31316 Parallax Inc, 31316 Datasheet - Page 5

• Manufacturer Part Number: 31316
• Description: Microcontroller Modules & Accessories AP-16 Audio Player
• Manufacturer: Parallax Inc
• Series: Propeller™r

Specifications of 31316

• Product: Microcontroller Accessories
• Data Bus Width: 16 bit
• Clock Speed: 44.1 KHz
• Operating Supply Voltage: 18 V
• Board Size: 107.95 mm x 114.3 mm
• Main Purpose: Audio, Audio Processing
• Embedded: Yes, MCU, 32-Bit
• Utilized Ic / Part: P8X32A
• Primary Attributes: Plays Stereo WAV Files (16-bit), Dual 20W Amps (1 Per Channel)
• Secondary Attributes: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pre-Play and Post-Play Delays
For stand-alone projects the AP-16+ includes potentiometers for setting pre- and post-play delays applied to
manually-started SFXnn.WAV files (AUXnn.WAV files are not affected). The pre-play delay, 0 to 30 seconds,
is set by the PRE potentiometer (P). During this delay the STATUS LED will flash between yellow and green,
and the AP-16+ will remain silent (AMBIENT.WAV will be stopped if it was playing).
The post-delay potentiometer (Q) can be used to prevent immediate re-triggering of audio; this is especially
useful when using the AP-16+ for stand-alone audio and prop control. The post-play delay, 0s to 3 minutes, is
set by the POST potentiometer (Q). During this delay the STATUS LED (S) will flash between red and green,
and if the ambient Loop switch (Q) is set to ON, AMBIENT.WAV will be re-started during the post-play delay.
Relay Control Output
The AP-16+ has an on-board relay with normally-open and normally-closed contacts (R). The relay is
automatically activated when an audio is played. The relay is not activated for AMBIENT.WAV, or during the
pre- and post-play delay periods.
Note: The user may override automatic relay activation on playback when desired. To override the relay place
a file called "NORELAY.TXT" onto the SD card; the contents of the file do not matter, the AP-16+ simply looks
for a file with that name. When the file exists the relay is not activated when audio plays.
For applications that use a master controller the "R" command may be used (see Serial Protocol section) for
relay control.
EFX-TEK ● www.efx-tek.com ● [e-mail]
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NOTE: As of firmware version 1.3 the POST delay potentiometer is divided into two ranges. From
full counter-clockwise to the mid-point is 0 to 30 seconds; from the mid-point to full-clockwise is 30
seconds to 3 minutes. This allows greater precision when setting short post-play delays.
NOTE: The minimum post-play delay is ~5 seconds unless the POST-play potentiometer is turned
fully counter-clockwise (no delay).
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