Arduino tutorial #2

Arduino tutorial #2

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  1 Arduino Tutorial #2 -Blink the built-in LED & Control the external LED - Dong Ho Son POSTECH Pohang, Korea donghoson@postech.ac.kr
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  2 Blink the built-inLED - Overview  Let’s blink the LED • Simple code • Turn on the built-in LED − Built-in LED for test − Internally connected to digital pin #13 Source: pixabay.com/photo-2168193
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  3 Blink the built-inLED - Sketch  setup() { } • pinMode(13, OUTPUT); − Prepare the mode of pin − We will use pin #13 − We will order to LED  OUTPUT  loop() { } • digitalWrite(13, HIGH); − Turn on the built-in LED • Delay(1000); − Need 1 sec (1000ms) to check step-by-step • digitalWrite(13, LOW); − Turn off the built-in LED
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  4 Blink the built-inLED - Result  Built-in LED blinks! LED OFF!LED ON! Source: pixabay.com/photo-2168193
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  5 Control external LED- Overview  Jumper cables • Pin #2  Breadboard • Breadboard  GND (Ground)  LED • Longer lead (Positive)  Pin #2 • Shorter lead (Negative)  Resistor  Resistor • Necessary to protect the LED  Breadboard • Power rails − The top and bottom rows of holes are connected horizontally • Terminal strips − Remaining holes are connected vertically Positive Negative Power rails Terminal strips Source: pixabay
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  6 Control external LED– Circuit  Configure the circuit • Jumper cables • LED • Resistor (220 Ohm) • Breadboard +- Source: pixabay.com/photo-2168193
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  7 Control external LED- Sketch  setup() { } • pinMode(2, OUTPUT); − Prepare the mode of pin − We will use pin #2 − We will order to LED  OUTPUT  loop() { } • digitalWrite(2, HIGH); − Turn on the built-in LED • Delay(500); − Need 0.5 sec (500ms) to check step-by-step • digitalWrite(2, LOW); − Turn off the built-in LED
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  8 Control the externalLED - Result  External LED blinks! +- Source: pixabay.com/photo-2168193
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  9 How to Usea Breadboard  If you are not familiar with how to use a breadboard, please take a look at the following tutorial on how to use a breadboard https://www.sciencebuddies.org/science-fair-projects/references/how- to-use-a-breadboard  Watch the video first