MP3 Node
Hardware Installation and User Guide
9000-0000-127 Revision 01
21 of 21
Genave Electronics
Inputs
Input Header Characteristics
The inputs for the MP3 Node are used to trigger actions. When an input is pulled low (shorted
to pin 9 of J9) the MP3 Node turns on the amplifier output and plays the associated file.
Some features of the inputs:
1)
DO NOT
apply any voltage to the inputs. Only connect an input to pin 9 of J1.
Although the inputs have diodes to protect them from incoming voltages, they
should only be pulled low.
2) The inputs are protected from moderate voltage spike. Large voltage spikes will
overwhelm the input protection and damage the processor. Therefore keep
wires leading to the inputs as short as possible and twist the wires to reduce
voltage spikes.
3) Each input has a pull up resistor of 470 Ohms.
Input Header Pinout
