Playground

Feels like I have played with various programming stuff over the years. Maybe it is worth documenting and sharing.

Projects that have spun off:

• Oct 2024: Tab Tree Tracker: a Chrome extension that visualizes your browser tab navigation history as an interactive tree structure. Track, analyze, and visualize how your browsing sessions evolve over time.

• Mar 2025: BPM (Beam Propagation Method): a toy Python library for simulating beam propagation in integrated photonics using the Beam Propagation Method (BPM).
  • Try it: huggingface.co/spaces/jwt625/BPM.

• Jun 2025: VoiceModeTranscript: a real-time transcript recorder for ChatGPT voice conversations with dual audio capture, whisper.cpp streaming, and intelligent LLM deduplication.

  • actually works for any mic and system audio transcribing

• Aug 2025: Bay Bridge Traffic Cam: a comprehensive real-time traffic detection and monitoring system for Bay Bridge with Prometheus + Grafana integration and public dashboard access.

  • Dashboard: bay-bridge-traffic.com.
  • Example: YouTube.

• Nov 2025: 3dgs-viewer: simple 3d gaussian splatting viewer based on spark.
  • Try it: outside5sigma.com/3dgs-viewer.

• Nov 2025: GDSJam: Web-based live collaborative GDSII viewer for semiconductor layout visualization.
  • Website: gdsjam.com.

• Dec 2025: psh (Programmable Snippet Helper): a text expansion tool with directive-based syntax for dynamic snippet expansion. Reuse frequently-used prompts for LLMs without repetitive typing. Type ;;d.ne,l2 instead of "be concise, no emoji" every time.

• Jan 2026: Claude Code Inspector: comprehensive tools for analyzing, tracking, and visualizing Claude Code agent workflows. Extract entities from API logs, track agent instances, build workflow DAGs, and visualize with interactive React-based viewer.

• Jan 2026: SLM Guessr: an educational web application for training intuition on Spatial Light Modulator (SLM) phase masks and their corresponding 2D FFT intensity patterns. Features progressive curriculum with 150+ samples across 7 difficulty levels, gallery mode, and quiz mode.
  • Try it: outside5sigma.com/SLM-Guessr.

• Feb 2026: WebSpice: a browser-based SPICE circuit simulator with a minimal LTSpice-like GUI. Runs entirely client-side using NGSpice compiled to WebAssembly.
  • Try it: outside5sigma.com/WebSpice.

• Apr 2026: USGS Minerals And Infrastructure Atlas: a static interactive atlas for exploring USGS National Minerals Information Center regional GIS releases across Africa, China, Indo-Pacific, Latin America & Caribbean, and Southwest Asia.
  • Try it: jwt625.github.io/USGS_Minerals_Infra_Atlas.

• May 2026: IEEE 802.3 AI / High-Speed Ethernet Cache: a static browser and local cache for IEEE 802.3 public materials relevant to AI scale-up, AI scale-out, high-speed Ethernet, P802.3dj, E4AI, 200G/lane MMF, P802.3ds, and 400G/lane signaling.
  • Try it: outside5sigma.com/ieee802_3dj_browser.

• May 2026: Optical DSP Link Visualizations: browser-based educational visualizations for optical DSP and SerDes concepts, including payload/FEC/PAM4 mapping, Tx precompensation, SerDes/DAC, optical channel impairment, CDR timing, Rx equalization, and recovered payload flow.
  • Try it: outside5sigma.com/optical-dsp-link.

• Jun 2026: 2D EO Cross-Section Solver Prototype: browser-first electro-optic modulator cross-section solver with YAML-configured geometry, 2D electrostatic extraction, tensor-permittivity RF assembly, optical mode solving, field visualization, and Python reference tests.