BC337 NPN Transistor 50 Pack

The Octopus CO2 Gas Sensor, part of the OCTOPUS series, features a consistent design with the same outlook, PCB fixing holes, and connections as its counterparts. As CO2 concentration increases, the output voltage decreases, allowing users to easily obtain CO2 readings through our brochures and coding samples.

The CO2 probe is crafted from industrial-grade materials, rendering it highly responsive to CO2 while resisting interference from alcohol and CO. It excels in performance with rapid response times, even in varying temperature and humidity conditions. Additionally, the onboard heating circuit efficiently converts 5V to a stable 6V voltage, enhancing the adaptability of the CO2 Gas Sensor.

Please note that this sensor requires a breakout board for operation, and it is typically paired with the Elecfreaks IOT:BIT board by the manufacturer.

Monitor and analyse the air you breathe with the Kitronik Air Quality Board. Great for home and the classroom. The Kitronik Air Quality Board provides a complete air monitoring and reporting solution for the BBC micro:bit. The wealth of onboard sensors and connection points allow you to collect extensive air quality data that can be stored in onboard memory and displayed on the OLED screen or transferred to a computer for analysis. Kitronik has also produced online MakeCode tutorials that are designed to introduce you to all of the key features of the board, see the 'Resources section below for links.

The Air Quality Board is perfect for the classroom. Run short or long-term classroom experiments, such as; monitoring air quality throughout the year, with and without the heating on. You can then use the collected data to produce graphs and more. Alternatively, it would make a great addition to an office/workshop, let science inform you when it's time to open those windows or remind you to ventilate your work area!

The board includes an integrated Edge Connector for your BBC micro:bit to easily slot into. The onboard sensors allow readings for temperature, pressure, humidity, air quality index, and eCO2. The real-time clock (RTC) and 1Mbit of onboard EEPROM memory enable timestamped data logging and long term data storage. There are also 3 status ZIP LEDs onboard which be used for visually displaying data. 3 of the BBC micro:bit's pins (Pins 0,1, and 2) are broken out to 0.1” pitch solder pads allowing for additional sensors or outputs. There are also 3V and GND pads for providing power to these devices.

The board can be powered via either the 3xAA battery holder or the micro USB connector. The voltage supply is controlled using a power switch, with a green status LED to indicate when the board is turned on. The board also produces a regulated 3V supply which is fed into the edge connector to power the inserted BBC micro:bit, removing the need to power the BBC micro:bit separately.

The board also features a connection point for a solar cell that can be used alongside rechargeable batteries to keep your experiments running for longer. NOTE: Please ensure the correct rechargeable batteries are fitted before charging, they should be NiMh.

Kitronik has produced custom MakeCode blocks to make the task of coding as straightforward as possible. You can add our custom blocks to the MakeCode editor by clicking on the cog icon in the top right of the editor and selecting Extensions. You can then type and enter Kitronik into the search bar and then click on the tile for the Air Quality Board blocks. The custom blocks will now be added to the editor's blocks menu. These blocks can also be added to the menu via this URL; https://github.com/KitronikLtd/pxt-kitronik-air-quality

Features:

An all in one Air Quality monitoring and reporting solution for the BBC micro:bit.

Measure temperature, pressure, humidity, air quality index, and eCO2.

Pins 0, 1 and 2 are broken out to solder pads for additional I/O.

The board features a black and white 128x64 OLED display screen and 3 status ZIP LEDs for visually displaying data.

The real-time clock (RTC) and 1Mbit of onboard EEPROM memory enable timestamped data logging and long term data storage.

Online MakeCode tutorials that introduce you to all of the boards key features.

Run long term monitoring experiments in the classroom throughout the school year.

There is an integrated edge connector for the micro:bit to slot into.

The board also features a connection point for a solar cell that can be used alongside rechargeable batteries to keep your experiments running for longer.

Kitronik has produced custom MakeCode blocks for convenient and straightforward coding.

It can be coded with MakeCode/Javascript/Python.

