Calculate electronic circuit values and components — Ohm's law, voltage dividers and resistors.
Calculates voltage, current, resistance or power from any two known quantities.
Calculates Vin, R1, R2 or Vout of a resistive divider from three known quantities.
Calculates or decodes value, tolerance and color bands of a resistor (4, 5 or 6 bands).
Look up pin functions, peripherals, and safety warnings for Arduino Uno, Nano, and ESP32.
Paint or animate a WS2812/NeoPixel LED pattern and generate ready-to-use Arduino code.
Build an Arduino/ESP32 sketch skeleton from the peripherals your project needs.
Generate an example secrets.h for Arduino/ESP32 and the .gitignore line that protects it.
Calculates the electricity cost of a device list from power, daily use and tariff.