charges the battery intelligently and switches off the charging when complete
    • Mode selection button - general purpose input button that you can program yourself
    • On - Off switch
    • Reset button
    • Ultrasonic distance sensor HC-SR04
    • 5V boost regulator to keep the Ultrasonic going right to the end of the battery life

    Available Options - Factory Fit Only:
    • Bluetooth Smart (Bluetooth Low Energy BLE) module using Nordic nRF51822 chipset
    • Wifi module using the ESP8266 chipset
    • Only one module can be fitted as they both use the same physical and electrical connections
    • The Wifi module uses a lot of power and so will significantly reduce the battery life between charges
    • Note that the Bluetooth and WiFi modules are not supported in the Picobot2 library directly and there are no specific Smartphone apps, but examples are available showing how they can be used

    For getting started, assembly, programming and fun ideas, please see 4tronix.co.uk/picobot2



    Add to Cart
    £36.00
  • CrumbleBot Mk2 Robot for Crumble (CrumBot2) (CRMBOT2)
    CrumbleBot Mk2 Robot for Crumble Adventures and Experiments

    The CrumbleBot Mk2 is an ideal way to introduce young (and old) children to robotics using the fantastic Crumble controller.

    All programming with the Crumble is extremely easy: drag, drop and click is all that is required to accomplish hundreds of simple and more complex tasks

    CrumbleBot Mk2 builds on the success of the Mk1 with lots more features:
    • 8 Super-bright RGB LEDs - 'Sparkles'
    • 2 push-button switches
    • Easy to use Buzzer
    • Simple jumper connection system - removes the need for croc clips
    • "Wire-free", low-profile battery holder (no USB connectors or wires to get broken)
    • Modified motor mounting positions to reduce dust ingress into the gearbox
    • Improved, smooth-running, front caster
    • Powered front accessory connector
    • Additional mounting holes near rear to allow fitting of a "second deck"

    With this robot kit you can do experiments for:
    • Basic movements (forward, reverse, left spin, right spin)
    • More complex turns (by moving one motor slower than the other)
    • Line following using the built-in line sensors with indicators
    • Light seeking or light avoiding using the built-in light sensors
    • Using the built-in Sparkles to give indications of what is happening
    • Use the built-in push-button switches to start/stop the program, change mode or anything else you want

    Simple programs to accomplish line following and light seeking are shown in the pictures for the listing.

    Crumble controller is NOT included unless option is selected

    Assembly and Coding Instructions here

    Optional Addons available:
    • Ultrasonic distance sensor - simply screws on to the front powered accessory connector
    • Pen holder (with or without "halo" LEDs)

    Add to Cart
    £30.00
  • Robo:Bit Mk2 Buggy for BBC Micro:Bit (RoboBit for Microbit) (RBITBUG)
    Robo:Bit Mk2 DIY Buggy for the BBC Micro:Bit

    NB. BBC Micro:Bit is NOT included unless specifically selected with the checkbox

    This little buggy can be assembled very quickly using only a screwdriver. No soldering is required

    Improvements over Mk1:
    • Stronger motor sub-chassis with no structural solder joints
    • Wire-free battery pack
    • Easier to attach battery holder
    • Current limit on motors to prevent stall current resetting the Micro:Bit
    • Solid bolt-on ultrasonic attachment

    It comprises several packs that are also available separately:
    • Robo:Bit Mk2 robotics controller PCB
    • Fixings pack (battery holder, screws, mounting pillars, caster, etc.)
    • Wheels Motors and wheels
    • Optional extra: Line sensor pack
    • Optional extra: Ultrasonic distance sensor module
    • Optional extra: McRoboFace - simply push the 4-pin connector of the McRoboFace into the 4 holes at the front of the Robo:Bit
    Using the basic kit you can learn about:
    • Controlling motors with simple Forwards / Reverse controls
    • Controlling the speed of motors in both directions using PWM
    • Use a second BBC micro:bit with the easy-to-use radio software to control the buggy
    • Use the motion sensor on the micro:bit to detect collision with obstacles and avoid them
    With the Plug-in Ultrasonic Distance Sensor:
    • Detect when obstacles get close and change the program to avoid the obstacles
    • "Follow-Me" program that tries to stay a certain distance from the object in front
    With the Line Follower Sensor Pack:
    • Use the 2 line sensors either side of the non-reflective line to detect the line and keep the buggy on track
    • Write more complex programs that behave as required if you meet a T-Junction or crossing of lines
    • Compare different line following strategies - create a race-track and see which strategy is fastest
    • In combination with the distance sensor, make it avoid obstacles on the track and then re-acquire the line

    Assembly instructions in our blog
    Add to Cart
    £24.00
  • Flame Gizmo for Playground - Smart Pixel (GIZFLAME)
    Flame Gizmo for Playground - Analog Input

