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To create a light-sensitive alarm with a micro:bit, you’ll typically need a way to read light level (built-in on micro:bit via the LED matrix, or an external LDR/photocell) and a way to output an alarm sound (built-in speaker on micro:bit v2, or an external buzzer/speaker).
Best all-in-one kits (easiest)
- Kitronik Inventor's Kit for the BBC micro:bit ($52.05) — includes an LDR (light sensor) plus components for building sensor-triggered projects.
- Kitronik Alarm Clock Kit with ZIP Halo HD for micro:bit ($88.85) — designed around alarm-style projects and explores light and sound.
- Micro:bit Explorer's Kit ($101.95) or Micro:bit Explorer's Kit without Micro:bit v2 ($79.35) — broader kits with lots of guided tutorials for sensors + outputs.
Light sensor add-on (if you want an external photocell)
- Octopus Analog Photocell Brick OBPhotocell ($2.40) — a simple analog LDR light sensor module you can use to trigger the alarm at a chosen brightness threshold.
Sound/alarm output (if you need louder sound than the on-board speaker)
- Kitronik MI:power Board V2 for BBC micro:bit ($17.20) — adds portable power and a built-in buzzer for alarm beeps.
- Micro:bit Expansion Board Adapter ($12.15) — a breakout-style adapter with a mini buzzer, handy for simple alarm builds.
- Electronics Starter Kit for Micro:bit ($61.70) — a general-purpose kit for wiring components to your micro:bit (useful if you’re assembling the alarm from parts rather than a single kit).
Do you have a micro:bit **v2** (with built-in speaker) or an older micro:bit (v1.x)?
Do you want to use the micro:bit’s **built-in light sensing** (simpler) or an **external LDR/photocell** (more flexible placement)?
Showing 1-20 of 49 products · 11 unavailable products hidden
Kitronik Alarm Clock Kit with ZIP Halo HD for micro:bit
Explore time, light, and also sound with the Kitronik Alarm Clock Kit, a fun and hands-on introduction to the ZIP Halo HD. KITRONIK ALARM CLOCK KIT: The Kitronik Alarm Clock Kit with ZIP Halo HD for microbit provides a fun introduction to features of Halo HD. This kit features a modified version ...
Electronics Starter Kit for Micro:bit
With this kit, you get everything you need to start learning about connecting electronics to your micro:bit in an accessible and easy manner. Everything is connected using the supplied alligator clips, so no soldering required. This kit suitable for children as young as 10 with some adult help...
Micro:bit Explorer's Kit
Note: This is the new version of our Micro:Bit 24 Bit kit and has been updated for the new Micro:Bit V2! The Little Bird Micro:bit Explorer's Kit includes more than 24 tutorials that teach you both how to use the micro:bit with various sensors and electronics with real-world applications. Acces...
Micro:bit Explorer's Kit without Micro:bit v2
The Little Bird Micro:bit Explorer's Kit includes more than 24 tutorials that teach you both how to use the micro:bit with various sensors and electronics with real-world applications. Access to the tutorials are available on our website for free, forever! There is a speaker and microphone,...
ELECFREAKS micro:bit Jacdac Smart Exploration Kit
Description The ELECFREAKS jacdac smart exploration kit, which is based on micro:bit V2, is equipped with a variety of jacdac series sensors, including jacdac expansion boards, button sensors, light sensors, human infrared sensors, magnetic sensors, knob encoders, light ring modules, e...
Elecrow Basic Kit for BBC Micro:bit
Micro:bit is a tiny programmable computer, designed to make learning and teaching easy and fun! It’s widely used in schools around the world and can be easily coded from any web browser in Blocks, JavaScript, Python, Scratch and more. To get you off to a flying start we include an easy to follow ...
micro: Breadboard
Micro:breadboard is a micro:bit-based expansion board specially designed for STEM-starter. It comes with a 3.23*2.17” breadboard (independent packing, you need to stick them together), on which you can directly build circuit with all sorts of electronic components. All IO ports are led out in ...
micro:bit v2 Board
The BBC micro:bit v2.21 is your gateway to hands-on learning, creativity, and innovation with digital technology. This pocket-sized powerhouse packs impressive features into a board that’s half the size of a credit card. Whether you’re crafting robots, designing musical instruments, or inventing ...
