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.

BBC micro:bit

PRODUCT ID: 3530
The British Invasion is here! No, not music...microcontrollers! New to the USA is the newest and easiest way to learn programming and electronics - the BBC...
$14.95
IN STOCK

Small Alligator Clip to Male Jumper Wire Bundle - 12 Pieces

PRODUCT ID: 3255
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

Half-size breadboard

PRODUCT ID: 64
This is a cute half size breadboard, good for small projects. It's 2.2" x 3.4" (5.5 cm x 8.5 cm) with a standard double-strip in the middle and two power rails on both...
$5.00
IN STOCK

Photo cell (CdS photoresistor)

PRODUCT ID: 161
CdS cells are little light sensors. As the squiggly face is exposed to more light, the resistance goes down. When its light, the resistance is about ~1KΩ, when dark it goes up to...
$0.95
IN STOCK

Through-Hole Resistors - 2.2K ohm 5% 1/4W - Pack of 25

PRODUCT ID: 2782
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...
OUT OF STOCK
This guide was first published on Mar 09, 2018. It was last updated on Mar 09, 2018.
This page (Parts) was last updated on Jun 17, 2020.