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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 50 products · 10 unavailable products hidden
micro:bit V2- an Educational Creative Tool for Kids
The BBC micro:bit V2 is a pocket-sized programmable computer designed to make learning to code fun and accessible. It builds on the hugely successful original with new onboard features including a speaker, MEMS microphone, and a touch-sensitive logo — all packed into a board just 5 × 4 cm. Progr...
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...
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...
Adafruit SPI Non-Volatile FRAM Breakout - 2 Mbit / 256 KBytes - MB85RS2MTA
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The Adafruit SPI Non-Volatile FRAM Breakout provides 2 Mbit (256 KBytes) of ferroelectric RAM (FRAM) storage over SPI. FRAM combines the non-volatile retention of flash with the instant read/write speed of SRAM — no page writes, no block erasing, and each byte can be written 10 trillion times wit...
micro:bit v2 Board
The BBC micro:bit v2 is a pocket-sized programmable computer designed for creative digital projects and coding education. Powered by a 64MHz ARM Cortex-M4 processor with FPU, 512KB flash, and 128KB RAM, it packs an impressive array of sensors and outputs into a board half the size of a credit car...
micro:bit Go (On-the-go Starter Bundle)
micro:bit is a pocket-sized microcontroller designed for kids and beginners learning how to program, letting them easily bring ideas into DIY digital games, interactive projects and robotics.micro:bit comes with a variety of on-board modules, including a 5x5 LED matrix (also supports light detect...
Elecrow Raspberry Pi Pico Advanced Kit with 32 Modules and 32 Projects Lessons
This Raspberry Pi Pico advanced kit is designed for people who already have some electronics knowledge and programming skills and are interested in the Raspberry Pi. If you want to continue to strengthen your thinking, hands-on ability， and innovation ability, the Raspberry Pi pico advanced ki...
Hummingbird Vernier BTA Sensor Adapter
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Connects Vernier's BTA analogue probes to a Hummingbird controller, which puts the science department's existing sensor cupboard to work in the robotics unit. pH, soil moisture, humidity, dissolved oxygen, force, magnetic field and a hundred other measurements can be fed straight into student cod...
Micro OLED Breakout with Headers
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Add a tiny, crisp OLED to your next microcontroller project without taking up much space. This breakout carries a monochrome Blue-on-Black display that is only 64 pixels wide by 48 pixels tall, yet still has room for useful graphics, status screens and simple game interfaces.It is easy to drive f...
Crowtail STEAM Edu Kit for Micro:bit - without Micro:bit board
The Crowtail STEAM Edu Kit for Micro:bit contains 12 common Crowtail modules, it’s a great way to build innovative projects to learn programming and electronics. All of the Crowtail modules have a standard 4 pin connectors,so it’s easy to plug them into the base shield to realize your ideas. I...
ELECFREAKS PlanetX MQ5 Sensor
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The ELECFREAKS PlanetX MQ5 Sensor is an essential sensor for environmental detection. The ELECFREAKS PlanetX MQ5 Sensor can be used to detect the leakage of flammable gas, you can use it to make a household gas leak alarm or a portable gas detector. PlanetX MQ5
ELECFREAKS PlanetX LED-Blue
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Four colors of red, yellow, blue, and green are available, which are able to light up and emit beautiful light, adjust the brightness, or flash under your control. In addition, you can also create installations by creating color combinations, such as an impressive traffic light. PlanetX LED-Blue
DS3231 Precision RTC FeatherWing - RTC Add-on For Feather Boards
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A Feather board without ambition is a Feather board without FeatherWings! This is the DS3231 Precision RTC FeatherWing: it adds an extremely accurate I2C-integrated Real Time Clock (RTC) with a Temperature Compensated Crystal Oscillator (TCXO) to any Feather main board. This RTC is the m...
touch:bit
Six handy touch-sensitive buttons and LEDs for your micro:bit. Use touch:bit as a controller for games on micro:bit's LED matrix, or combine it with the radio functionality and use it as a controller for your robot. Just slot in your micro:bit, then code touch:bit with the block-based Mic...
SparkFun MicroMod Artemis Processor
Leveraging the ultra powerful Artemis Module, the SparkFun MicroMod Artemis Processor is the brain board of your dreams. With a Cortex-M4F with BLE 5.0 running up to 96MHz and with as low power as 6uA per MHz (less than 5mW), the M.2 MicroMod connector allows you to plug in a MicroMod Carrier Boa...
Micro:bit v2.2 Bulk 20 Pack - Board only
A classroom-ready bulk pack of 20 BBC micro:bit v2.2 boards. Each micro:bit features a built-in speaker, microphone, touch sensor, accelerometer, compass, Bluetooth, and a 5×5 LED matrix — everything students need to start coding and creating interactive projects. Board-only packaging (no retail...
micro:bit Club 10-Pack
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The British Invasion is here! No, not music... microcontrollers! The BBC micro:bit is one of the newest and easiest ways to learn programming and electronics.Designed specifically for kids and beginners, the micro:bit is a pocket-sized computer that you can code, customize and control to bring yo...
ESP32-C6 WROOM Module - 16MB (PCB Antenna)
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The ESP32-C6-WROOM-1 is Espressif's first Wi-Fi 6 module, integrating 2.4 GHz Wi-Fi 6 (802.11ax), Bluetooth 5.3 (LE), and IEEE 802.15.4 (Thread/Zigbee) on a single chip. Built around a high-performance 32-bit RISC-V core clocked up to 160 MHz plus a low-power RISC-V core at 20 MHz, it offers stro...
Simon:Says for micro:bit
This is a Simon:Says board for the micro:bit. With this board you can create your own Simon Says game by programming the micro:bit.We provide a simple example should you require it or why not jump in and make one from scratch? What about a two player version using the micro:bit radio functio...
Monochrome 2.3 128x32 OLED Graphic Display Module Kit
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If you've been diggin' our monochome OLEDs but need something bigger, this display will delight you. These displays are 2.3" diagonal, and very readable due to the high contrast of an OLED display. This display is made of 128x32 individual blue OLED pixels, each one is turned on or off by the con...
