MicroPython rewrite of the Impression 5 giant calculator — 9-digit NeoPixel 7-segment display with 20 physical buttons, running on ESP32 or Raspberry Pi Pico.

A 12-year arc of MagiQuest wand projects — from a DigiSpark ATtiny85 duel kiosk in 2013, through NeoPixel ring upgrades and a learn/simulate device, to a 2025 ESPHome Home Assistant sensor.

ESP32 ESPHome device that monitors a Carrier furnace — reads a differential pressure sensor for filter restriction and a phototransistor to decode blink error codes from the status LED.

Secure garage door access via a Wiegand keypad wired to an ESP32 running ESPHome — PINs are stored as hashes in the config, never in plaintext.

Two ESPHome configs for a SONOFF S31 smart plug that auto power-cycles a device when it stops responding — one using ICMP ping loss detection, one using Home Assistant API connection loss.

Arduino library for reading an array of photocell (LDR) sensors with a sliding-window moving average and configurable threshold detection — supports multiple sensors with individual sample rates.

Arduino Micro Pro HID device that prevents screensavers when room lights are on — uses a dual-criteria light-change algorithm to distinguish light switches from gradual daylight changes.

Interactive museum exhibit at Impression 5 Science Center — visitors use RFID tablets to explore botanical migration routes on a lit map, with green/red LED feedback guiding correct selections.

Arduino Mega replacement for Impression 5 Science Center’s giant calculator exhibit — custom LED display and keypad controller using big-number arithmetic.

Eagle CAD Arduino Mega shield PCB designed for Impression 5 Science Center exhibits — standardizes wiring, connectors, and power for the Giant Calculator and Genome Map projects.

Raspberry Pi Zero W chore tracker — physical buttons and NeoPixel LEDs show daily task progress in a tactile, screen-free display for kids.

Non-blocking, interrupt-driven Arduino library for the VLSI VS1053 audio decoder chip — streams MP3, AAC, Ogg Vorbis, FLAC, WMA, and WAV from SD card over SPI.

Arduino firmware for the Lansing Makers Network’s Artemis Spaceship Bridge Simulator exhibit — drives a multi-joystick physical console for the cooperative spaceship bridge game.

A fully open source, 38-foot, 4-lane pinewood derby timing system built for Lansing Makers Network — Arduino Mega, custom PCB, IR sensors, solenoid starting gate, and 7-segment displays.

Arduino Mega sketch for sequenced Christmas lights using Vixen lighting software — supports daisy-chaining multiple Arduinos for up to 51 channels per board via serial passthrough.

Arduino button debouncing library — filters mechanical contact noise so a single button press registers as exactly one event in firmware.

Arduino library for measuring free RAM at runtime — critical for debugging out-of-memory crashes on AVR boards with as little as 2 KB of RAM.

The original non-blocking, interrupt-driven Arduino library for the SparkFun MP3 Player Shield (VS1053) — superseded by the generalized vs1053_for_SdFat library.