MP3 Player with Automation Interface -
MP3-445
The MP3-445 is a highly
versatile, highly configurable MP3 player and automation
interface with an onboard audio amplifier, and extensive
electrical input and output options. It can be everything
from a doorbell, to the control center for a complex
public multimedia display. It can operate independently,
or you can use the built in serial interface to have
it control other devices, or be controlled by other
devices, including computers.
Click the image or here
for a larger picture.
Features
• Solid-state Compact Flash Mp3 Player supporting
MPEG2 Layer 3 Stereo decoding at all MPEG sampling frequencies
and bit rates up to 256 kb/s including variable bit
rate (VBR).
• Operates in 2 stand alone modes (simple &
enhanced), and a peripheral mode (interfaced to a remote
computer or other device).
• Line-level unbalanced/balanced-isolated stereo
outputs.
• On-board power amplifier capable of 2x25W stereo
outputs with output AC/DC short-circuit protection.
• On-board L-R channel volume control.
• 16 switch inputs with transient protection.
• 2 opto-isolated inputs.
• 16 outputs with 250mA continuous or 1.5A pulsed
current per output.
• Supports Compact Flash Cards type I and II with
capacities up to 4GB.
• Standard serial interface (RS-232) running at
9600 baud.
• DIP Switch selectable level/edge triggered inputs
and audio level adjustments.
Specifications
General
Input power……………9VAC-12VAC
@1A or 12VDC-16VDC @ 1A
Current consumption…..130mA typical during MP3
playback (without power amplifier), 80mA when idle
Storage medium………..FAT16 formatted
Compact Flash (CF) Cards Type I and II
Storage capacity………..4GB
I/O
Switch inputs…………...Active low
with transient protection. DIP Switch selectable triggering
Opto-isolator inputs…….3V to 12V DC
Outputs…………………250mA
continuous and 1.5A pulsed current per output.
Audio
Decoder…………………STA013
single chip MPEG2 Layer 3 decoder supporting STEREO
and
MONO channels and all MPEG 1 & 2 sampling frequencies
and bit rates
Up to 256 kb/s including variable bit rate (VBR).
Frequency response…….20Hz to 20 kHz
Distortion……………….THD
< 0.3% 2x10W/4ohm @ 14.4V, 1 kHz
THD < 10% 2x25W/4ohm @ 14.4V, 1kHz
Mechanical
Dimensions…………….203mm
(L) x 137mm (W). CF card exceeds longer edge by 12mm.
Weight…………………0.27
kg.
Mounting………………4
holes dia 3.35mm spaced 190mm horizontally and 123mm
vertically.
Operating conditions
Temperature
Operating…….. 0°C to +60°C
Storage………...-20°C to +70°C
Humidity…………………5%
to 80% RH non-condensing
Functions
Simple Stand-alone
Mode
Inputs…………….14 edge-triggered
or 7 level-triggered non-triggerable switch inputs.
Opto-isolated inputs 1 and 2 mapped to switch inputs
IN09 and IN10.
Either rising or falling edge transitions recognised
based on DIPSW settings. See DIP Switch Settings.
Outputs…………..14 high-current
outputs. One-to-one correspondence between outputs and
inputs.
Playback…………14 MP3 tracks. See
MP3 Track Numbering. One-to-one correspondence between
MP3 tracks and inputs.
Volume adjustment…Switch inputs IN15 and IN16.
Volume adjustment is done in real time and final value
is written to EEPROM on track end.
Enhanced Stand-alone
& Peripheral mode
I/O…………………16
unique inputs and outputs.
Playback…………...255 MP3 tracks.
See MP3 Track Numbering.
Serial I/F…………..4-pin header;
0-5V TTL levels; 9600 baud
Commands…………Read inputs, change
outputs, play/stop track, send configuration file/entry,
change volume. See Peripheral Mode Commands & Responses.
Configuration File….255 rules supporting 16 Input
Edges/Levels, 16 Outputs, 16 Timers, 16 Variables, multiple
IF-THEN constructs. See MP3 Configuration File.
Volume adjustment…Software control. 256 levels
in steps of 1.5dB.
Click here
for Application Notes.
Click here
for Wiring Information.
Accessories
MP3 CONTROLLER Board MPC-494
The MPC-494 is a small
50mm x 18mm board which piggybacks on to the serial
port of the MP3-445 Compact Flash MP3 board. It controls
I/O and MP3 playback based on rules in the user changeable
configuration file stored in the Compact Flash.
QUAD OPTO-ISOLATOR Board OPT-466
The OPT-466 Opto-isolator
board connects to any 4 of the 16 inputs of the MP3-445
to convert them into 4 opto-isolated inputs.
Click here for detailed specs on the OPT-466
DUAL QUAD RELAY Board RLY-312
The RLY-312 Relay Board
connects to 4 of the 16 outputs of the MP3-445 to convert
them into 4 DPDT relay outputs, each capable of switching
loads of 60W/125VA.
Click here for detailed specs on the RLY-312.
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