Contents:

1 x Kitronik Air Quality Board for BBC micro:bit.

1 x 3xAA battery holder.

1 x USB Lead.

Dimensions:

Length: 68.5mm.

Width: 48mm.

Height: 28.5mm.

PCB Thickness: 1.6mm

Add line following functionality to the Kitronik MOVE mini MK2 for the BBC micro:bit with this easy to assemble add-on kit. This version of the line following add on has been designed to fit both the new :MOVE mini MK2 and the original version. The assembly instructions for both can be found in the Resources section below.

This add-on comes with all the parts required to add line following functionality to the :MOVE mini and does not require any soldering. Once built, the sensitivity of the left and right sensors can be individually tweaked to ensure smooth operation.

See the resource section below to download the line following code example we created. By default the code will cause the buggy to follow a dark line on a light background but the code can be altered to do the opposite.

There is no soldering required but the kit does require some mechanically assembly.

Features:

Add line following functionality to the :MOVE mini for the BBC micro:bit.

Can either follow a dark line on a light back ground or a light line on a dark background.

The line following sensitivity can be adjusted with a screwdriver.

No Soldering required.

Example line following code is provided.

This product is backwards compatible with the first version of :MOVE mini. There are two sets of assembly instructions in the resources section below.

Contents:

1 x :MOVE Sensor Interface for the BBC micro:bit.

1 x :MOVE Line Following board for the BBC micro:bit.

1 x Connector Cable.

2 x CS M3 8mm Screws.

2 x M3 Hex Full Width Nut.

5 x CS M3 12mm Screws.

2 x 6mm Spacers.

2 x 12mm CS Screws.

The Mini Prong soil sensor is a short version of the original Prong sensor that has been specially adapted for use with the Kitronik Greenhouse Kit for BBC micro:bit. The Mini Prong soil moisture sensor for BBC microbit is a sensor board that can be connected to a BBC micro:bit with crocodile clips to monitor the moisture present in the soil. The two conductive tines are placed into the soil. Any water or moisture in the soil will conduct to give an analogue voltage that can be read by the BBC micro:bit.

Mini Prong is powered from the 3V supply of the BBC micro:bit. Use either the USB or JST connector on the BBC micro:bit to power the circuit. The board has been designed to work with croc-clips, to connect between the Mini Prong and the BBC micro:bit. When fitted to the Mini Prong moisture sensor, the micro:bit can be coded via any of the micro:bit editors, such as the Microsoft MakeCode editor. The Datasheet at the foot of this page includes technical information and a MakeCode blocks coding example.

Note: To ensure that the mini Prong moisture sensor has a long and fulfilling life, it is better to write your code to perform a moisture check every so often rather than continuously. When the check is performed continuously it promotes rapid erosion of the electrodes.

Features:

Measure soil moisture levels.

Attach to the micro:bit with crocodile clips.

Compatible with both BBC micro:bit V1 and BBC micro:bit V2.

Write code for it with any micro:bit coding editor.

Dimensions:

Length: 33mm.

Height: 43mm.

PCB Thickness: 1.6mm.

Expand the scope of your :MOVE mini Robotics projects to include sensory input via our :MOVE Sensor Interface Board for the BBC microbit. The board acts as a breakout board for the microbit while it is attached to a Servo:Lite board and allows you to add things such as line following boards, ultrasonic sensors, and much more.

Sensory input can allow for your projects to become more autonomous as they react to their surroundings and perform actions based on this. There is no soldering required, the board is screwed directly to the BBC microbit and Servo:Lite assembly with the five screws that are supplied with the board.

Features:

Add external sensor input to the BBC microbit.

Expand the scope and function of your :MOVE mini Robots.

Adding sensors to :MOVE mini allows it to react to its environment.

Contents:

1 x :MOVE Sensor Interface for the BBC micro:bit.

5 x CS M3 12mm Screws.

2 x 5 PCB pin headers.

1 x small Kitronik keyring.

Dimensions:

Max Height: 48mm.

Max Width: 52mm.

