3.3V
Regulated
3.3V in or
out
If you already have a regulated 3.3V supply, you can use this pin to power the
board. (Powering the board through this pin will not charge the battery.) You
can also pull 3.3V power out of this pin if you need it somewhere else.
GND
Ground
(0V)
Use as a power ground, and also for the return side of your trigger switches
(see the diagram
).
T1
Trigger 1
General purpose I/O pin (Arduino pin A0). You'll usually connect this through
a switch to ground. Can also be used as an analog input.
T2
Trigger 2 /
SDA
General purpose I/O pin (Arduino pin A4). You'll usually connect this through
a switch to ground. Can also be used as SDA (serial data) in an I2C ("wire"
library) connection (4.7K pullup included), or an analog input if the pullup is
disabled.
T3
Trigger 3 /
SCL
General purpose I/O pin (Arduino pin A5). You'll usually connect this through
a switch to ground. Can also be used as SCL (serial clock) in an I2C ("wire"
library) connection (4.7K pullup included), or an analog input
T4
Trigger 4 /
TX
General purpose I/O pin (Arduino pin D1). You'll usually connect this through
a switch to ground. Can also be used as TX (transmit) in a serial connection.
Do not permanently pull this pin low or reprogramming and serial monitoring
will be disabled.
T5
Trigger 5 /
RX
General purpose I/O pin (Arduino pin D0). You'll usually connect this through
a switch to ground. Can also be used as RX (receive) in a serial connection.
Do not permanently pull this pin low or reprogramming and serial monitoring
will be disabled.
Right
Speaker
+
Right
Speaker
+
Connect to the right s terminal. Only connect to a speaker or other
coil-based transducer. Do not short to power, ground, or any other signal.
Right
Speaker
-
Right
Speaker -
Connect to the right speaker - terminal. Only connect to a speaker or other
coil-based transducer. Do not short to power, ground, or any other signal.
Left
Speaker
+
Left
Speaker
+
Connect to the left s terminal. Only connect to a speaker or other
coil-based transducer. Do not short to power, ground, or any other signal.
Left
Speaker
-
Left
Speaker -
Connect to the left speaker - terminal. Only connect to a speaker or other coil-
based transducer. Do not short to power, ground, or any other signal.
You may have noticed the unused footprint in the middle of the board. That is there to allow you to
add an optional
RGB rotary encoder
if you wish. You won't need it to run the preinstalled "Trigger"
software, but if you want to turn the LilyPad MP3 Player into a true audio player, the rotary encoder
provides a simple user interface to switch tracks and change the volume. See the
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