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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 81-100 of 100 products
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...
Snap Circuits® Jr. 100 Experiments
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This construction set empowers budding engineers to create over 100 diverse electronic circuit projects using just 30+ electronic components. Children can build functional prototypes of a photo sensor, a blinking light, an Adjustable-Volume siren, and many other exciting models! The STEM kit i...
Cubelets Twenty Kit
The Cubelets Twenty Kit is a comprehensive robot construction system designed for budding innovators ages four and up. Snap the magnetic Cubelets together and watch complex behaviours emerge — no programming required. Instead of coding each action, Cubelets use a sense-think-act approach. Sensor...
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...
Adafruit FunHouse Starter Kit - IoT Home Automation Exploration
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The Adafruit FunHouse Starter Kit gives you everything you need to build WiFi-connected home automation projects with no soldering required. Powered by an ESP32-S2 chip running CircuitPython or Arduino, the FunHouse board connects to your WiFi network and makes it easy to create internet-powered ...
Pixelblaze Sensor Expansion Board
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The Pixelblaze Sensor Expansion Board makes it easy to write patterns that use sound, accelerometer/tilt, or light to create reactive patterns. Normalized frequency data, acceleration, and light data are fed directly into your pattern as variables so you can focus on using the data instead of pro...
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 ...
CrowPi L - Real Raspberry Pi Laptop for Learning Programming and Hardware Basic Version
Note - this is the White, Basic Version and does not include a Raspberry Pi 4Due to the size and weight these can NOT be express posted outside Sydney Metro.CrowPi L is a lite version born out of CrowPi2, and "L" stands for Lite, Light, and Laptop. CrowPi L is a real Raspberry Pi computer designe...
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...
Hummingbird Duo Premium Robotics Kit
The Hummingbird Duo Premium Robotics Kit is designed for building robots, kinetic sculptures, and animatronics from a combination of kit components and everyday crafting materials. The Hummingbird Duo controller works with beginner-friendly programming environments including Scratch, Snap!, the C...
SparkFun Qwiic PIR - 170uA (EKMC4607112K)
Passive Infrared (PIR) sensors are great for detecting motion in a small area around the sensor. The 170µA SparkFun EKMC4607112K Qwiic PIR uses an EKM-series PIR sensor from Panasonic® paired with an ATTiny84 to interact with it using I2C with the Qwiic system. The EKM-series PIR sensors are opti...
SparkFun PIR Breakout - 170uA (EKMC4607112K)
Passive Infrared (PIR) sensors are great for detecting motion in a small area around the sensor. The 170µA SparkFun EKMC4607112K PIR Breakout is a simple board equipped with an EKM-series PIR sensor from Panasonic®. The EKM-series PIR sensors are optimized for small movements to offer motion-sens...
Adafruit LED Glasses Starter Kit
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The Adafruit LED Glasses Starter Kit includes everything you need to build a complete pair of programmable LED glasses. Pair the 116-LED front panel with the Bluetooth-enabled nRF52840 driver board, snap them onto the included fashion frames, and you're ready to create dazzling wearable light dis...
Panasonic® PIR Motion Sensor - EKMB1107112
Passive Infrared (PIR) sensors are great for detecting motion in a small area around the sensor. This is an EKM-series PIR sensor from Panasonic®. The EKMB-series PIR sensors are optimized for small movements to offer motion-sensing options for battery powered applications due to the low standby ...
Starter Kit for Micro:bit 2.0
The BBC Micro:bit is a pocket-sized computer that can easily realize your creativity without much electrical and coding knowledge. There are numerous possibility of creation you can dig out by micro:bit, from robots to musical instruments. However if you want to create more things, just 1 micro:b...
