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Artoo
Binary, decimal and hex converter
Board release tracker: Raspberry Pi, ESP32 and Arduino
GPIO pinout: Raspberry Pi, Pico, ESP32 and Arduino Uno
LED resistor calculator
Maker tools
Ohm’s law calculator
Resistor color code calculator
Resistor color code calculator
Resistor colour code calculator
4 bands
5 bands
6 bands
Value to colours
Resistance
Bands
4
5
Show colours
Type a value like 220, 4.7k or 1M.