If you just want to measure light using the built-in facility then you just need a micro:bit.

When it comes to the choice of resistor to use, I have used a 2.2kΩ resistor here, but a 1kΩ or 10kΩ resistor will also work, but will change the range of readings.

 Bundle of Small Alligator Clip to Male Jumper Wires
For bread-boarding with unusual non-header-friendly surfaces, these cables will be your best friends! No longer will you have long strands of alligator clips that are grabbing little...
$7.95
In Stock
Angled shot of half-size solderless breadboard with red and black power lines.
This is a cute, half-size breadboard with 400 tie points, good for small projects. It's 3.25" x 2.2" / 8.3cm x 5.5cm with a standard double-strip in the...
Out of Stock
Close up head of CdS light sensor showing sensor element
CdS cells are little light sensors. As the squiggly face is exposed to more light, the resistance goes down. When it's light, the resistance is about ~1KΩ, when dark it goes...
Out of Stock
Angled shot of 25 Through-Hole Resistors - 2.2K ohm 5% 1/4W.
ΩMG! You're not going to be able to resist these handy resistor packs! Well, axially, they do all of the resisting for you!This is a 25 Pack of 2.2K...
$0.75
In Stock

This guide was first published on Mar 09, 2018. It was last updated on Mar 08, 2024.

This page (Parts) was last updated on Mar 08, 2024.

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