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AI Overview
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 21-40 of 100 products
Micro:bit Education Kit
Dive into the world of coding, electronics, and robotics with our comprehensive Micro:Bit Education Kit. Perfect for educators, students, and makers alike, this kit includes everything you need to explore and create innovative projects including lots of tutorials! What's Included: 1 x...
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...
DIY Light-Up Blinky Bow Tie Kit - 10 Pack, Blue Shades
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Add a bit of blinky wearable-tech flair to your next party, workshop or classroom activity. This DIY paper bow tie kit combines simple electronics with craft, letting makers connect a coin cell battery and LED to create a light-up accessory.Each pack makes 10 light-up paper bow ties, with assorte...
Ring:Bit Car v2 for micro:bit (without micro:bit)
The Ring:bit Car is a small DIY smart car driven by the BBC micro:bit and the Ring:bit. The Ring:bit extends the micro:bit's 3 GPIO ports and allow for different sensors and components to be easily attached to the micro:bit. A basic Ring:bit Car can be easily programmed to run autonomously, wi...
Light & Motor Driver for Python (V1.0)
This is a PWM driver board with four adjustment methods, namely, Python code direct control, PC host computer control, UART communication programming control, and potentiometer manual control. It is used in application scenarios such as DC motor speed control and light adjustment. This produ...
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BOSON RGB LED Camping Lantern DIY Kit
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This hands-on STEM kit lets kids build a working RGB LED camping lantern while learning the basics of electronic circuits and the primary colours of light. By connecting the LED, rotary controls and battery pack with colour-matched wires, children can see how a simple circuit brings their project...
TF-NOVA Line Laser LiDAR Sensor - 14m
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Instead of measuring just one dot, the TF-NOVA projects a wide 14° by 1° curtain of laser light to create a continuous line of detection. At 1 metre, that line covers 25cm x 1.7cm, helping automated machines spot thin or awkward obstacles that a single-point sensor may miss.Built on Pulse Time-of...
RGB Full Colour Backlight Display - 84mm x 45mm
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This diffused RGB backlight is a rigid acrylic light panel like the kind normally found behind LCD displays, but with a full-colour LED instead of a plain white backlight. The acrylic spreads the light from a single LED to give a near-uniform glow across the lit area.The flat rear side includes a...
Keybow Kit (3-key) Linear (quiet) keys with Rasberry Pi Zero WH
Keybow MINI is a 3-key version of our wildly-popular Keybow mini mechanical keyboard. Like its older sibling, Keybow MINI has RGB-illuminated, hot-swap, mechanical switches, and clear key caps. It's the perfect way to add a tiny macro pad to your desk, or to use as a little osu! controller. This...
Edison Robot - EdPack30
Meet Edison v2 x 30 units!The super affordable, programmable robot. Your stepping stone into the exciting world of science and technology!Why Edison?Have you ever wanted to get into robotics, but found it too difficult or expensive?Meet Edison... Affordable – Less than US$50 each and just US...
Edison Robot - EdPack1 Meet Edison
There is a new version - available here Meet EdisonThe super affordable, programmable robot. Your stepping stone into the exciting world of science and technology!Why Edison?Have you ever wanted to get into robotics, but found it too difficult or expensive?Meet Edison... Affordable – Less than US...
Side-light Fiber Optic Tube - 5mm Diameter - 1 meter long
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This side-lighting fibre optic tube produces a glowing effect along its entire length when illuminated by a powerful LED. Unlike standard fibre optics that only emit light from the end, this tube allows light to escape along the sides, creating an even, neon-like glow. The tube is 5mm in diamete...
Yahboom Omniduino smart robot with Mecanum Wheel
Omniduino is a mini omnidirectional robot car with ATmega328P chip as the processor, which can easily achieve 360 ° movement in any direction. 5 pairs of infrared obstacle avoidance sensors are distributed around and in front of it, so that it can identify obstacles in the blind zone, thereby ach...
BlinkM - I2C Controlled RGB LED
BlinkM is a “Smart LED”, a networkable and programmable full-color RGB LED for hobbyists, industrial designers, prototypers, and experimenters. It is designed to allow the easy addition of dynamic indicators, displays, and lighting to existing or new projects. If you’ve used up all your microc...
Cubelets - Flashlight Cubelet
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The Flashlight Cubelet is an action block for the Cubelets modular robotics system. It emits a focused beam of white light from a powerful LED, with brightness proportional to its input value — high input means bright light, zero input means off. Cubelets are magnetic building blocks that snap t...
Arduino Starter Kit
The Starter Kit is a great way to get started with Arduino, coding and electronics! The Starter Kit includes the components you need to make 15 fun projects following the step-by-step tutorials on the Project Book.The Starter Kit walks you through the basics of using the Arduino in a hands-on way...
DFRobot 5V COB LED Strip Light - Yellow
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This compact COB light strip is a bright yellow 5V lighting module for decorative and embedded illumination projects. It uses 16 LED chips under silicone encapsulation to create a smooth, continuous luminous surface with minimal hotspots and shadowing.The low-voltage DC 5V input makes it practica...
SparkFun Buck Regulator Breakout - 5V (AP63357)
The SparkFun 5V Buck Regulator Breakout features the AP63357 from Diodes Inc., a 3.5A synchronous buck converter with a wide input voltage range of 3.8V to 32V. The fully integrated 74mΩ high-side power MOSFET/40mΩ low-side power MOSFET provides a high-efficiency step-down DC/DC conversio...
SparkFun Buck Regulator Breakout - 3.3V (AP3429A)
The SparkFun 3.3V Buck Regulator Breakout features the AP3429A from Diodes Inc., a 2A step-down DC-DC converter with an input voltage range of 2.7V to 5.5V. This full-size, 1in. x 1in. version of our buck regulator boards is configured to provide a regulated 3.3V output (from a 3.9 to 5.5V input ...
Colourful Lamp Starter Kit For Micro:bit
Introducing the latest addition to our learning kits collection - the Colourful Lamp Starter Kit for Micro:bit! Made with high-quality bass wood, this kit is specially designed to provide a fun and engaging learning experience.Featuring an RGB module and IR receiver, this kit is compatible with b...
