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Arduino uno User Guide

Arduino uno
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10
while (digitalRead(3) == LOW)
;
Serial.println("The switch is now open!");
}
Watch the activity in the Serial Monitor window as you press and release the switch.
4 Controlling a Small DC Motor
The Arduino can control a small DC motor through a transistor switch. You will need a TIP120
transistor, a 1K resistor a 9V battery with battery snap and a motor.
The TIP120 pins look like this and on a schematic the pins are like this
Here is the schematic diagram for how to connect the motor
And here is a pictorial diagram for how to connect the components. The connections can be
soldered or they can be made through a solderless breadboard.

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Arduino uno Specifications

General IconGeneral
Form factorArduino
CertificationRoHS, FC, CE
Processor model-
Processor frequency- MHz
Microcontroller modelATmega328
Microcontroller frequency16 MHz
DC input voltage7-12 V
Operating voltage5 V
DC current per I/O pin40 mA
Flash memory0.032 MB
Maximum internal memory- GB
SRAM (Static Random Access Memory)2 KB
EEPROM (Electrically Erasable Programmable Read-Only Memory)1 KB
Wi-FiNo
Number of analog I/O pins6
Number of digital I/O pins14
Weight and Dimensions IconWeight and Dimensions
Board dimensions53.4 x 68.6 mm

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