Datasheet

WHAT WE’RE DOING:
Parts:
The Internet
THE CIRCUIT:
Schematic
20
CIRC-07
.:Button Pressing:.
.:Pushbuttons:.
Up to this point we have focused entirely on outputs, time to
get our Arduino to listen, watch and feel. We'll start with a
simple pushbutton. Wiring up the pushbutton is simple. There is
one component, the pull up resistor, that might seem out of place.
This is included because an Arduino doesn't sense the same way we do (ie button pressed,
button unpressed). Instead it looks at the voltage on the pin and decides whether it is HIGH
or LOW. The button is set up to pull the Arduino's pin LOW when it is pressed, however, when
the button is unpressed the voltage of the pin will float (causing occasional errors). To get the
Arduino to reliably read the pin as HIGH when the button is unpressed, we add the pull up
resistor.
(note: the first example program uses only one of the two buttons)
Wire
Pushbutton
x2
560 Ohm Resistor
Green-Blue-Brown
x1
2 Pin Header
x4
CIRC-07
Breadboard Sheet
x1
Red LED
x1
10k Ohm Resistor
Brown-Black-Orange
x2
Arduino
pin 13
LED
resistor
(560ohm)
gnd
(ground) (-)
pin 2
pushbutton
pin 3
+5 volts
Arduino
resistor
(10k ohm)
.:download:.
breadboard layout sheet
http://ardx.org/BBLS07
.:view:.
assembly video
http://ardx.org/VIDE07