    The Playground system is an easy way to connect from Crumble, Raspberry Pi or BBC micro:bit to useful Gizmos

    The Flame Gizmo provides single "Smart Pixel" which is called a "Sparkle" on the Crumble and a "neopixel" on the micro:bit. Simply use one of the connection cables to connect from the Playground to the Gizmo

    This Gizmo has both an input connector and an output connector so they can be daisy-chained to make a long chain of super-bright pixels!
    Add to Cart
    £2.50
  • Ultimate Crumble Starter Kit (CRMULT)
    Ultimate Crumble Starter Kit

    The Crumble is a cheap, easy-to-use electronics controller. A few ‘croc’ leads and a USB cable are all you need to connect motors, LEDs and sensors and begin experimenting. No programming experience is required as the FREE software is a graphical, drag-and-drop system inspired by MIT Scratch.

    This Ultimate Starter Kit Comprises:

    Crumble controller is NOT included unless option is selected

    Basic Kit
    • 4tronix Battery Crumb (with switch, fuse and indicator LED
    • 2 x Sparkles (RGB colour pixels)
    • 12 x Crocodile clip leads (2 of each: Black, Red, Yellow, Green, Blue, White)
    • Extra cost option: Crumble controller (the bit that does the magic!) with USB Lead
    • NB. The Crumble is not always included because many customers already have one
    + 5 Blue Digital Input Crumbs
    • Button/Switch Crumb
    • Reed Crumb (Magnetic switch)
    • Capacitive Touch Sensor Crumb
    • Proximity Sensor Crumb
    • PIR (Crumb (passive infrared motion sensor)
    + 4 Yellow Analog Input Crumbs
    • Dial Crumb
    • Slider Crumb
    • Light Sensor Crumb
    • Motion Sensor Crumb
    + 2 Black Digital Output Crumbs
    • Traffic Light Crumb
    • Buzzer Crumb
    + 3 Red "Analog" Output Crumbs
    • Motor Crumbs with wheel
    • Servo Crumb
    • Number Crumb
    + Presented in a solid plastic parts case

    See our article on getting started with Crumble and Crumbs

    Download Crumble Software here

    Crumble Getting Started Guide

    The Crumble is an easy-to-use programmable controller. It can drive 2 motors forwards and backwards at variable speeds. It has 4 IO (Input/Output) pads which allow connections to switches, LDRs, low power LEDs and so on.

    Basic Connections

    The Crumble has been designed to encourage tinkering, using ‘croc leads’ for quick and simple connections. Pads allow terminal blocks to be fitted or a direct solder connection made, while the larger 4mm holes make an easy target for conductive thread and needle.

    Crumble with croc leads

    The Crumble software runs on PC, Mac and, in the near future, Linux (including the Raspberry Pi). Inspired by MIT Scratch, programs are simply built by snapping blocks together on screen. Sending a program to the Crumble is almost instant, allowing rapid experimentation.

    The Crumble can be extended with digitally controlled full-colour LED, called Sparkles. Additionally, several expansions board (Crumbs) are also in the works.

    Add to Cart
    £65.95
  • Servo Crumb for Crumble Controller (CRSERVO)
    Servo Crumb for Crumble
    (AnalogOutput Crumb)

    This Crumb is fully compatible with the Crumble Controller and makes it easy to use Croc Clips to move the servo arm from -90 degrees to +90 degrees.

    The Crumble software can directly drive this servo Crumb using the servo commands to move 90 degrees left and right

    A micro servo is ready assembled onto the Crumb, but other servos can be connected instead if required to the 3-pin standard servo header.

    Crumb Colour Coding:
    Yellow: Analog Input
    Red: Analog Output
    Blue: Digital Input
    Black: Digital Output

    See our Crumble QuickStart Guide
    Add to Cart
    £5.50
  • Line Sensor Pack for Robo:Bit Buggy (RBITL)
    Line Sensor Pack for Robo:Bit Buggy

    NB. Robo:Bit not included

    This pack adds twin line following sensors to your Robo:Bit buggy. SImply screw together and plug in the included cables.
    This pack includes:
    • 2 x 30mm pillars
    • 4 x 6mm screws
    • 2 x Line Follower sensors
    • 2 x 10cm GVS cables
    Add to Cart
    £5.00
  • Ultrasonic Distance Sensor for Bit:Bot (BitBot) (BITSON)
    Ultrasonic Distance Sensor for Bit:Bot

    NB. Bit:Bot not included

    Ready-Soldered, just attach to your Bit:Bot with the screws provided and off you go.

    Use Microsoft PXT (or MicroPython with some awkward code) to read the distance to an obstacle, then program your Bit:Bot to avoid it.

