Examples
The full bundled demo catalogue. Click any card to drop into the Studio with parts wired and a working sketch loaded — then tweak, run, share.
Foundations
Blink
D13 → 220Ω → LED → GND. The Hello World of Arduino.
Open in Studio →PWM LED Fade
analogWrite() on D9 makes the LED breathe. PWM is real.
Open in Studio →Button → LED
Press the on-canvas button to light the LED. INPUT_PULLUP idiom.
Open in Studio →Knight Rider
6 LEDs on D2–D7 swept back and forth. Pure digital, no PWM.
Open in Studio →Inputs & Sensors
Live Pot → analogRead
Twist the pot while running; Serial prints the value live.
Open in Studio →LDR night-light
Photoresistor on A0; LED on D9 (PWM) brightens as the room darkens.
Open in Studio →Thermistor → A0
10 kΩ NTC thermistor on A0. Drag the slider to change temperature live.
Open in Studio →HC-SR04 Distance
Ping an ultrasonic sensor; print distance in cm.
Open in Studio →DHT11 → Serial
Read temperature + humidity over a single-wire DHT11 (10k pull-up).
Open in Studio →IR Remote → Serial
Virtual remote in the Inspector blasts NEC codes; sketch decodes them.
Open in Studio →Outputs & Display
RGB Color Mix
Common-cathode RGB on D9/D10/D11. Mix any colour with PWM.
Open in Studio →Buzzer melody
C-major scale on a piezo buzzer using tone() / noTone().
Open in Studio →LCD 16×2 Hello
Scroll a greeting on an HD44780 LCD and print millis() live.
Open in Studio →OLED Hello
SSD1306 128×64 over I²C — greeting + live frame counter. Uses Adafruit_SSD1306.
Open in Studio →NeoPixel rainbow
8 WS2812 LEDs on D6 cycling a rainbow. The 800 kHz one-wire protocol is decoded live.
Open in Studio →Pot → Servo
Twist the pot, watch the servo horn track the angle.
Open in Studio →Drivers & Power
74HC595 chase
8 LEDs driven from three Uno pins via a shift register.
Open in Studio →Relay click
D7 toggles a 5 V relay coil once a second.
Open in Studio →DC Motor + L293D
Drive a motor with direction + PWM speed through an H-bridge.
Open in Studio →NPN Low-Side Switch
D2 → 2N2222 base → switches an LED with the transistor.
Open in Studio →PNP High-Side Switch
D2 LOW → 2N2907 conducts on 5V and lights the LED.
Open in Studio →Capacitor blocks DC
Two LEDs on D13: one direct, one through a cap (stays dark).
Open in Studio →