Arduino KIT — 15 independent Arduino UNO R3 sketches

Open sketches/<name>/<name>.ino separately. Select Arduino Uno.
Serial Monitor: 9600 baud. Each sketch is a separate experiment.
Never connect 12 V to GPIO or 5V. Check actual module pinout and ratings.
Use one resistor per LED channel. Relay example leaves relay OFF, no load.
IR NEC example is test data, not an arbitrary air conditioner command.
IRremoteESP8266 targets ESP8266/ESP32, not ATmega328P UNO.
Encoder example reads raw signals; it is not a debounced rotation counter.

External libraries: Adafruit DHT + Adafruit Unified Sensor, OneWire,
DallasTemperature, Arduino-IRremote (IRremote.hpp API).
Hardware operation of all modules and an air conditioner is not verified.
See GUIDE-RU.txt / GUIDE-SR.txt for wiring and limits.
