Christopher Yarbro

I write firmware, operating systems, and the software that gets data off hardware. Data engineer at Turner Construction; CS and Political Economy, Tulane '26.

Projects

• Moire
  nRF52 · C/C++ · LoRa mesh · deployed in Ecuador

  Low-cost soil-moisture sensor network for reforestation research. 15 nodes deployed in the Ecuadorian Andes. Best Project, 2026 Tulane SSE Engineering Expo.

• nrf_pcnt
  nRF52 · C · PPI · Zephyr

  A hardware pulse counter for a chip that doesn't have one, built from GPIOTE, PPI, and two timers. Counts while the CPU sleeps.

• Weenix
  C · OS kernel

  A UNIX-like kernel: processes and threads, device drivers, a virtual file system, the System V filesystem, and virtual memory.

• Traintime
  Rust · GTFS-Realtime · embedded display

  Live train arrivals for a display on my wall. Decodes transit feeds for any configured system into compact arrival packets.

Other

• Funclang: an interpreter in Rust for a small OCaml-like language.
• Data Science final project