Ed Nieuwenhuys
Project Overview

Word clock on Arduino Nano ESP32 — single or four-language, BLE / WiFi / NTP / OTA

One PCB + one source for both 12 V B/W and SK6812 / WS2812 RGB(W) LED strips

Word clock on ESP32-C3; explains BLE nRF52 + WiFi code architecture

ESP32 add-on that feeds NTP time to an existing ATMEGA B/W word clock via serial

Four-language word clock on the CYD (ESP32-2432S028R) touchscreen display

White LED word clock on Arduino ESP32 controlled with shift registers

Software for a 23 cm clock with RGB(W) LEDs behind the illuminated words

Selector page to compare and choose word clock / Fibonacci clock hardware + software combinations

UART serial example programs for NimBLE library V1.4.3 and V2.x.x

Connects to iPhone BLE TimeSender app and Arduino BLEautoConnect sketch to receive time

Dutch word clock with white 2835/3528 LEDs; ATMEGA328/1284, shift registers, DCF77, Bluetooth

Colour word clock with SK6812/WS2812 LEDs; ATMEGA328/1284/1280, multi-language, DCF77

Four-language word clock (NL / DE / FR / UK) with SK6812 LEDs, Nano Every

Word clock with white LEDs controlled by ATMEGA328 and ATMEGA1284 using shift registers

Original Fibonacci clock software for ATMEGA / Arduino Nano

Fibonacci stick / square-tube clock; Arduino Nano, ATMEGA328, WS2812 / SK6812

Fibonacci clock on ESP32-C3-supermini or S3-Zero, BLE + WiFi / NTP

Fibonacci clock on Arduino Nano ESP32 — the preferred current platform

Round 12-segment Fibonacci clock

Word/time display on flip disc modules, driven by Nano ESP32

Word clock and analogue watch face on the Lilygo TTGO T-Watch 2020

Word clock and analogue watch on the Lilygo T-Watch 2020 V3 (ESP32-S3)

Word watch on the Pocuter (ESP32-C3) tiny wearable computer with UART BLE

Word watch on the PocketScreen OLED device (SAMD21)

NTP time via ESP8266EX AT-commands for the PocketScreen watch

PCB for Arduino Nano ESP32 with DS3231 RTC, 74AHCT125 level shifter, SK6812 / WS2812 (Fritzing + Gerber files)

DCF77 decoding algorithm without interrupts (the DCFtiny method)

Standalone DCFtiny algorithm — the interrupt-free DCF77 signal decoder

DCF77 receiver + HC-12 433 MHz wireless retransmitter

DCF77 visualisation clock with three LED rings, HC-12 transmitter, Nano Every

DCF-77 receiver and 433 MHz transmitter on an ATtiny85

Tiny SK6812 RGBW library for AVR (ATMEGA) boards

SK6812 / WS2812 library for ESP32 Arduino core V3.x using the RMT peripheral

Drive WS2812 and SK6812 LED strips with ESP32 V3 using the RMT hardware peripheral

Fork of the Adafruit NeoPixel library adapted with ESP32 support

Ed's own DCF77 library for Arduino

Logit regression in Excel for ELISA and RIA dose-response calibration curves

Parallel Line Assay (PLA) in Excel for up to 13 samples

Overview page for all laboratory calibration programs

Drive a NEMA17 (DRV8825) or 28BYJ-48 (ULN2003) stepper motor; KY-040 rotary controls speed and microstepping

Send and receive 433 MHz RF signals to control ELRO AB440R wireless power switches

English and Dutch word clock rendered in HTML / JavaScript — runs in any browser without hardware

Over-the-Air web updater for ESP32: uploads .bin files via WiFiManager — no USB cable needed

Fork of the unified nixie tube socket library — 30 socket designs with standardised pinout

1×3 and 4×3 membrane keypad controlled with a single wire to the analog pin

AutoIt script that copies changed files from source to destination backup folder on Windows

Auto-connects to BLE UART clients and broadcasts current time and date

Use BLE on a mobile phone to control the ESP32

Bluetooth Serial library for HM-10 (CC2541) and compatible BLE modules

Check up to 8 DS3231 RTC modules via TCA9548 multiplexer on Nano ESP32 / ESP32-C3 / S3

Template sketch covering WiFi, NTP, WPS, OTA, SoftAP, DNS, HTML page and BLE UART menu

Website source for Ed's European & Australian spider photography and identification database

C# Windows utility that monitors changes to files in any folder or network share

Archive of C programs written 1990–2000 during the Lattice / Borland C era

PCB for Arduino Nano ESP32 with DS3231 RTC, 74AHCT125 level shifter, SK6812 / WS2812 (Fritzing + Gerber files)