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2026 Work in progress

ESP-32 Espruino GPS Tracker

A battery-powered GPS tracker built on the ESP-32 and programmed in JavaScript with Espruino — reading fixes from a GPS module and reporting position.

  • ESP-32
  • Espruino
  • GPS
  • Hardware
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Archive

⚠ Work in progress — a collection of rough notes and cheatsheets migrated from an older site. The pages are still incomplete or unedited.

ElectronicsComplex Impedance

Short-form note on impedance notation, magnitude, and measurement.

PhysicsElectromagnetics

Electromagnetics archive note with field equations and polarization references.

PhysicsTransmission Lines

Transmission-line archive note with propagation and impedance examples.