Raspberry Pi User Manual page 205

C H A P T E R 1 2
At this point, nothing will happen . That's perfectly normal: by default, the Raspberry Pi's
GPIO pins are switched off . If you want to check your circuit immediately, move the wire
from Pin 11 to Pin 1 to make the LED light up . Be careful not to connect it to Pin 2, though:
a current-limiting resistor suitable for a 3 .3 V power supply will be inadequate to protect the
LED when connected to 5 V . Remember to move the wire back to Pin 11 before continuing .
To make the LED do something useful, start a new Python project . As with the projects in
Chapter 11, "An Introduction to Python", you can use a plain text editor or the IDLE soft-
ware included in the recommended Debian distribution for this project as well .
H A R D W A R E H A C K I N G
To GPIO Pin 11 To GPIO Pin 11
To GPIO Pin 6 To GPIO Pin 6
193
Figure 12-3:
A breadboard
circuit for a
simple LED
output