Electronics Tools
Free tools for electronics makers — LED calculators, resistor tools, systemd generators, battery calculators and more.
A morphing digital clock with a rainbow-cycling Matrix rain background on a 64×32 RGB LED panel driven by Raspberry Pi and Adafruit RGB Matrix HAT + RTC. Time syncs from NTP over WiFi, falls back to onboard PCF8523 RTC when offline, and free-runs off system clock in between — the display never stutters for a network check.
Enter your WiFi credentials, select security type and band — get ready-to-paste config code for ESP32, ESP8266, Raspberry Pi, Python, Node.js, Flutter, iOS, Android, Windows and Linux.
Select any country or timezone — get ready-to-paste code snippets for Arduino, ESP32, Raspberry Pi, Python, Node.js, PHP, Java, Swift, Flutter, Windows, Linux and macOS
Pick colors and instantly generate ready-to-paste palette codes for every major platform. Export flawless CSS, Swift, Android XML, Flutter, and Tailwind values.
Generate a ready-to-run systemd service installer for any Python bot or script on Raspberry Pi. Fill in your script path, username, and virtual environment — download a shell script that installs your service, enables it on boot, and shows all management commands. Auto-restarts on crash, captures all logs, runs inside your venv.
Single LED, series, parallel, or reverse mode. Snaps to real E12/E24/E96 standard resistor values — always rounding up, never down, to keep your LED safe.
Build a customizable ESP32 LED chaser with 8 LEDs. Choose group size (1/2/3/4 LEDs) and chase speed for different blink animation patterns.
An ESP32 project that blinks an LED on a configurable GPIO pin with adjustable on and off timing. Customize the pin and interval before downloading ready-to-flash Arduino code.
Build a customizable Arduino digital clock using DS3231 RTC and 16x2 LCD with UTC timezone offset, 12/24-hour format, and adjustable backlight brightness.