PCB Thickness: 1.5mm.

The Prong soil moisture sensor for BBC microbit is a sensor board that can be directly mounted to a BBC micro:bit to monitor the moisture present in the soil. The two conductive tines are placed into the soil. Any water or moisture in the soil will conduct to give an analogue voltage that can be read by the BBC micro:bit.

Prong is powered from the 3V supply of the BBC micro:bit. Use either the USB or JST connector on the BBC micro:bit to power the circuit. Prong and the BBC micro:bit can also be powered from the Mi:Power board to create a compact stand-alone unit.

The board has been designed so that the BBC micro:bit can be bolted on using 3 x M3 nuts and 3 x M3 screws. Place the screws through the P1, 3V and GND holes of the PCB and BBC micro:bit, then use the M3 nuts to fasten together on the back of BBC micro:bit. Alternatively, croc-clips can be used to connect between the Prong and the BBC micro:bit.

If using the Mi:Power board then additionally connecting P0 means the BBC micro:bit can sound an alarm if the soil becomes too dry. When fitted to the Prong moisture sensor, the micro:bit can be coded via any of the micro:bit editors, such as the Microsoft MakeCode editor.

Note: To ensure that the Prong moisture sensor has a long and fulfilling life, it is better to write your code to perform a moisture check every so often rather than continuously. When the check is performed continuously it promotes rapid erosion of the electrodes.

Features:

Measure soil moisture levels.

Attaches directly to the microbit.

Use in conjunction with the Mi:Power board to provide power and an audible alarm.

Code with any microbit coding editor.

Contents:

1 x Prong Soil Moisture Sensor for microbit.

3 x M3 Hex Nuts.

3 x M3 Countersunk Screws.

Dimensions:

Length: 68mm.

Height: 53mm.

PCB Thickness: 1.6mm.

Build your own steady hand game with the Kitronik Steady Hand Terminal Project Kit. This easy-to-assemble electronics project requires no soldering, making it ideal for beginners and classroom use.

No soldering required – uses terminal blocks

Fun steady hand buzzer game project

Perfect for STEM learning and electronics education

Suitable for school and beginner projects

Add obstacle detection to your robotics, electronics, or Arduino project. This module has been specially selected to work on the voltage range typically found with the Arduino range of products. This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit.

There are only four pins that you need to worry about on the HC-SR04: VCC, Trig, Echo and GND. VCC and GND are for power and Trig, Echo and GND are for your signal. GND is in with the signal set since it's needed for a baseline. You can easily add this to your project and even use with the microbit if you use a separate 5V power supply.

Features:

Add obstacle detection to your robotics, electronics, or Arduino project.

It can also be added to micro:bit projects provided a separate power supply is used.

It provides 2cm to 400cm of non-contact measurement functionality

It has ranging accuracy that can reach 3mm.

Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit.

The pins are; VCC, Trig, Echo and GND

Dimensions:

Length: 45mm.

Width: 20mm.

Max height: 15mm.

Pin Pitch: 2.54mm

The MonkMakes Plant Monitor makes it easy to build a simple “smart plant” project with the BBC micro:bit. It measures soil moisture (using a corrosion-resistant capacitive sensor), plus temperature and relative humidity, so students can log data, set alerts, or create an automatic watering warning system.

Key Features:

3-in-1 monitoring: soil moisture, temperature and relative humidity.

Capacitive moisture sensing (no electrical contact with the soil), helping resist corrosion.

Simple micro:bit connection via alligator/crocodile clip rings.

Human-readable UART serial interface for quick integration with code.

Additional analogue output (moisture only) for optional analogue reading.

Built-in RGB LED for clear, visual status feedback.

Classroom Uses:

Plant care investigations: compare watering patterns and environmental conditions.

Data logging and graphing activities (STEM / Computer Science / Geography links).

Build rule-based alerts (e.g., “too dry”, “too humid”) using the RGB LED.

Note: As with any soil probe, keep the electronics section dry and only insert the sensing prongs into the soil.