    Both Ping and Echo signals are on the same pin (Pin 15)

    This accessory is available in 2 flavours:
    1. With the ultrasonic sensor soldered directly to the PCB
    2. With a socket soldered on the PCB that you can plug the sensor into
    The sensor soldered into the PCB is much more robust and reliable, but has a big drawback in that you cannot access the micro-USB connector on the micro:bit unless you either remove the micro:bit or use a right-angled USB lead

    The socketed version allows most USB leads to access the micro:bit, but it isn't as robust.
    Add to Cart
    £3.50
  • Pen Holder for Bit:Bot (BitBot) or CrumbleBot (BOTPENxx)
    Pen Holder for Bit:Bot or CrumbleBot

    NB. Bit:Bot not included

    This nifty little, and extremely thin, PCB allows you to connect a pen to the back of your Bit:Bot or CrumbleBot*
    • Only 0.4mm thin, so it is very flexible, allowing it to put downwards pressure on the pen without pushing the robot off the ground
    • Rubber grommet with 10mm internal diameter - ideal for Sharpie felt tips and other pens
    • Easily fitted onto the two screws for the battery support pillars in seconds

    This accessory is available in 2 flavours:
    1. Plain PCB with rubber grommet for maximum economy
    2. Fitted with 8 bright white LEDs to produce a glow-ring effect on the top and lighting the drawing below**

    * CrumbleBot must use 3xAA battery holders as this is fitted to the bottom of the battery support pillars
    ** Powered LEDs on CrumbleBot requires the "wire-free" battery holder system
    Add to Cart
    £2.50
  • 4tronix PZM Pi Zero Motor Shim (PZM01)

    Pi Zero Motor Shim - Motor Controller for (almost) any Raspberry Pi Project


    Add Motors to (Almost) Any Pi Zero Project

    2016-01-22_0008a

    This tiny little board (38 x 16mm) can be added to a Raspberry Pi Zero (or any other Pi for that matter) to provide dual H-Bridge control of 2 DC motors.

    It is so thin (0.8mm) that it can be soldered onto the bottom of the connector (assuming you have added one to your Pi Zero), or you can solder on the female or male headers included in the kit so you can connect and remove it, however you have configured your Pi Zero.

    2016-01-22_0007a

    Above shows the PZM with a female header added so it can be plugged onto a "normal" male header as shown below, Note how the PZM sticks out from the Pi, so other boards can still be mounted as usual

    2016-01-22_0002

     

    Alternatively, you can mount it by soldering it directly to the bottom of the header, thus leaving the header free to attach other boards as shown below:

    2016-01-22_0013a

    2016-01-22_0012a

     

    Contents

    So what do you get in the package?

    • Ready assembled PZM shim
    • 3 x screw terminals
    • 3x2 Male header
    • 3x2 Female header

    pzm_kit01

     

    Programming?

    This is a 4 pin driven, dual H Bridge. 2 pins control Motor A and 2 pins control Motor B

    • Motor A is physical pins 35 and 36 (Broadcom GPIO 16 and 19)
    • Motor B is physical pins 37 and 38 (Broadcom GPIO 26 and 20)
    • For each motor:
      • One pin High and the other Low for Forward
      • One pin Low and the other High for Reverse
      • Both pins Low will stop driving the motor and allow it to slowly coast to a halt
      • Both pins High will brake the motor and bring it to a halt very quickly
    • The pzm.py library module provides basic functions for forward, reverse, spin left, spin right, turn left/right forward, turn left/right reverse
    • Download library and examples from here

     

    Wiring?

    • Put power 3V to 11V on the terminal marked VIN and GND. If you are using low power motors you can use the 5V from the Pi (note this isn't connected to the PZM board)
    • Reverse polarity protection is provided so you won't break it by putting them on the wrong way round, but it won't work until you get it right!
    • Connect one motor to Motor A and the other to Motor B
    • Done!

     

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    £5.00
  • ABS Mounting Plate (Initio deck) 180 x 120mm (BBDHOLD)
    Mounting Board with Breadboard for Arduino or Raspberry Pi
    • A great way to mount your Arduino or Raspberry Pi with a half-size breadboard
    • Ideal for GPIO experiments on Raspberry Pi as well as all types of experiments with Arduino
    • This is our universal baseplate, injected moulded from tough, black ABS
    • Breadboard Optional
    • Supports Arduino Uno, Leonardo, Mega2560, Due, Yun as well as Raspberry Pi (Rev B with mounting holes)
      • NB. For Raspberry Pi you should use an offset standoff (included) for the central mounting hole
    • Size 180 x 120mm

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    £2.45
  • Basic Essentials Starter Kit for Arduino (ARD-ESS)
    Please check our Arduino Support Website

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    • Tactile (tact) switches: 5
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