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C
CircuitSim
Template · Button + LED
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Wire
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4 parts · 5 wires
ATMEGA
UNO R3
13
12
~11
~10
~9
8
7
~6
~5
4
~3
2
GND
5V
3.3V
A0
A1
A2
A3
A4
A5
1a
2a
1b
2b
A
C
1
2
sketch.ino
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const int BUTTON = 2; const int LED = 13; void setup() { pinMode(BUTTON, INPUT_PULLUP); pinMode(LED, OUTPUT); } void loop() { digitalWrite(LED, digitalRead(BUTTON) == LOW ? HIGH : LOW); }