Getting Started with the BBC Micro:Bit
Mike Tooley's book will show you how the micro:bit can be used in a wide range of applications from simpe domestic gadgets to more complex control systems such as those used for lighting, central heating and security applications. Using Microsoft Code Blocks, the book provides a progress...
ELECFREAKS PlanetX LED - Green
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A green LED module from the ELECFREAKS PlanetX sensor range, designed for use with micro:bit and the Nezha expansion board. The RJ11 connector makes it simple to plug in — no soldering or breadboard required. Control brightness via analogue input, create flashing patterns, or combine with other ...
micro:bit Smart Home Kit (with micro:bit board)
Smart home Kit is a product about smart home project base on micro:bit which is developed by ELECFREAK. We selected executed components commonly used at home as TMP36 temperature sensor, sound sensor, crash sensor, servo, motor. You can build scene like windowsill, wardrobe and fish tank, crea...
Environment Science Expansion Board V2.0 for micro:bit
The Environment Science Expansion Board V2.0 is a micro:bit add-on designed for STEAM education, integrating 14 environmental sensors and modules onto a single tree-shaped board. Students can measure UV levels, temperature, humidity, air pressure, air quality, water quality, soil moisture, sound,...
DIY Light Controlled Phonograph Kit For Micro:bit
The DIY Light Controlled Phonograph Kit is a hands-on STEM project that combines woodworking assembly with basic electronics and programming. Built on a basswood structural base, this phonograph uses a photoresistor to detect light levels and an 8002B power amplifier to drive audio playback, lett...
micro:bit v2 Club Kit - Go Bundle 10-Pack
This micro:bit v2 Club Kit contains ten, count em', ten micro:bit v2 Go Bundles that provides you with everything you need to get hooked up and powered. This kit includes the micro:bit v2, a short USB cable, a AAA battery holder and AAA batteries. Also inside the Go Bundle you will find a Quic...
micro:bit v2 Go Bundle
The BBC micro:bit v2 is a pocket-sized computer that lets you get creative with digital technology. Each order contains just the micro:bit v2 board. You can code, customize and control your micro:bit from anywhere! You can use your micro:bit for all sorts of unique creations, from robots to music...
Micro:bit Smart Home Kit (without micro:bit board )
The ElecFreaks Smart Home Kit is a micro:bit project kit for building interactive smart home models. It includes sensors, actuators, and cardboard building materials to create miniature scenes — a windowsill, wardrobe, fish tank, and more — all programmable with MakeCode or MicroPython via the mi...
micro:bit v2 Go Bundle
The BBC micro:bit v2.21 Go Bundle is the perfect way to jumpstart your journey into coding, creativity, and digital innovation. This pocket-sized computer is packed with features, making it ideal for all sorts of projects—from building robots to crafting musical instruments and much more. What’s...
Micro:bit Honeycomb Smart Wearable Programmable E-Textile
Upgrade your coding and E-Textile Project with the Keyestudio Micro:bit Honeycomb Ultimate Kit. This smart wearable kit allows you to write code and control various sensors and modules with the Micro:bit main board and Microsoft's online graphical programming platform, MakeCode. With easy-to-use ...
Mini Piano Module for Micro:bit
Feeling musical? Limited by the lack of sound on your micro:bit?This fun little module will add light and sound to your micro:bit project.It has 13 capacitive touch keys which you can use as a mini piano to unleash your inner Mozart!There are 4 WS2812B RGB LEDs controlled by a single ...
STOP:bit - Traffic Light for BBC micro:bit
The Kitronik STOP:bit is a pre-assembled traffic light board designed for the BBC micro:bit. It replicates a real traffic light with three 10 mm LEDs (red, amber, green) driven directly from the micro:bit's I/O pins (P0, P1, P2), making it ideal for pedestrian crossing and traffic management codi...
