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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 41-50 of 50 products · 10 unavailable products hidden
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...
Monochrome 2.42 128x64 OLED Graphic Display Module Kit
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If you've been diggin' our monochrome OLEDs but need something bigger, this display will delight you! These displays are 2.42" diagonal, and very readable due to the high contrast of an OLED display. This display is made of 128x64 individual white OLED pixels, each one turned on or off by the ...
Glowing House Set - BARE Conductive
IntroductionBare Paint is the first non-toxic electrically conductive paint available to consumers today! This unique child-friendly material is designed for people of all ages to explore and learn about electronics with an inclusive, easy-to-use material.Bare's House Kit contains all the compone...
Adafruit QT Py ESP32-S2 WiFi Dev Board with uFL Antenna Port
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The Adafruit QT Py ESP32-S2 with uFL Antenna Port is the extended-range version of the QT Py ESP32-S2. Instead of an on-board antenna, it features a uFL connector so you can attach any 2.4 GHz Wi-Fi antenna for significantly better range — ideal for projects where the board is enclosed in a metal...
Octopus Temperature And Humidity Sensor
Temperature and humidity sensor is a module based on DHT11 digital temperature and humidity sensing element. Simple design, and sensitive to the ambient temperature and humidity changes, it can be used for temperature alarm, humidity testing and other works.3P Octopus Bricks Interface，input 5V - ...
Espressif ESP8266EX Wi-Fi SoC
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This highly integrated Espressif Wi-Fi system-on-chip is designed for compact Internet of Things hardware that needs reliable 2.4GHz wireless networking with efficient power usage.The ESP8266EX can run as a standalone application processor or operate as a Wi-Fi adapter for a host microcontroller ...
Micro Infrared Night Vision Camera for Raspberry Pi
I am a Raspberry Pi camera that compatible with any version of Raspberry Pi. I can work with infrared lights, support infrared night vision. Even has the function of focus, you can adjust me to observe objects of different distances. if you want to buy the infrared lights, click hereFeature...
SparkFun MicroMod GNSS Function Board - ZED-F9P
With GNSS you are able to know where you are, where you're going, and how to get there anywhere on Earth within 30 seconds. This means the higher the accuracy the better! GNSS Real Time Kinematics (RTK) has mastered dialing in the accuracy of their GNSS modules to just millimeters. The SparkFun M...
Triple Output High Power RGB LED
So much power and light from such a small package. This 3W per channel, Triple Output High Power RGB LED is sure to shed a lot of light on any project you add it to. This LED acts as any other LED except they require much more power while delivering a light as intense of a thousand suns going sup...
Flexible 12V LED Strip - 480 LEDs per meter - 1m long - Green
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A 1-metre flexible LED strip with 480 green SMT LEDs per metre, soldered side-by-side in a "chip on board" configuration. Topped with a translucent silicone diffuser and encased in a sealed silicone tube, the result is a continuous, smooth light output that resembles neon tubing — without the nee...
