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authorbnewbold <bnewbold@ziggy.(none)>2009-09-06 12:17:09 -0400
committerbnewbold <bnewbold@ziggy.(none)>2009-09-06 12:17:09 -0400
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parent917b10c03dc80dff8f0b177c2d5f9230f6c852ff (diff)
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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head><title>virtual sqrls hardware</title>
+<style type="text/css">
+table {
+ border-collapse: collapse; }
+table th,td {
+ padding: 3px;
+ border: 1px black solid; }
+<body style="margin: 25px; font-family: helvetica;">
+<h1 style="border-bottom: 2px solid;">
+virtual sqrls hardware</h1>
+<i><a href="http://bnewbold.net">bnewbold</a>, <a href="http://git.bnewbold.net/?p=pysqrls.git;a=summary">git repository</a></i><br />
+<h2>Basic Design</h2>
+Arduino microcontrollers output audio via PWM method (see links). Signal is
+amplified by audio amp then output to speaker over variable length cables. 4
+potentiometers per board allow adjustment of volume, timing, and two
+software adjustments. There are two amps/speakers for each arduino and 5
+arduinos total. Each board/package is powered by a 5v wall wart.
+<p />
+Arduinos and protoboards were chosen in the interest of time and reusability;
+the cost will be about $37 each for those units (could drive at least 4
+speakers each if they had to?); chosing cheaper components like PICs and
+plain grid boards could bring the cost down to $10-15 but would require a lot
+of design, assembly, debuging, and would not be as easily reused afterwards.
+<p />
+The number of power supplies could be reduced if we ran power wires between
+the units.
+<p />
+The amount of "power wire" will depend on the physical situation, but this
+should be super cheap and we could get more at a hardware store last minute.
+<p />
+This all assumes tools and consumables like solder are availble (I have plenty).
+<h2>Parts list</h2>
+<p />
+N is the number of distinct microcontoller "units" (5?); M is the
+number of speakers with distinct outputs (5?). I say +1 on the cheap stuff in
+case something breaks or gets lost.
+<tr /><th>How many</th><th>What</th><th>Specific Part</th>
+<th>Cost Each (rounded)</th>
+<th>From where</th>
+<tr style="color:grey;" /><td />5
+ <td />Motion Sensors
+ <td />Parallax PIR Sensor Module<br />#555-28027
+ <td />
+ <td />Mouser <br />(already purchased)</i>
+<tr /><td />5
+ <td />Arduino Pro Board
+ <td />328 5v/16MHz DEV-08943 <br />(sparkfun version)
+ <td />$20
+ <td />Sparkfun (<a href="http://www.sparkfun.com/commerce/product_info.php?products_id=9219">link</a>)
+<tr /><td />5
+ <td />Arduino Protoboard
+ <td />DEV-07914 <br />(sparkfun version)
+ <td />$17
+ <td />Sparkfun (<a href="http://www.sparkfun.com/commerce/product_info.php?products_id=7914">link</a>)
+<tr /><td />5
+ <td />Straight Pin Headers, 40x1
+ <td />PRT-00116<br />(sparkfun version)
+ <td />$2.50
+ <td />Sparkfun (<a href="http://www.sparkfun.com/commerce/product_info.php?products_id=116">link</a>)
+<tr /><td />1
+ <td />FTDI-USB Breakout (Programming)
+ <td />DEV-09115
+ <td />$14
+ <td />Sparkfun (<a href="http://www.sparkfun.com/commerce/product_info.php?products_id=9115">link</a>)
+<tr /><td />5
+ <td />Wall Power supply (AC to 5v DC)
+ <td />EPS050100-P5RP
+ <td />$7.25
+ <td />Digikey(<a href="http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=T1038-P5RP-ND">link</a>)
+<tr /><td />??ft
+ <td />Power wire (high gauge)
+ <td />
+ <td />
+ <td />Radioshack?
+<tr /><td />10
+ <td />Speaker
+ <td />4ohm 3watt<br />COM-09149 (sparkfun)
+ <td />$2.50
+ <td />Sparkfun (<a href="http://www.sparkfun.com/commerce/product_info.php?products_id=9149">link</a>)
+<tr /><td />11
+ <td />Audio Amp (5v)
+ <td />5w stereo 12pin<br />Panasonic AN17822A
+ <td />$2.25
+ <td />Digikey (<a href="http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=AN17822A-ND">link</a>)
+<tr /><td />21
+ <td />Adjustment Potentiometers
+ <td />10k Ohm through-hole mount<br />EVN-D8AA03B14
+ <td />$0.40
+ <td />Digikey (<a href="http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=D4AA14-ND">link</a>)
+<tr /><td />3
+ <td />Rolls of stranded wire
+ <td />25ft each of Black, Red, White, 22awg
+ <td />$2.50
+ <td />Sparkfun (<a href="http://www.sparkfun.com/commerce/product_info.php?products_id=8867">link</a>)
+<p /><b>Total cost estimate: $300</b>
+<h2>Useful Links</h2>
+ <li />http://www.arduino.cc/en/Main/ArduinoBoardPro
+ <li />http://www.sparkfun.com/commerce/product_info.php?products_id=9219
+ <li />http://www.uchobby.com/index.php/2007/11/11/arduino-sound-part-1/
+ <li />http://www.k9spud.com/traxmod/pwmdac.php
+ <li />http://www.arduino.cc/playground/Code/PCMAudio
+<h2>Helpful Emails</h2>
+<blockquoteha>haha there are none!</blockquote>
+<span style="font-weight:bold; color:#00CC00;">([[[todo-status]]))</span>
+<br />lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum
+<br /><br />
+<span style="font-weight:bold; color:#orange;">([[[todo-status]]))</span>
+<br />lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum
+<br /><br />
+<span style="font-weight:bold; color:#red;">([[[todo-status]]))</span>
+<br />lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum lorem ipsum
+<br /><br />