VS.

Electronics Lab

Technical journal of my hardware experiments.

April 25, 2026

The IoT Smart Lamp: Phase 1

Started prototyping a smart lamp using an ESP32 and a WS2812B LED ring. The goal is to sync the light with my VS Code theme.

[ESP32:GPIO2] ----> [DIN:WS2812B]
[ESP32:GND] ----> [GND:WS2812B]
[ESP32:5V] ----> [5V:WS2812B] (External Power Recommended)

Currently writing the MQTT subscriber logic to handle color data from a Node.js server.

April 12, 2026

Custom PCB Design for NFC Card

Designed the first iteration of the NFC card PCB in KiCad. Focused on antenna tuning for optimal range with ISO14443A chips.

<Schematic Fragment>
L1: 4.7uH Inductor (Parallel with)
C1: 180pF Capacitor
Resonant Freq: ~13.56 MHz

Sent the design to JLC-PCB. Waiting for the prototypes to arrive for testing.