RGB LED (common cathode)
Do first: Lessons 06, 07, 09.
Each of the three colour legs needs its own resistor. Identify the common (longest) leg from the vendor drawing for your part before wiring.
Your KS0306 kit
The listing (Amazon B07KG2M7BM) identifies manufacturer part KS0306 with a micro:bit V2. This is not the KS0361/KS0365 37-sensor kit. Box revisions vary, so tick what you actually have rather than trusting any list, including this one.
Which board do you have?
V2 has a touch logo with a microphone hole beside it on the front and a speaker on the back. V1 has none of these.
What is in my box?
Quantities are not listed on purpose: count your own. This list is saved in this browser only.
Other kit parts: guided vendor walkthroughs
These parts are not in the 16 core lessons. Use the modern KS0306 manual section for each and check the prerequisites below. We do not invent wiring that has not been verified for your part.
Digit (7-segment) display
Do first: Lessons 06–07.
Every segment needs its own resistor. Pinouts vary by part number: verify against your exact component's datasheet or vendor drawing. Many segments means many pins, so check which micro:bit pins are free of the display.
LM35 temperature sensor
Do first: Lessons 05 and 10.
Check the LM35 datasheet's minimum supply voltage. Do not assume it works correctly from the 3V ring. Read the vendor manual section and get adult review first.
Thermistor
Do first: Lesson 11 (divider).
Works as a divider like the LDR, but the reading-to-temperature relation needs the part's datasheet values. Follow the vendor section.
IR receiver / flame sensor (unidentified)
Do first: Identify the part first.
Older pages call this part an IR receiver; newer ones call it a flame sensor. Compare markings with the manual for your revision. No project is offered here until you know which part you have. Never test a flame sensor with a real flame.
Some vendor guides contain outdated shortcuts. Modern first-party instructions override them. Never connect 5 V to the micro:bit rails, never wire a 5 V buzzer directly to a pin, and do not copy obsolete driver-install steps.
Modern KS0306 manual (primary) Vendor files on GitHub Manufacturer code + video download pack Legacy wiki (older revision)
If the download pack host is unavailable, use the modern manual instead.