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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 41-60 of 67 products · 33 unavailable products hidden
Sphero RVR+ Programmable Robot
RVR+ is Sphero’s revolutionary take on the programmable robot and is optimised for high school classrooms and makerspaces. It’s drivable right out of the box, packed with a diverse suite of sensors, and built for customisation. RVR+ is expandable and made for novice to advanced programmers. Stud...
Kitronik Discovery Kit for Raspberry Pi Pico (Pico Included)
Take your first steps in Python and physical computing with the Kitronik Discovery Kit for Raspberry Pi Pico (Pico Included). The Kitronik Discovery Kit for Raspberry Pi Pico (Pico Included) is a great way to learn about microcontrollers, Python coding, and physical computing. The kit is suppl...
ProtoSnap - LilyPad Development Board
The ProtoSnap series is a new way to prototype your project without a breadboard. Everything is wired together on a single board, which makes it easy to explore the possibilities of the components before snapping them apart and building them into your project. The ProtoSnap LilyPad Development...
Lithium Ion Battery - 110mAh
This is a very small, extremely light weight battery based on Lithium Ion chemistry. This is the highest energy density currently in production. Each cells outputs a nominal 3.7V at 110mAh! Comes terminated with a standard 2-pin JST-PH connector - 2mm spacing between pins. These batteries require...
SparkFun Picoboard Starter Kit
The SparkFun PicoBoard Starter Kit is your go-to source to begin learning everything about the SparkFun PicoBoard and the Scratch programming environment. This kit includes your very own PicoBoard, multiple pieces of hardware to get you started, and connecting components to get you hooked up. ...
Cubelets - Maximum Cubelet
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The Maximum Cubelet is a "Think" block in the Cubelets robot construction system. It accepts multiple input values and passes along only the greatest one, acting as a filter for sensor data. Use it to build robots that respond only when a sensor exceeds a threshold — for example, pairing it with ...
Circuit Sticker Add-on Sensors and Microcontroller Kit
Circuit Stickers are electronic stickers that you can use to build glowing, sensing, and interactive projects without any complicated equipment or programming skills. All you need is your imagination. And this is an add-on sticker kit for Circuit Sticker Starter kit, with sound se...
DIY Ornament Kit - 6cm Diameter - Perfect for Circuit Playground
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Have you put up with mainstream, uninspiring, low-tech tree ornaments for too long? This season why not deck the halls with codes of holly? This DIY Ornament Kit is just the right size (6 cm diameter) for a Circuit Playground Express, 500mAh LiPoly battery, and however you'd like to dress up ...
Adafruit CharliePlex LED Matrix Bonnet - 8x16 Cool White LEDs
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The Adafruit CharliePlex LED Matrix Bonnet features a 16×8 grid of cool white LEDs driven by the IS31FL3731 charlieplex driver over I2C. Simply plug it onto any Raspberry Pi with a 2×20 header for a bright, programmable 128-LED display — no soldering required. Each of the 128 LEDs supports indiv...
Adafruit CharliePlex LED Matrix Bonnet - 8x16 Yellow LEDs
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The Adafruit CharliePlex LED Matrix Bonnet features a 16×8 grid of yellow LEDs driven by the IS31FL3731 charlieplex driver over I2C. Simply plug it onto any Raspberry Pi with a 2×20 header for a bright, programmable 128-LED display — no soldering required. Each of the 128 LEDs supports individua...
Adafruit CharliePlex LED Matrix Bonnet - 8x16 Blue LEDs
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The Adafruit CharliePlex LED Matrix Bonnet features a 16×8 grid of blue LEDs driven by the IS31FL3731 charlieplex driver over I2C. Simply plug it onto any Raspberry Pi with a 2×20 header for a bright, programmable 128-LED display — no soldering required. Each of the 128 LEDs supports individual ...
Adafruit CharliePlex LED Matrix Bonnet - 8x16 Green LEDs
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The Adafruit CharliePlex LED Matrix Bonnet features a 16×8 grid of green LEDs driven by the IS31FL3731 charlieplex driver over I2C. Simply plug it onto any Raspberry Pi with a 2×20 header for a bright, programmable 128-LED display — no soldering required. Each of the 128 LEDs supports individual...
UNIHIKER K10 AI Educational Tool for Beginner (Image Detection, Voice Recognition, TinyML)
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The UNIHIKER K10 is an AI learning device designed for education, serving as both a STEM AI kit and a TinyML education kit for teens. It integrates a 2.8-inch color screen, Wi-Fi, Bluetooth, a 2MP camera, microphone, speaker, RGB light, temperature sensor, humidity sensor, light sensor, an...
Serial Bus 360° Pan-Tilt Camera Module – High-Torque, 2-Axis, Robot Compatible
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Elevate your robotics and surveillance projects with the cutting-edge 360° Omnidirectional High-Torque 2-Axis Expandable Pan-Tilt Camera Module. Engineered for versatility and precision, this module is powered by robust serial bus servos and anchored by a general driver board designed with roboti...
RGBW Neon-like LED Flex Strip - Cool White 5500K - 1 meter
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A flexible, neon-like RGBW LED strip encased in translucent silicone rubber for a smooth, diffused glow. This 1-metre strip produces a neon-style effect without the need for glass tubing or high-voltage transformers — just connect 9–12V DC and it lights up beautifully. The strip features four co...
Cubelets - Inverse Cubelet
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The Inverse Cubelet is a "think" block in the Cubelets modular robotics system. It calculates the opposite of the values it receives — averaging its inputs and outputting one minus that average. Use it to create robots with inverted behaviours, like driving faster in the dark or slowing down in b...
Cubelets - Drive Cubelet
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The Drive Cubelet is an action block in the Cubelets robot construction system. It contains a motor and roller wheels that move along a horizontal surface — higher input values drive it faster, while a value of zero brings it to a stop. Cubelets are magnetic blocks that snap together to create r...
Cubelets - Rotate Cubelet
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The Rotate Cubelet is an action block in the Cubelets modular robotics system. One face spins at a rate determined by the block's input values, allowing it to act as a motor output in snap-together robot constructions. Cubelets are magnetic blocks that snap together to create robots with emergen...
Gravity: Digital Colorful Flashing LED Module
Gravity Colorful LED is an LED twinkles with seven colors--the colors of rainbow. It is easy to light up the LED. Turn on the power, then the LED will light up without programming. The built-in controller controls the colors and duration randomly, which makes it shine like a colorful star....
Garmin LIDAR-Lite Optical Distance LED Sensor - V4
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The Garmin LIDAR-Lite V4 LED is a compact, low-power optical distance sensor that measures up to 10 metres using lensed LED light (not a laser, despite the name). Drawing only 85 mA during acquisition with measurement rates up to 200 Hz, it's an ideal alternative to ultrasonic sensors for robotic...
