Tutorial

Bike Light Kit — Build Tutorial

Estimated build time

[PLACEHOLDER: estimated build time, e.g. "45–60 minutes"]

Tools & parts checklist

  • XP-L2 LED (19.8mm MCPCB)
  • Heat sink
  • Driver board [PLACEHOLDER: confirm final driver board choice — Type-C combo board vs. backup]
  • Two switches (power, brightness — 12mm)
  • Wire
  • Heat shrink
  • 3× harvested battery cells (13350, ~3.7V/500mAh each)
  • 3D-printed housing (your printer or a library makerspace)
  • Soldering iron
  • Wire strippers

[PLACEHOLDER: video tutorial URL — Bike Light Kit]

[PLACEHOLDER: PDF instructions file — Bike Light Kit]

Before you start: read the safety guide — this build involves a lithium cell and a hot soldering iron. If you’re building with a kid, this is the page to read together first.

[PLACEHOLDER: full step-by-step build instructions]

The tools/parts checklist above and the estimated build time are ready to go, but the numbered build steps themselves are intentionally left as a scaffold — writing real wiring/soldering steps for a lithium-battery circuit needs to come from a verified, tested build (not guessed), so nothing invented is published here.

Suggested structure for each step once the real instructions are written:

  1. Step title — one clear action per step. [PLACEHOLDER: step 1 photo or diagram]
  2. Step title — one clear action per step. [PLACEHOLDER: step 2 photo or diagram]
  3. Step title — one clear action per step. [PLACEHOLDER: step 3 photo or diagram]

Continue numbering through final assembly and a “test it” step before closing the case.

This file lives at src/content/tutorials/bike-light.md — edit it directly, no code changes needed.

Wiring diagram

Bike Light Kit wiring schematic — three 13350 cells in parallel to the driver board, which feeds the XP-L2 LED and reads two panel switches (power, brightness), with Type-C charge input

Files

STL files, the OpenSCAD source, and the wiring diagram above are all on the Downloads page. A full written + PDF walkthrough is still in progress.