Serial.print: see your knob's number

Your knob is connected… but what number is the Arduino really reading? 🎛️👀

1️⃣ OPEN A LINE: in setup() write Serial.begin(9600); — it opens a line to your laptop over the USB cable at 9600 bits per second.

2️⃣ PRINT IT: in loop() read the knob and print it:
int knob = analogRead(A0);
Serial.println(knob);
delay(100);
Open Tools → Serial Monitor and you see 0 to 1023, live, as you turn the knob.

3️⃣ GARBAGE ON SCREEN? The Serial Monitor must use the SAME speed as your code. Set it to 9600 baud too and the numbers appear.

📌 Can't see what your code is doing? Print it!